1
AIPMT 2015 Cancelled Paper
+4
-1
Across a metallic conductor of non-uniform cross section a constant potential difference is applied. The quantity which remains constant along the conductor is
A
drift velocity
B
electric field
C
current density
D
current
2
AIPMT 2015 Cancelled Paper
+4
-1
A, B and C are voltmeters of resistance R, 1.5 R and 3R respectively as shown in the figure. When some potential difference is applied between X and Y, the voltmeter readings are VA, VB and VC respectively, Then

A
VA = VB $$\ne$$ VC
B
VA $$\ne$$ VB $$\ne$$ VC
C
VA = VB = VC
D
VA $$\ne$$ VB = VC
3
AIPMT 2015 Cancelled Paper
+4
-1
A potentiometer wire has length 4 m and resistance 8 $$\Omega$$. The resistance that must be connected in series with the wire and an accumulator of e.m.f. 2 V, so as to get a potential gradient 1 mV per cm on the wire is
A
44 $$\Omega$$
B
48 $$\Omega$$
C
32 $$\Omega$$
D
40 $$\Omega$$
4
AIPMT 2014
+4
-1
The resistances in the two arms of the meter bridge are 5 $$\Omega$$ and R$$\Omega$$ respectively. When the resistance R is shunted with an equal resistance, the new balance point is at 1.6$$l$$1. The resistance R is

A
10 $$\Omega$$
B
15 $$\Omega$$
C
20 $$\Omega$$
D
25 $$\Omega$$
EXAM MAP
Medical
NEET