1
AIPMT 2015
+4
-1
A circuit contains an ammeter, a battery of 30 V and a resistance 40.8 ohm all connected in series. If the ammeter has a coil of resistance 480 ohm and a shunt of 20 ohm, the reading in the ammeter will be
A
2A
B
1A
C
0.5 A
D
0.25 A
2
AIPMT 2015
+4
-1
A potentiometer wire of length L and a resistance r are connected in series with a battery of e.m.f. E0 and a resistance r1. An unknown e.m.f. E is balanced at a length $$l$$ of the potentiometer wire. The e.m.f. E will be given by
A
$${{{E_0}l} \over L}$$
B
$${{L{E_0}r} \over {\left( {r + {r_1}} \right)l}}$$
C
$${{L{E_0}r} \over {l{r_1}}}$$
D
$${{{E_0}r} \over {\left( {r + {r_1}} \right)}}.{l \over L}$$
3
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
4
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
EXAM MAP
Medical
NEET