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1
AIPMT 2003
MCQ (Single Correct Answer)
+4
-1
A long solenoid carrying a current producess a magnetic field B along its axis. If the current is doubled and the number of turns per cm is halved, the new value of the magnetic field is
A
B/2
B
B
C
2B
D
4B
2
AIPMT 2002
MCQ (Single Correct Answer)
+4
-1
To convert a galvanometer into a voltmeter one should connect a
A
high resistance in series with galvanometer
B
low resistance in series with galvanometer
C
high resistance in parallel with galvanometer
D
low resistance in parallel with galvanometer.
3
AIPMT 2002
MCQ (Single Correct Answer)
+4
-1
A charge q moves in a region where electric field and magnetic field both exist, then force on it is
A
$$q\left( {\overrightarrow v \times \overrightarrow B } \right)$$
B
$$q\overrightarrow E + q\left( {\overrightarrow v \times \overrightarrow B } \right)$$
C
$$q\overrightarrow E + \overrightarrow q \left( {\overrightarrow B \times \overrightarrow v } \right)$$
D
$$q\overrightarrow B + \overrightarrow q \left( {\overrightarrow E \times \overrightarrow v } \right)$$
4
AIPMT 2002
MCQ (Single Correct Answer)
+4
-1
The magnetic field of given length of wire for single turn coil at its centre is B then its value for two turns coil for the same wire is
A
B/4
B
B/2
C
4B
D
2B
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