Physics (NTSE Stage-1 (State-Level) Scholastic-Aptitude & Language Comprehension): Questions 31 - 36 of 133

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Question number: 31

» Physics » Magnetism & Electricity at Work

MCQ▾

Question

A current of 0.5 A is drawn by a filament of an electric bulb for half an hour. What is the amount of electric charge that flows through the circuit?

Choices

Choice (4) Response

a.

900°C

b.

9°C

c.

5°C

d.

600°C

Question number: 32

» Physics » Motion and Force

MCQ▾

Question

A rider on horseback falls when horse starts running all of a sudden because

Choices

Choice (4) Response

a.

inertia of rest keeps the upper part of body at rest whereas lower part of the body moves forward with the horse

b.

rider is taken back

c.

rider is suddenly afraid of falling

d.

All of the above

Question number: 33

» Physics » Motion and Force

MCQ▾

Question

A particle is moving on a circular path with constant speed, and then its acceleration will be

Choices

Choice (4) Response

a.

external radial acceleration

b.

internal radial acceleration

c.

zero

d.

constant acceleration

Question number: 34

» Physics » Motion and Force

MCQ▾

Question

In case of uniform circular motion, which of the following physical quantity does not remain constant?

Choices

Choice (4) Response

a.

Mass

b.

Speed

c.

Momentum

d.

Kinetic energy

Question number: 35

» Physics » Motion and Force

MCQ▾

Question

When a body moves with a constant speed along a circle

Choices

Choice (4) Response

a.

no force acts on the body

b.

no acceleration is produced in the body

c.

no work is done on it

d.

its velocity remains constant

Question number: 36

» Physics » Magnetism & Electricity at Work

MCQ▾

Question

A water heater marked 2 kW, 220 V is connected to a 220 V supply. How long will it take to heat 20 kg of water from 10°C to 30°C? Assume that all the heat is taken up by the water, (specific heat of water = 4200 J kg- 2 C- 2)

Choices

Choice (4) Response

a.

14min

b.

28 min

c.

41 min

d.

20min

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