EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 14 - Magnetic Effect of Current>BITSAT 2018>Q 8

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To increase the current sensitivity of a moving coil galvanometer by $50 %,$ its resistance is increased, so that new resistance becomes twice its initial resistance, by what factor does its voltage sensitivity change?

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Important Questions on Magnetic Effect of Current

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 14 - Magnetic Effect of Current>BITSAT 2017>Q 9

A positive charge

q

is projected in magnetic field of width

\frac{m v}{\sqrt{2} q B}

with velocity

v

. Then, the time taken by charged particle to emerge from the magnetic field is

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 14 - Magnetic Effect of Current>BITSAT 2017>Q 10

A coil in the shape of an equilateral triangle of side

l

is suspended between the pole pieces of a permanent magnet such that

B

is in plane of the coil. If due to a current

i

in the triangle, a torque

τ

rests on it, the side

l

of the triangle is

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 14 - Magnetic Effect of Current>BITSAT 2017>Q 11

What is the magnetic field at the centre of arc in the figure below?

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