Physics (NTSE Stage-1 (State-Level) Scholastic-Aptitude & Language Comprehension): Questions 7 - 11 of 133

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Question number: 7

» Physics » Light

MCQ▾

Question

A point object is placed at a distance of 30 cm from a convex mirror of focal length of 30 cm. The image will form at

Choices

Choice (4) Response

a.

pole

b.

focus

c.

infinity

d.

15 cm behind the mirror

Question number: 8

» Physics » Sound

Assertion-Reason▾

Assertion (Ꭺ)

The velocity of sound in air increases due to the presence of moisture in it.

Reason (Ꭱ)

The presence of moisture in air lowers the density of air.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are false

b.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

c.

Ꭺ is false but Ꭱ is true

d.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

Question number: 9

» 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

Question number: 10

» Physics » Magnetism & Electricity at Work

MCQ▾

Question

Consider the following facts regarding electrons and identify the incorrect statements.

Choices

Choice (4) Response

a.

Relative charge of an electron is -1

b.

Electron was named by stoney

c.

Mass of an electron is 9.11 x 10- 27 g

d.

Charge of an electron is -1.6 × 10 -19 C

Question number: 11

» Physics » Magnetism & Electricity at Work

MCQ▾

Question

A permanent magnet

Choices

Choice (4) Response

a.

attracts magnetic substances and repels all non-magnetic substances

b.

attracts all substances

c.

attracts only magnetic substances

d.

attracts non-magnetic substances and repels magnetic substances

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