1
AIPMT 2001
MCQ (Single Correct Answer)
+4
-1
If number of turns, area and current through a coil is given by n, A and $$i$$ respectively then its magnetic moment will be
A
$$niA$$
B
$${n^2}iA$$
C
$$ni{A^2}$$
D
$${{ni} \over {\sqrt A }}$$
2
AIPMT 2001
MCQ (Single Correct Answer)
+4
-1
An electron having mass m and kinetic energy E anter in uniform magnetic field B perpendiculaly, then its frequency will be
A
$${{eE} \over {qvB}}$$
B
$${{2\pi m} \over {eB}}$$
C
$${{eB} \over {2\pi m}}$$
D
$${{2m} \over {eBE}}$$
3
AIPMT 2000
MCQ (Single Correct Answer)
+4
-1
The magnetic field at centre, P will be

AIPMT 2000 Physics - Moving Charges and Magnetism Question 20 English
A
$${{{\mu _0}} \over {4\pi }}$$
B
$${{{\mu _0}} \over {\pi }}$$
C
$${{{\mu _0}} \over {2\pi }}$$
D
$$4{\mu _0}\pi $$
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