# Physics (NTSE Stage-2 (National-Level) Scholastic-Aptitude & Language Comprehension): Questions 20 - 23 of 78

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## Question number: 20

» Physics » Measurement

MCQ▾

### Question

The value of 25°C on Fahrenheit scale is

### Choices

Choice (4) Response

a.

35°C

b.

22°F

c.

25°F

d.

77°F

## Question number: 21

» Physics » Magnetism & Electricity at Work

MCQ▾

### Question

Both electromagnets (A) and (B) consist of a coil of insulated wire wrapped around an iron core. Then,

### Choices

Choice (4) Response

a.

electromagnet (A) has more strength of magnetic field

b.

electromagnet (B) has more strength of magnetic field

c.

Data insufficient

d.

electromagnets (A) and (B) have same strength of magnetic field

## Question number: 22

» Physics » Light

MCQ▾

### Question

Two plane mirrors are inclined to each other at an angle of 90° as shown in figure. A ray of light falls on the mirror M 1 at angle 60° and after reflection, falls on the other mirror M 2 from which it get reflected by angle i. The value of third angle is?

### Choices

Choice (4) Response

a.

60°

b.

90°

c.

70°

d.

30°

## Question number: 23

» Physics » Motion and Force

MCQ▾

### Question

What is the average speed between time 4 min and 20 min?

### Choices

Choice (4) Response

a.

b.

c.

d.