AIPMT 2010 Mains | Moving Charges and Magnetism Question 46 | Physics

AIPMT 2010 Mains

MCQ (Single Correct Answer)

-1

A closely wound solenoid of 2000 turns and area of cross-section 1.5 $$ \times $$ 10^$$-$$4 m² carries a current of 2.0 A. It is suspended through its centre and perpendicular to its length, allowing it to turn in a horizontal plane in a uniform magnetic field 5 $$ \times $$ 10^$$-$$2 tesla making an angle of 30^o with the axis of the solenoid. The torque on the solenoid will be

3 $$ \times $$ 10^$$-$$3 N m

1.5 $$ \times $$ 10^$$-$$3 N m

1.5 $$ \times $$ 10^$$-$$2 N m

3 $$ \times $$ 10^$$-$$2 N m

AIPMT 2010 Prelims

MCQ (Single Correct Answer)

-1

Charge q is uniformly spread on a thin ring of radius R. The ring rotates about its axis with a uniform frequency $$f$$ Hz. The magnitude of magnetic induction at the center of the ring is

$${{{\mu _0}qf} \over {2\pi R}}$$

$${{{\mu _0}qf} \over {2R}}$$

$${{{\mu _0}q} \over {2fR}}$$

$${{{\mu _0}q} \over {2\pi fR}}$$

AIPMT 2010 Prelims

MCQ (Single Correct Answer)

-1

A galvanometer has a coil of resistance 100 ohm and gives a full scale deflection for 30 mA current. If it is to work as a voltmeter of 30 volt range, the resistance required to be added will be

900 $$\Omega $$

1800 $$\Omega $$

500 $$\Omega $$

1000 $$\Omega $$

AIPMT 2010 Prelims

MCQ (Single Correct Answer)

-1

A galvanometer has a coil of resistance 100 ohm and gives a full scale deflection for 30 mA current. If it is to work as a voltmeter of 30 volt range, the resistance required to be added will be

900 $$\Omega $$

1800 $$\Omega $$

500 $$\Omega $$

1000 $$\Omega $$

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