AIPMT 2005 | Moving Charges and Magnetism Question 66 | Physics

An electron moves in a circular orbit with a uniform speed v. It producess a magnetic field B at the centre of the circle. The radius of the circle is proportional to

$$\sqrt {B/v} $$

$$B/v$$

$$\sqrt {v/B} $$

$$v/B$$

AIPMT 2004

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 wilh galvanometer

low resistance in parallel with galvanometer.

AIPMT 2004

MCQ (Single Correct Answer)

-1

A galvanometer of 50 ohm resistance has 25 divisions. A current of 4 $$ \times $$ 10^$$-$$4 ampere gives a deflection of one division. To convert this galvanometer into a voltmeter having a range of 25 volts, it should be connected with a resistance of

$$2500\,\Omega $$ as a shunt

2450 $$\Omega $$ as a shunt

2550 $$\Omega $$ in series

2450 $$\Omega $$ in series

AIPMT 2003

MCQ (Single Correct Answer)

-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

B/2

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