1
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
2
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 $$\Omega $$
3
AIPMT 2015 Cancelled Paper
MCQ (Single Correct Answer)
+4
-1
Change Language
An electron moving in a circular orbit of radius r makes n rotations per second. The magnetic field produced at the centre has magnitude
A
$${{{\mu _0}{n^2}e} \over r}$$
B
$${{{\mu _0}ne} \over {2r}}$$
C
$${{{\mu _0}ne} \over {2\pi r}}$$
D
Zero
4
AIPMT 2015 Cancelled Paper
MCQ (Single Correct Answer)
+4
-1
Change Language
A conducting square frame of side 'a' and a long straight wire carrying current $$I$$ are located in the same plane as shown in the figure. The frame moves to the right with a constant velocity 'V'. The emf induced in the frame will be proportional to

AIPMT 2015 Cancelled Paper Physics - Moving Charges and Magnetism Question 64 English
A
$${1 \over {{{\left( {2x + a} \right)}^2}}}$$
B
$${1 \over {\left( {2x - a} \right)\left( {2x + a} \right)}}$$
C
$${1 \over {{x^2}}}$$
D
$${1 \over {{{\left( {2x - a} \right)}^2}}}$$
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