Physics Crash Course MHT-CET>Chapter 16 - Magnetic Effect of Electric Current>Exercise 1>Q 119

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A conducting wire carrying current is arranged as shown. The magnetic field at $O$

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Important Questions on Magnetic Effect of Electric Current

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Physics Crash Course MHT-CET>Chapter 16 - Magnetic Effect of Electric Current>Exercise 1>Q 120

Two current-carrying coils have radii

r

and

2 r

and have the same magnetic induction at their centres. The ratio of voltages applied across them is

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Physics Crash Course MHT-CET>Chapter 16 - Magnetic Effect of Electric Current>Exercise 1>Q 121

The electron in the hydrogen atom circles around the proton with a speed of

2.2 \times 10^{6} m s^{- 1}

in an orbit of radius

5 \times 10^{- 11} m

, what is the magnitude of the magnetic field produced at the proton?

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Physics Crash Course MHT-CET>Chapter 16 - Magnetic Effect of Electric Current>Exercise 1>Q 122

The magnetic field due to a current carrying circular loop of radius

6 cm

at a point on the axis at a distance of

8 cm

from the centre is

108 μ T .

What will be its value at the centre of the loop?

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Physics Crash Course MHT-CET>Chapter 16 - Magnetic Effect of Electric Current>Exercise 1>Q 123

The field normal to the plane of a wire of

15 turns

and radius

r

which carries a current

1 A

is measured on the axis of the coil at a small distance

d

from the centre of the coil. This is smaller than the field at the centre by the fraction

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Physics Crash Course MHT-CET>Chapter 16 - Magnetic Effect of Electric Current>Exercise 1>Q 124

The magnetic field on the axis of a circular current carrying conductor of radius

r

at a distance

r

from centre is

B_{a}

and the magnetic field at its centre is

B_{c}

. The value of

B_{a} : B_{c}

is

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Physics Crash Course MHT-CET>Chapter 16 - Magnetic Effect of Electric Current>Exercise 1>Q 127

A current-carrying coil represents

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Physics Crash Course MHT-CET>Chapter 16 - Magnetic Effect of Electric Current>Exercise 1>Q 128

The current carrying loop behaves as a magnetic dipole because,

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Physics Crash Course MHT-CET>Chapter 16 - Magnetic Effect of Electric Current>Exercise 1>Q 130

A toroid has a core of inner radius

20 cm

and outer radius

22 cm

around which

3000

turns of wire are wound. If the current in the wire is

10 A,

the field along the axis at distance of

2 m

from the centre is given by