Magnetic Effects of Current / करंट का चुंबकीय प्रभाव
JEE Main & Advanced
Physics
Magnetic Effects of Current / करंट का चुंबकीय प्रभाव
JEE PYQ-Magnetic Effects Of Current
question_answer
The velocity of certain ions that pass un deflected through crossed electric field E = 7.7 k V/m and magnetic field B = 0.14T is [JEE ONLINE 07-05-2012]
A)18km/s
B)77km/s
C)55km/s
D)1078 km/s
Correct Answer:
C
Solution :
[c] As velocity\[v=\frac{E}{B}=\frac{7.7\times {{10}^{3}}}{0.14}=55km/s\]