1
AIPMT 2015 Cancelled Paper
MCQ (Single Correct Answer)
+4
-1
Change Language
A parallel plate air capacitor of capacitance C is connected to a cell of emf V and then disconnected from it. A dielectric slab of dieletric constant K, which can just fill the air gap of the capacitor, is now inserted in it . Which of the following is incorrect ?
A
The change in energy stored is $${1 \over 2}C{V^2}\left( {{1 \over K} - 1} \right)$$
B
The charge on the capacitor is not conserved.
C
The potential difference between the plates decreases K times.
D
The energy stored in the capaciotor decreases K times.
2
AIPMT 2015 Cancelled Paper
MCQ (Single Correct Answer)
+4
-1
Change Language
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
3
AIPMT 2015 Cancelled Paper
MCQ (Single Correct Answer)
+4
-1
Change Language
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

AIPMT 2015 Cancelled Paper Physics - Current Electricity Question 98 English
A
VA = VB $$ \ne $$ VC
B
VA $$ \ne $$ VB $$ \ne $$ VC
C
VA = VB = VC
D
VA $$ \ne $$ VB = VC
4
AIPMT 2015 Cancelled Paper
MCQ (Single Correct Answer)
+4
-1
Change Language
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 $$\Omega $$
EXAM MAP
Medical
NEETAIIMS
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
Defence
NDA
Staff Selection Commission
SSC CGL Tier I
CBSE
Class 12