Achieve CUET (UG) Physics Practice Book>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 103

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A toroid has $500$ turns per unit length. If it carries a current of $2 A$ , the magnetic energy density inside the toroid is

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Important Questions on Moving Charges and Magnetism

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Achieve CUET (UG) Physics Practice Book>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 104

A toroid of

n

turns, mean radius

R

and cross-sectional radius

a

carries current

I

. It is placed on a horizontal table taken as

x - y

plane. Its magnetic moment

m

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Achieve CUET (UG) Physics Practice Book>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 105

A solenoid

1.5 m

long and

0.4 cm

in diameter possesses

10

turns per

cm

length. A current of

5 A

flows through it. The magnetic field at the axis inside the solenoid is

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Achieve CUET (UG) Physics Practice Book>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 106

Two solenoids are given -

1^{st}

has

1

turn per unit length and

2^{nd}

has

n

turns per unit length. Ratio of magnetic fields at their centres is

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Achieve CUET (UG) Physics Practice Book>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 107

At any internal point of a solenoid, the value of magnetic field produced depends

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Achieve CUET (UG) Physics Practice Book>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 108

A long solenoid carrying a current produces a magnetic field

B

along its axis. If the current is doubled and the number of turns per

c m

is halved, then the new value of the magnetic field is

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Achieve CUET (UG) Physics Practice Book>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 109

The ratio of the magnetic field in the middle region of a solenoid to that in end region is

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Achieve CUET (UG) Physics Practice Book>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 110

A long solenoid carrying a current $I$ is placed with its axis vertical as shown in the figure. A particle of mass $m$ and charge $q$ is released from the top of the solenoid. Its acceleration is $(g$ being acceleration due to gravity $)$

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Achieve CUET (UG) Physics Practice Book>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 111

When the number of turns in a toroidal coil is doubled, then the value of magnetic flux density will becomes