Physics-Magnetism & Electricity at Work (NTSE Stage-1 (State-Level) Scholastic-Aptitude & Language Comprehension): Questions 35 - 40 of 47

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Question number: 35

» Physics » Magnetism & Electricity at Work

MCQ▾

Question

The path of a charged particle moving in a magnetic field can be a

Choices

Choice (4) Response

a.

Circle

b.

Helix

c.

Straight line

d.

All a. , b. and c. are correct

Question number: 36

» Physics » Magnetism & Electricity at Work

MCQ▾

Question

What is increased in step-down transformer?

Choices

Choice (4) Response

a.

Power

b.

Current density

c.

Voltage

d.

Current

Question number: 37

» Physics » Magnetism & Electricity at Work

MCQ▾

Question

A water heater marked Equation is connected to a Equation supply. How long will it take to heat 20 kg of water from Equation ? Assume that all the heat is taken up by the water, (specific heat of water Equation

Choices

Choice (4) Response

a.

28 min

b.

20 min

c.

14 min

d.

41 min

Question number: 38

» 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.

Ammeter is damaged

b.

Voltmeter and Ammeter are damaged

c.

Not are damaged

d.

Voltmeter is damaged

Question number: 39

» 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.

Into the page

b.

Downwards

c.

Upwards

d.

Out of the page

Question number: 40

» Physics » Magnetism & Electricity at Work

MCQ▾

Question

Hysteresis loss for steel is……that for iron.

Choices

Choice (4) Response

a.

Greater than

b.

Less than

c.

Equal to

d.

All of the above

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