NEET 2018 | Moving Charges and Magnetism Question 23 | Physics

A metallic rod of mass per unit length 0.5 kg m^–1 is lying horizontally on a smooth inclined plane which makes an angle of 30° with the horizontal. The rod is not allowed to slide down by flowing a current through it when a magnetic field of induction 0.25 T is acting on it in the vertical direction. The current flowing in the rod to keep it stationary is

7.14 A

5.98 A

14.76 A

11.32 A

NEET 2018

MCQ (Single Correct Answer)

-1

Current sensitivity of a moving coil galvanometer is 5 div/mA and its voltage sensitivity (angular deflection per unit voltage applied) is 20 div/V. The resistance of the galvanometer is

40 $$\Omega $$

25 $$\Omega $$

250 $$\Omega $$

500 $$\Omega $$

NEET 2017

MCQ (Single Correct Answer)

-1

An arrangement of three parallel straight wires placed perpendicular to plane of paper carrying same current $$'I'$$ along the same direction as shown in fogure. Magnitude of force per unit length on the middle wire $$'B'$$ is given by

NEET 2017 Physics - Moving Charges and Magnetism Question 76 English

NEET 2017 Physics - Moving Charges and Magnetism Question 76 English

$${{2{\mu _0}{I^2}} \over {\pi d}}$$

$${{\sqrt 2 {\mu _0}{I^2}} \over {\pi d}}$$

$${{{\mu _0}{I^2}} \over {\sqrt 2 \pi d}}$$

$${{{\mu _0}{I^2}} \over {2\pi d}}$$

NEET 2016 Phase 2

MCQ (Single Correct Answer)

-1

An electron is moving in a circular path under the influence of a transverse magnetic field of 3.57 $$ \times $$ 10^-2 T. If the value of e/m is 1.76 $$ \times $$ 10¹¹ C kg^$$-$$1, the frequency of revoluation of the electron is

1 GHz

100 MHz

62.8 MHz

6.28 MHz

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