# Physics-Magnetism & Electricity at Work (NTSE Stage-1 (State-Level) Scholastic-Aptitude & Language Comprehension): Questions 36 - 41 of 47

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

### 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?

### 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

## Question number: 41

» Physics » Magnetism & Electricity at Work

MCQ▾

### Question

A wire of resistance R is elongated n-fold to make a new uniform wire. The resistance of new wire

### Choices

Choice (4) Response

a.

b.

c.

d.

f Page