A, B and C are three points in a uniform electric field. The electric potential is
A
maximum at C
B
same at all the three points A, B and C
C
maximum at A
D
maximum at B
2
NEET 2013
MCQ (Single Correct Answer)
+4
-1
The resistances of the four arms P, Q, R and S in a Wheatstone's bridge are 10 ohm, 30 ohm, 30 ohm and 90 ohm, respectively. The e.m.f. and internal resistance of the cell are 7 volt and 5 ohm respectively. If the galvanometer resistance is 50 ohm, the current drawn from the celll will be
A
0.1 A
B
2.0 A
C
1.0 A
D
0.2 A
3
NEET 2013
MCQ (Single Correct Answer)
+4
-1
The internal resistance of a 2.1 V cell which gives a current of 0.2 A through a resistance of 10 $$\Omega $$ is
A
0.8 $$\Omega $$
B
1.0 $$\Omega $$
C
0.2 $$\Omega $$
D
0.5 $$\Omega $$
4
NEET 2013
MCQ (Single Correct Answer)
+4
-1
A wire of resistance 4 $$\Omega $$ is stretched to twice its original length. The resistance of stretched wire would be
