A) The potential at point P is 6 V
B) The potential at point Q is +0.5 V
C) If a voltmeter is connected across the 6 V battery, it will read 7 V
D) If a voltmeter is connected across the 6 V battery, it will read 5 V
Correct Answer: C
Solution :
Total resistance \[=4+1+0.5=6\Omega .\] Net volt- age in the circuit is 6 V. Current \[I=\frac{6}{6}=1\,A\]in the anticlockwise direction. \[{{V}_{PR}}=1\times 4=4V\] Since R is connected to earth, \[{{V}_{R}}=0.\]Hence \[{{V}_{P}}=4V\]\[{{V}_{SQ}}=0.5\times 1=0.5\,V.S\] is at a higher potential than Q \[\therefore \]\[{{V}_{Q}}=-0.5\,V\] Current is being forced into the 6 V battery in the opposite direction. Hence \[{{V}_{6}}=E+Ir=6+1\times 1=7V\] Hence, the correction option is [c].
You need to login to perform this action.
You will be redirected in
3 sec
