Magnetic Effects of Current and Magnetism (KVPY Stream SB-SX (Class 12 & 1st Year BSC) Physics): Questions 1 - 3 of 10

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Question number: 1

» Magnetic Effects of Current and Magnetism » Cyclotron

Appeared in Year: 2010

MCQ▾

Question

A charged particle of charge q and mass m, gets deflected through an angle θ upon passing through a square region of side ‘a’ which contains a uniform magnetic field B normal to its plane. Assuming that the particle entered the square at right angles to one side, what is the speed of the particle?

Choices

Choice (4) Response
a.

qBmacotθ

b.

qBmacot2θ

c.

qBmatanθ

d.

qBmatan2θ

Question number: 2

» Magnetic Effects of Current and Magnetism » Biot - Savart Law

Appeared in Year: 2012

MCQ▾

Question

A loop carrying current Ι has the shape of a regular polygon of n sides. If R is the distance from the centre to any vertex, then the magnitude of the magnetic induction vector B at the centre of the loop is –

Choices

Choice (4) Response
a.

nμ0I2πRtan2πn

b.

nμ0I2πRtanπn

c.

μ0IπRtanπn

d.

μ0I2R

Question number: 3

» Magnetic Effects of Current and Magnetism » Biot - Savart Law

Appeared in Year: 2013

MCQ▾

Question

An arrangement with a pair of quarter circular coils of radii r and R with a common centre C and carrying a current (I) are shown.

An arrangement with a pair of quarter circular coils

An Arrangement With a Pair of Quarter Circular Coils

Figure shows an arrangement with a pair of quarter circular coils of radii r and R with common centre C and it carrying current (I).

The permeability of free space is μ0. The magnetic field at C is –

Choices

Choice (4) Response
a.

μ0I8(1r+1R) out of the page

b.

μ0I8(1r1R) into the page

c.

μ0I8(1r1R) out of the page

d.

μ0I8(1r+1R) into the page

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