Beta Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise (Previous Year Questions)>Q 64

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A circular coil of $‘ N ’$ turns, $‘ R ’$ radius carries a $‘ i ’$ current. Work done in rotating this coil in an external magnetic field from $θ_{1} = 0 º$ to $θ_{2}$ $= 90 °$ :-

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Important Questions on Magnetic Effect of Current

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Beta Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise (Previous Year Questions)>Q 65

A short bar magnet placed with its axis at

30 º

with uniform magnetic field of

0.16 T,

experiences a torque of magnitude

0.032 N - m

. The potential energy of bar magnet in stable equilibrium and in unstable equilibrium respectively:-

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Beta Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise (Previous Year Questions)>Q 66

Magnetic moment and angular momentum of an orbital electron are

’ M ’

and

L

respectively. The specific charge of the orbital electron:

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Beta Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise (Previous Year Questions)>Q 67

A particle of charge

’ q ’

and mass

’ m ’

is moving in a circular orbit with angular speed '

ω

'. The ratio of its magnetic moment to that of its angular momentum depends on:-

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Beta Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise (Previous Year Questions)>Q 68

Magnetic moment of orbital electron in first orbit is

µ_{B}

then magnetic moment of that electron in third orbit :-

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Beta Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise (Previous Year Questions)>Q 69

A solenoid of radius

R

and length

L

has a current

I = I_{0} \cos ω t .

The value of induced electric field at a distance of

r

outside the solenoid, is

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Beta Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise (Analytical Questions)>Q 1

A helium nucleus is moving in a circular path of radius 0.8m. If it takes 2 sec to complete one revolution. Magnetic field produced at the centre of the circle :-

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Beta Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise (Analytical Questions)>Q 2

A cell of an emf of,

2 V

and internal resistance of

0.5 Ω

is sending current through a tangent galvanometer of resistance,

4.5 Ω

. If another external resistance of

95 Ω

is introduced, the deflection of the galvanometer is,

45 º

. The reduction factor of the galvanometer is:-

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Beta Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise (Analytical Questions)>Q 3

A stationary magnet does not interact with:-