NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 602 - 605 of 2184

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Question number: 602

» Magnetic Effects of Current and Magnetism » Para, Dia and Ferro-Magnetic Substances

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MCQ▾

Question

The universal property of all substances is

Choices

Choice (4) Response

a.

Paramagnetic

b.

Ferromagnetism

c.

Diamagnetism

d.

all

Question number: 603

» Magnetic Effects of Current and Magnetism » Bar Magnet

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MCQ▾

Question

The ratio of intensities, of magnetic field, at distances x and 2x from the center of magnet of length 2cm on its axis, will be

Choices

Choice (4) Response

a.

4: 1

b.

4: 1 approx.

c.

8: 1

d.

8: 1 approx

Question number: 604

» Electromagnetic Induction & Alternating Currents » Faraday's Law

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MCQ▾

Question

A thin semicircular conducting ring of radius R is falling with its plane vertical in a horizontal magnetic induction B. At the position MNQ shown in the fig, the speed of the ring is V. The potential difference developed across the semicircular ring is,

A thin semicircular ring in magnetic field

A Thin Semicircular Ring in Magnetic Field

A thin semicircular conducting ring of radius R is falling with its plane vertical in a horizontal magnetic induction B at the position MNQ shown in the figure.

Choices

Choice (4) Response

a.

and M is at higher potential

b.

Zero

c.

2RBV and Q is at higher potential

d.

π RBV and Q is at higher potential

Question number: 605

» Magnetic Effects of Current and Magnetism » Bar Magnet

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MCQ▾

Question

A short bar magnet of magnetic moment 5.25 x 10 -2 JT -1 is placed with its axis perpendicular to the earth’s field direction. Magnitude of the earth’s field at the place is given to be 0.42 G. Ignore the length of the magnet in comparison to the distance involved. Then,

(1) The distance from the center of the magnet on its normal bisector at which the resultant field is inclined at 45° with the earth’s field is 5 cm

(2) The distance from the center of the magnet on its axis at which the resultant field inclined at 45° with the earth’s field is 6.3 cm

(3) The distance from the center of the magnet on its normal bisector at which the resultant field inclined at 45° with the earth’s field is 8.3 cm

(4) The distance from the center of the magnet on its axis at which the resultant field inclined at 45° with the earth’s field is 8 cm

Select the correct answers and mark it according to the following codes:

Choices

Choice (4) Response

a.

1,2 and 3 are correct

b.

1 and 2 are correct

c.

1 and 3 are correct

d.

2 and 4 are correct