AIPMT 2010 Prelims | Moving Charges and Magnetism Question 51 | Physics

A square current carrying loop is suspended in a uniform magnetic field acting in the plane of the loop. If the force on one arm of the loop is the net force on the remaining three arms of the loop is

$$3\overrightarrow F $$

$$-$$ $$\overrightarrow F $$

$$-$$ $$3\overrightarrow F $$

$$\overrightarrow F $$

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 $$\Omega $$

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

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

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

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

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

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