Physics-Magnetism & Electricity at Work (NTSE Stage-1 (State-Level) Scholastic-Aptitude & Language Comprehension): Questions 1 - 6 of 46

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Question number: 1

» Physics » Magnetism & Electricity at Work

MCQ▾

Question

A positive charge enters a uniform magnetic field as shown, what is the direction of the magnetic force?

Positive charge in magnetic field

Positive Charge in Magnetic Field

Find the direction of magnetic force in a uniform magnetic field.

Choices

Choice (4) Response

a.

Out of the page

b.

Upward

c.

Downwards

d.

Into the page

Question number: 2

» Physics » Magnetism & Electricity at Work

MCQ▾

Question

A magnetic wire of dipole moment 4rc Am 2 is bent in the form of semi-circle. The new magnetic moment is

Choices

Choice (4) Response

a.

8 π Am 2

b.

4 Am 2

c.

4π Am 2

d.

None of the above

Question number: 3

» Physics » Magnetism & Electricity at Work

MCQ▾

Question

There are two electric bulbs of 40 W and 100 W. Which one will be brighter when first connected in series and then in parallel?

Choices

Choice (4) Response

a.

40 W in series and 100 W in parallel

b.

100 W in series and 40 W in parallel

c.

40 W both in series and parallel will be uniform

d.

100 W both in series and parallel will be uniform

Question number: 4

» Physics » Magnetism & Electricity at Work

MCQ▾

Question

If a 0.1 % length is increased due to stretching, then the percentage increase in its resistance will be

Choices

Choice (4) Response

a.

0.2%

b.

1 %

c.

0.1 %

d.

2 %

Question number: 5

» Physics » Magnetism & Electricity at Work

MCQ▾

Question

Tendency of an atom in a molecule to attract the shared pair of electron towards itself is known as

Choices

Choice (4) Response

a.

electronegativity (EN)

b.

valency

c.

ionisation energy (i.e.)

d.

electron-affinity (EA)

Question number: 6

» Physics » Magnetism & Electricity at Work

MCQ▾

Question

By mistake a voltmeter is connected in series and an ammeter is connected in parallel with a resistance in an electrical circuit. What will happen to the instruments?

Choices

Choice (4) Response

a.

Voltmeter is damaged

b.

damaged

c.

Ammeter is damaged

d.

None of the above

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