AIPMT 2003 | Moving Charges and Magnetism Question 70 | Physics

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

B/2

AIPMT 2002

MCQ (Single Correct Answer)

-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

B/4

B/2

AIPMT 2002

MCQ (Single Correct Answer)

-1

A charge q moves in a region where electric field and magnetic field both exist, then force on it is

$$q\left( {\overrightarrow v \times \overrightarrow B } \right)$$

$$q\overrightarrow E + q\left( {\overrightarrow v \times \overrightarrow B } \right)$$

$$q\overrightarrow E + \overrightarrow q \left( {\overrightarrow B \times \overrightarrow v } \right)$$

$$q\overrightarrow B + \overrightarrow q \left( {\overrightarrow E \times \overrightarrow v } \right)$$

AIPMT 2002

MCQ (Single Correct Answer)

-1

To convert a galvanometer into a voltmeter one should connect a

high resistance in series with galvanometer

low resistance in series with galvanometer

high resistance in parallel with galvanometer

low resistance in parallel with galvanometer.

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