Processing math: 100%

JAMB Physics Past Questions & Answers - Page 245

1,221.

A ray of light is incident at an angle of 30^o on one top surface of a parallel-sided glass block of refractive index 1.5. The ray finally emerges from the lower surface. What is the angular deviation of the emergent ray?

60^o

39^o

28^o

0^o

View answer & explanation

Correct answer is D

No explanation has been provided for this answer.

1,222.

A pool of water appears to be 1.0m deep when viewed vertically from above. If the refractive index of water is 1.33, what is the actual depth of the pool?

0.750m

1.013m

1.330m

13.3000m

View answer & explanation

Correct answer is C

n = $\frac{\text {real depth}}{\text{apparent depth}}$

1.33 = $\frac{\text {real depth}}{1}$

real depth = 1.33cm

1,223.

An object 3.0cm high is placed 60.0cm from a converging lens whose focal length is 20.0cm. Calculate the size of the image formed

0.5cm

1.5cm

2.0cm

6.0cm

View answer & explanation

Correct answer is B

F = $\frac{UV}{U + V}$

20 = $\frac{60 \times V}{60 + V}$

V = 30cm

similarly, $\frac{U}{V}$ = $\frac{\text{height of object}}{\text{height of image}}$

$\frac{60}{30}$ = $\frac{3}{h}$

h = 1.5cm

1,224.

If an object is placed in front of two mirrors inclined at 90^o, how many images will be formed?

five

four

three

two

View answer & explanation

Correct answer is C

n = $\frac{360}{\theta}$ - 1

= 360 - 1

= 3 images

1,225.

When the length I of a piece of wire under constant tension is varied, the relationship of the frequency of the vibration f $\alpha$ / is

f $\alpha$ /

f $\alpha \frac{1}{I^2}$

f $\alpha\sqrt I$

f $\alpha \frac{1}{1}$

View answer & explanation

Correct answer is D

F = $\frac{1}{2L}\sqrt\frac{T}{m}$

JAMB Subjects

Literature in English

Islamic Religious Knowledge

Christian Religious Knowledge

Aptitude Tests

Situational Judgement Questions and Answers

Quantitative Reasoning Questions and Answers

Puzzles Questions and Answers

Nigeria General Knowledge Questions and Answers

Typing Speed and Accuracy Test

Abstract Reasoning Questions and Answers

Spatial Reasoning Questions and Answers

Personality Test

Verbal Reasoning Questions and Answers

Numerical Reasoning Questions and Answers

Logical Reasoning Questions and Answers

Data Interpretation Questions and Answers

Microsoft Office Questions and Answers

See all →

View latest jobs in Nigeria today