EASY
BITSAT
IMPORTANT
Earn 100

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

(a)
(b)
(c)
(d)

42.86% studentsanswered this correctly

Important Questions on Magnetic Effect of Current
EASY
BITSAT
IMPORTANT
An electron revolves in a circular orbit of radius with angular speed . The magnetic field at the centre of electron orbit is

MEDIUM
BITSAT
IMPORTANT
The magnetic field at the centre of the current-carrying square loop shown in the figure is

MEDIUM
BITSAT
IMPORTANT
A proton is revolving on a circular path of radius with frequency . Magnetic dipole moment associated with proton is

EASY
BITSAT
IMPORTANT
An ammeter of resistance can measure currents upto . The value of shunt resistance to measure current upto is

EASY
BITSAT
IMPORTANT
A current flows through a loop as shown in figure. The magnetic field at the Centre is


EASY
BITSAT
IMPORTANT
The ratio of angular momentum to the atomic dipole moment for hydrogen like atoms and ions is

MEDIUM
BITSAT
IMPORTANT
A copper rod of mass slides under gravity on two smooth parallel rails distance apart and set an angle to the horizontal. At the bottom, the rails are joined by a resistance in figure. There is a uniform magnetic field perpendicular to the plane of the rails. The terminal velocity of rod is

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