The number of turns in a coil of Galvanometer is tripled, then

Voltage sensitivity remains constant and current sensitivity increases 3 times

Both voltage and current sensitivity remains constant

Voltage sensitivity increases 3 times and current sensitivity remains constant

Both voltage and current sensitivity decreases by 33 %

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Magnetic field at point $P$ due to given current distribution 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 60

A straight conductor of length

l

carrying a current

I,

is bent in the form of a semicircle. The magnetic field (in tesla) at the centre of the semicircle is

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Achieve CUET (UG) Physics Practice Book>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 61

A non - planar loop of conducting wire carrying a current $I$ is placed as shown in the figure.

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Each of the straight sections of the loop is of length 2a. The magnetic field due to this loop at the point P(a, 0, a) points in the direction.

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Achieve CUET (UG) Physics Practice Book>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 62

The magnetic field at the centre O of the following current loop is:

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Achieve CUET (UG) Physics Practice Book>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 63

In hydrogen atom, the electron is making 6.6

\times 10^{15} r e v s^{- 1}

around the nucleus of radius of 53

Å

. The magnetic field produced at the centre of the orbit is nearly

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Achieve CUET (UG) Physics Practice Book>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 64

If in a circular coil $A$ of radius $R$ , current $I$ is flowing and in another coil $B$ of radius

2 R

a current

2 I

is flowing, then the ratio of the magnetic fields, $B_{a}$ and $B_{b}$ produced by them will be

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Achieve CUET (UG) Physics Practice Book>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 65

The magnetic induction at the centre of a current-carrying circular coil of radius

10 cm

5 \sqrt{5}

times the magnetic induction at a point on its axis. The distance of the point from the centre of the coil in

cm

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Achieve CUET (UG) Physics Practice Book>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 66

The magnetic field at the centre of a current carrying circular loop is

B .

If the radius of the loop is doubled, keeping the current same, the magnetic field at the centre of the loop would be

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Achieve CUET (UG) Physics Practice Book>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 67

An infinitely long straight conductor is bent into the shape as shown below. It carries a current of I ampere and the radius of the circular loop is R metre. Then, the magnitude of magnetic induction at the centre of the circular loop is -

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Magnetic field at point P due to given current distribution is

Important Questions on Moving Charges and Magnetism

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Magnetic field at point $P$ due to given current distribution is