A) Attract each other done clear
B) Repel each other done clear
C) Neither attract nor repel done clear
D) Get rotated to be perpendicular to each other done clear
View Solution play_arrowA) Rotate about an axis parallel to the wire done clear
B) Move away from the wire or towards right done clear
C) Move towards the wire done clear
D) Remain stationary done clear
View Solution play_arrowA) 0.15 \[ampere-{{m}^{2}}\] done clear
B) 0.3 \[ampere-{{m}^{2}}\] done clear
C) 0.45 \[ampere-{{m}^{2}}\] done clear
D) 0.6 \[ampere-{{m}^{2}}\] done clear
View Solution play_arrowA) \[ir\overrightarrow{B}\] done clear
B) \[2\pi ri\overrightarrow{B}\] done clear
C) Zero done clear
D) \[\pi ri\overrightarrow{B}\] done clear
View Solution play_arrowA) \[\frac{{{\mu }_{0}}{{i}^{2}}}{{{b}^{2}}}\] done clear
B) \[\frac{{{\mu }_{0}}{{i}^{2}}}{2\pi b}\] done clear
C) \[\frac{{{\mu }_{0}}i}{2\pi b}\] done clear
D) \[\frac{{{\mu }_{0}}i}{2\pi {{b}^{2}}}\] done clear
View Solution play_arrowA) \[8\times {{10}^{-5}}N\] done clear
B) \[4\times {{10}^{-7}}N\] done clear
C) \[4\times {{10}^{-5}}N\] done clear
D) \[4\pi \times {{10}^{-7}}N\] done clear
View Solution play_arrowA) Do not exert any force on each other done clear
B) Repel each other done clear
C) Attract each other done clear
D) Get rotated to be perpendicular to each other done clear
View Solution play_arrowA) \[\infty \] done clear
B) Zero done clear
C) \[\frac{{{\mu }_{0}}}{4\pi }\frac{2{{i}_{1}}{{i}_{2}}}{r}N/m\] done clear
D) \[\frac{2{{i}_{1}}{{i}_{2}}}{r}N/m\] done clear
View Solution play_arrowA) An attractive force on each other done clear
B) A repulsive force on each other done clear
C) No force on each other done clear
D) A rotational torque on each other done clear
View Solution play_arrowA) \[5\times {{10}^{-5}}\,N/m\] done clear
B) \[5\times {{10}^{-3}}\,N/m\] done clear
C) \[2.5\times {{10}^{-5}}\,N/m\] done clear
D) \[2.5\times {{10}^{-4}}\,N/m\] done clear
View Solution play_arrowA) \[1\times {{10}^{-3}}\,N\] done clear
B) \[2\times {{10}^{-3}}\,N\] done clear
C) \[4\times {{10}^{-3}}\,N\] done clear
D) \[0.25\times {{10}^{-3}}\,N\] done clear
View Solution play_arrowA) 0.1 J done clear
B) 0.2 J done clear
C) 0.4 J done clear
D) 0.8 J done clear
View Solution play_arrowA) \[3\times {{10}^{4}}\,newton\] done clear
B) \[3\times {{10}^{2}}\,newton\] done clear
C) \[3\times {{10}^{-2}}\,newton\] done clear
D) \[3\times {{10}^{-4}}\,newton\] done clear
View Solution play_arrowA) ir done clear
B) \[2\pi ir\] done clear
C) \[i\pi {{r}^{2}}\] done clear
D) \[\frac{1}{{{r}^{2}}}\] done clear
View Solution play_arrowA) Shape of the loop done clear
B) Area of the loop done clear
C) Value of the current done clear
D) Magnetic field done clear
View Solution play_arrowquestion_answer16) To make the field radial in a moving coil galvanometer [MP PET 1993]
A) The number of turns in the coil is increased done clear
B) Magnet is taken in the form of horse-shoe done clear
C) Poles are cylindrically cut done clear
D) Coil is wounded on aluminium frame done clear
View Solution play_arrowquestion_answer17) The deflection in a moving coil galvanometer is [MP PMT 1993]
A) Directly proportional to the torsional constant done clear
B) Directly proportional to the number of turns in the coil done clear
C) Inversely proportional to the area of the coil done clear
D) Inversely proportional to the current flowing done clear
View Solution play_arrowA) A high resistance is to be connected across its terminals done clear
B) A magnet should be placed near the coil done clear
C) A small copper wire should be connected across its terminals done clear
D) The body of galvanometer should be earthed done clear
View Solution play_arrowA) \[i\propto \tan \theta \] done clear
B) \[i\propto \theta \] done clear
C) \[i\propto {{\theta }^{2}}\] done clear
D) \[i\propto \sqrt{\theta }\] done clear
View Solution play_arrowA) \[1\,N/m\] done clear
B) \[2\times {{10}^{-7}}\,N/m\] done clear
C) \[1\times {{10}^{-2}}\,N/m\] done clear
D) \[4\pi \times {{10}^{-7}}\,N/m\] done clear
View Solution play_arrowA) \[N{{A}^{2}}{{B}^{2}}I\] done clear
B) \[NAB{{I}^{2}}\] done clear
C) \[{{N}^{2}}ABI\] done clear
D) NABI done clear
View Solution play_arrowA) NAIB done clear
B) 2NAIB done clear
C) \[2\pi NAIB\] done clear
D) \[4\pi NAIB\] done clear
View Solution play_arrowA) \[NI/A\] done clear
B) \[N{{I}^{2}}A\] done clear
C) \[{{N}^{2}}AI\] done clear
D) NIA done clear
View Solution play_arrowA) \[30{}^\circ \] done clear
B) \[45{}^\circ \] done clear
C) \[60{}^\circ \] done clear
D) \[90{}^\circ \] done clear
View Solution play_arrowA) \[ni\,\overrightarrow{A}\times \overrightarrow{B}\] done clear
B) \[ni\,\overrightarrow{A}\cdot \overrightarrow{B}\] done clear
C) \[\frac{1}{n}(i\overrightarrow{A}\times \overrightarrow{B})\] done clear
D) \[\frac{1}{n}(i\overrightarrow{A}\cdot \overrightarrow{B})\] done clear
View Solution play_arrowA) evr done clear
B) \[\frac{1}{2}evr\] done clear
C) \[\pi {{r}^{2}}ev\] done clear
D) \[2\pi rev\] done clear
View Solution play_arrowA) Couple on loop P will be the highest done clear
B) Couple on loop Q will be the highest done clear
C) Couple on loop R will be the highest done clear
D) Couple on loop S will be the highest done clear
View Solution play_arrowA) The magnetic field is parallel to the plane of the coil done clear
B) The magnetic field is perpendicular to the plane of the coil done clear
C) The magnetic field is at 45o with the plane of the coil done clear
D) Always in any orientation done clear
View Solution play_arrowA) Wherever left free done clear
B) North-south done clear
C) East-west done clear
D) At \[45{}^\circ \] with the east-west direction done clear
View Solution play_arrowA) \[0{}^\circ \] to the direction of the field done clear
B) \[45{}^\circ \] to the direction of the field done clear
C) \[90{}^\circ \] to the direction of the field done clear
D) \[135{}^\circ \] to the direction of the field done clear
View Solution play_arrowA) \[ni\,AB\tan \theta \] done clear
B) \[ni\,AB\cos \theta \] done clear
C) \[ni\,AB\sin \theta \] done clear
D) \[ni\,AB\] done clear
View Solution play_arrowA) Plane surfaces of a bar magnet done clear
B) Plane surfaces of a horse-shoe magnet done clear
C) Cylindrical surfaces of a bar magnet done clear
D) Cylindrical surfaces of a horse-shoe magnet done clear
View Solution play_arrowA) The number of turns in the coil done clear
B) The area of the coil done clear
C) The magnetic field done clear
D) The couple per unit twist of the suspension done clear
View Solution play_arrowA) The ring will feel a force of attraction done clear
B) The ring will feel a force of repulsion done clear
C) It will move to and fro about its centre of gravity done clear
D) None of these done clear
View Solution play_arrowA) A and B will repel each other with same force done clear
B) A and B will attract each other with same force done clear
C) A will attract B, but B will repel A done clear
D) A and B will attract each other with different forces done clear
View Solution play_arrowA) \[1.4\times {{10}^{-4}}N\] towards the right done clear
B) \[1.4\times {{10}^{-4}}N\] towards the left done clear
C) \[2.6\times {{10}^{-4}}N\] to the right done clear
D) \[2.6\times {{10}^{-4}}N\] to the left done clear
View Solution play_arrowA) 0.32 Nm tending to rotate the side AD out of the page done clear
B) 0.32 Nm tending to rotate the side AD into the page done clear
C) 0.0032 Nm tending to rotate the side AD out of the page done clear
D) 0.0032 Nm tending to rotate the side AD into the page done clear
View Solution play_arrowA) \[30{}^\circ \] done clear
B) 45? done clear
C) 60? done clear
D) 90? done clear
View Solution play_arrowA) 1.5 N done clear
B) 2.0 N done clear
C) 2.5 N done clear
D) 3.5 N done clear
View Solution play_arrowA) \[5\times {{10}^{4}}\,rad/\mu \,amp\] done clear
B) \[5\times {{10}^{-6}}\,per\,amp\] done clear
C) \[2\times {{10}^{-7}}\,per\,amp\] done clear
D) \[5\,rad/\mu \,amp\] done clear
View Solution play_arrowA) Zero done clear
B) 200 N-m done clear
C) 2 N-m done clear
D) 10 N-m done clear
View Solution play_arrowquestion_answer42) If a current is passed in a spring, it [MP PMT/PET 1998; AIEEE 2002]
A) Gets compressed done clear
B) Gets expanded done clear
C) Oscillates done clear
D) Remains unchanged done clear
View Solution play_arrowA) \[M/A\] done clear
B) \[A/M\] done clear
C) MA done clear
D) \[{{A}^{2}}M\] done clear
View Solution play_arrowA) \[1\times {{10}^{-15}}\] done clear
B) \[1\times {{10}^{-10}}\] done clear
C) \[1\times {{10}^{-23}}\] done clear
D) \[1\times {{10}^{-27}}\] done clear
View Solution play_arrowA) Zero done clear
B) IBl done clear
C) \[\frac{\sqrt{3}}{2}I{{l}^{2}}{{B}^{2}}\] done clear
D) \[\frac{\sqrt{3}}{4}IB{{l}^{2}}\] done clear
View Solution play_arrowA) 9 cm done clear
B) 7 cm done clear
C) 5 cm done clear
D) 3 cm done clear
View Solution play_arrowA) North done clear
B) South done clear
C) East done clear
D) West done clear
View Solution play_arrowA) Torque is formed done clear
B) E.M.f. is induced done clear
C) Both (a) and (b) are correct done clear
D) None of these done clear
View Solution play_arrowA) An end-on position done clear
B) A broad side-on position done clear
C) Both (a) and (b) done clear
D) Neither (a) nor (b) done clear
View Solution play_arrowA) \[{{10}^{-5}}N\] done clear
B) \[{{10}^{-4}}N\] done clear
C) \[{{10}^{-3}}N\] done clear
D) \[{{10}^{-2}}N\] done clear
View Solution play_arrowA) 2.4 N done clear
B) 1.2 N done clear
C) 3.0 N done clear
D) 2.0 N done clear
View Solution play_arrowA) \[2\times {{10}^{-4}}N\], attractive done clear
B) \[2\times {{10}^{-4}}N\], repulsive done clear
C) \[2\times {{10}^{-7}}N\], attractive done clear
D) \[2\times {{10}^{-7}}N\], repulsive done clear
View Solution play_arrowA) Increasing the magnetic field of the permanent magnet done clear
B) Increasing the area of the deflecting coil done clear
C) Increasing the number of turns in the coil done clear
D) Increasing the restoring couple of the coil done clear
View Solution play_arrowA) \[6.9\times {{10}^{-2}}amp-{{m}^{2}}\] done clear
B) \[2.3\times {{10}^{-2}}amp\text{-}\,{{m}^{2}}\] done clear
C) \[{{10}^{-2}}amp-{{m}^{2}}\] done clear
D) \[{{10}^{-3}}amp-{{m}^{2}}\] done clear
View Solution play_arrowA) 2.0 A done clear
B) \[2.0\times {{10}^{-7}}A\] done clear
C) 1.0 A done clear
D) \[1.0\times {{10}^{-7}}A\] done clear
View Solution play_arrowA) Of attraction in plane of paper done clear
B) Of repulsion in plane of paper done clear
C) Upwards perpendicular to plane of paper done clear
D) Downwards perpendicular to plane of paper done clear
View Solution play_arrowA) Zero done clear
B) 0.01 N-m done clear
C) 0.001 N-m done clear
D) 0.8 N-m done clear
View Solution play_arrowquestion_answer58) Magnetic dipole moment of a rectangular loop is [RPET 2000]
A) Inversely proportional to current in loop done clear
B) Inversely proportional to area of loop done clear
C) Parallel to plane of loop and proportional to area of loop done clear
D) Perpendicular to plane of loop and proportional to area of loop done clear
View Solution play_arrowA) \[\overset{\to \,\,\to }{\mathop{m.B}}\,\] done clear
B) \[\frac{\overset{\to }{\mathop{|m|}}\,}{\overset{\to }{\mathop{|B|}}\,}\] done clear
C) \[\overset{\to \,\,\,\,\to }{\mathop{m\times B}}\,\] done clear
D) \[\overset{\to \,\,\,\,\,\,\,\,\,\,\to }{\mathop{|m|.\,|B|}}\,\] done clear
View Solution play_arrowquestion_answer60) What is the net force on the square coil [DCE 2000; RPMT 2000]
A) \[25\times {{10}^{-7}}N\] moving towards wire done clear
B) \[25\times {{10}^{-7}}N\] moving away from wire done clear
C) \[35\times {{10}^{-7}}N\] moving towards wire done clear
D) \[35\times {{10}^{-7}}N\] moving away from wire done clear
View Solution play_arrowA) \[{{10}^{-5}}N,\,\]attractive done clear
B) \[{{10}^{-5}}N,\,\]repulsive done clear
C) \[2\times {{10}^{-5}}N,\,\]attractive done clear
D) \[2\times {{10}^{-5}}N,\,\]repulsive done clear
View Solution play_arrowA) The strength of its magnet done clear
B) The torsional constant of its suspension done clear
C) The number of turns in its coil done clear
D) The area of its coil done clear
View Solution play_arrowA) \[1.32\times {{10}^{-4}}amp-{{m}^{2}}\] done clear
B) \[2.62\times {{10}^{-4}}amp\text{-}{{m}^{2}}\] done clear
C) \[5.25\times {{10}^{-4}}amp\text{-}{{m}^{2}}\] done clear
D) \[7.85\times {{10}^{-4}}amp\text{-}{{m}^{2}}\] done clear
View Solution play_arrowA) \[B{{R}^{3}}/2\pi {{\mu }_{0}}\] done clear
B) \[2\pi B{{R}^{3}}/{{\mu }_{0}}\] done clear
C) \[B{{R}^{2}}/2\pi {{\mu }_{0}}\] done clear
D) \[2\pi B{{R}^{2}}/{{\mu }_{0}}\] done clear
View Solution play_arrowquestion_answer65) The magnetic moment of a circular coil carrying current is [MP PET 2000]
A) Directly proportional to the length of the wire in the coil done clear
B) Inversely proportional to the length of the wire in the coil done clear
C) Directly proportional to the square of the length of the wire in the coil done clear
D) Inversely proportional to the square of the length of the wire in the coil done clear
View Solution play_arrowA) Repulsive force of \[{{10}^{-4}}N/m\] done clear
B) Attractive force of \[{{10}^{-4}}N/m\] done clear
C) Repulsive force of \[2\pi \times {{10}^{-5}}N/m\] done clear
D) Attractive force of \[2\pi \times {{10}^{-5}}N/m\] done clear
View Solution play_arrowA) The electron stream will be pulled upward done clear
B) The electron stream will be pulled downward done clear
C) The electron stream will be retarted done clear
D) The electron beam will be speeded up towards the right done clear
View Solution play_arrowA) \[\frac{{{\sigma }_{i}}}{G}={{\sigma }_{V}}\] done clear
B) \[\frac{{{\sigma }_{_{V}}}}{G}={{\sigma }_{i}}\] done clear
C) \[\frac{G}{{{\sigma }_{V}}}={{\sigma }_{i}}\] done clear
D) \[\frac{G}{{{\sigma }_{i}}}={{\sigma }_{V}}\] done clear
View Solution play_arrowA) Concave done clear
B) Horse shoe magnet done clear
C) Convex done clear
D) None of these done clear
View Solution play_arrowA) 7.5 N done clear
B) 1.5 N done clear
C) 0.5 N done clear
D) 2.5 N done clear
View Solution play_arrowA) Zero done clear
B) \[2\pi \,r\,i\,B\] done clear
C) \[\pi \,{{r}^{2}}\,i\,B\] done clear
D) \[2\pi \,{{r}^{2}}\,i\,B\] done clear
View Solution play_arrowA) Zero done clear
B) IBL done clear
C) 2IBL done clear
D) \[\frac{1}{2}IBL\] done clear
View Solution play_arrowA) Directly proportional to N done clear
B) Inversely proportional to N done clear
C) Inversely proportional to \[{{N}^{2}}\] done clear
D) Independent of N done clear
View Solution play_arrowA) A radial uniform magnetic field is produced done clear
B) A uniform magnetic field is produced done clear
C) There is a steady deflection of the coil done clear
D) All of these done clear
View Solution play_arrowA) \[{{F}_{1}}=2{{F}_{2}}\] done clear
B) \[{{F}_{2}}=2{{F}_{1}}\] done clear
C) \[{{F}_{1}}={{F}_{2}}\] done clear
D) \[{{F}_{1}}=-{{F}_{2}}\] done clear
View Solution play_arrowA) \[8\times {{10}^{-20}}N\] done clear
B) \[3.2\times {{10}^{-19}}N\] done clear
C) \[8\times {{10}^{-18}}N\] done clear
D) \[1.6\times {{10}^{-19}}N\] done clear
View Solution play_arrowA) A is more sensitive than B done clear
B) B is more sensitive than A done clear
C) A and B are equally sensitive done clear
D) Sensitiveness of B is 5/3 times that of A done clear
View Solution play_arrowA) \[1.6\times {{10}^{-5}}N\] (attractive) done clear
B) \[1.6\times {{10}^{-5}}N\] (repulsive) done clear
C) \[16\times {{10}^{-5}}N\] (attractive) done clear
D) \[16\times {{10}^{-5}}N\] (repulsive) done clear
View Solution play_arrowquestion_answer79) If the current is doubled, the deflection is also doubled in [Orissa JEE 2002]
A) A tangent galvanometer done clear
B) A moving coil galvanometer done clear
C) Both (a) and (b) done clear
D) None of these done clear
View Solution play_arrowquestion_answer80) Which is a vector quantity [AFMC 2003]
A) Density done clear
B) Magnetic flux done clear
C) Intensity of magnetic field done clear
D) Magnetic potential done clear
View Solution play_arrowA) Towards A done clear
B) Towards C done clear
C) Perpendicular to the plane of paper and outward done clear
D) Perpendicular to the plane of paper and inward done clear
View Solution play_arrowA) ? 2F done clear
B) F/3 done clear
C) 2F/3 done clear
D) ? F/3 done clear
View Solution play_arrowquestion_answer83) The resultant magnetic moment of neon atom will be [J & K CET 2004]
A) Infinity done clear
B) mB done clear
C) Zero done clear
D) mB/2 done clear
View Solution play_arrowA) 100 A done clear
B) 10 A done clear
C) 1 A done clear
D) Zero done clear
View Solution play_arrowA) Attract each other done clear
B) Repel each other done clear
C) No relation done clear
D) Neither attract nor repel done clear
View Solution play_arrowA) 2.5 amp done clear
B) 3.5 amp done clear
C) 1.5 amp done clear
D) 0.5 amp done clear
View Solution play_arrowA) \[\frac{Li{{B}^{2}}}{2}\] done clear
B) \[\frac{L{{i}^{2}}B}{2}\] done clear
C) \[\frac{{{L}^{2}}iB}{4\pi }\] done clear
D) \[\frac{L{{i}^{2}}B}{4\pi }\] done clear
View Solution play_arrowA) Avoid the production of induced e.m.f. done clear
B) Avoid the production of eddy currents done clear
C) Increase the production of eddy currents done clear
D) Increase the production of induced e.m.f. done clear
View Solution play_arrowA) Attract each other with a force of \[{{\mu }_{0}}{{i}^{2}}/(2\pi {{d}^{2}})\] done clear
B) Repel each other with a force of \[{{\mu }_{0}}{{i}^{2}}/(2\pi {{d}^{2}})\] done clear
C) Attract each other with a force of \[{{\mu }_{0}}{{i}^{2}}/(2\pi d)\] done clear
D) Repel each other with a force of \[{{\mu }_{0}}{{i}^{2}}/(2\pi d)\] done clear
View Solution play_arrowA) 10-3 N done clear
B) 2.5 ? 10-3 N done clear
C) Zero done clear
D) 1.5 ? 10-3 N done clear
View Solution play_arrowA) 31.4 Nm done clear
B) 3.14 Nm done clear
C) 0.314 Nm done clear
D) Zero done clear
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