Processing math: 100%

JAMB Physics Past Questions & Answers - Page 276

1,376.

A man hears his echo from a nearby hill 2s after he shouted. If the frequency of his voice is 260Hz and the wavelength is 1.29m, how far away is the hill?

330.0m

335.4m

660.0m

670.8m

View answer & explanation

Correct answer is B

v = $\lambda$ F

260 x 1.29 =335.4ms^-1

Echo time = $\frac{2}{2}$ = 1sec.

distance = v x t

= 335.4 x 1 = 335.4m

1,377.

Two tuning forks of frequency 256Hz and 260Hz are sounded close to each other. What is the frequency of the beats produced?

2Hz

4Hz

8Hz

258Hz

View answer & explanation

Correct answer is B

F = F₂ - F₁

= 260 - 256

= 4Hz

1,378.

Which of the following correctly, describes the image of an object, 4cm from a diverging lens of focal length 12cm?

The image is virtual, 3cm in front of the lens

The image is real, 6cm behind the lens

The image is virtual, 6cm in front of the lens

The image is real, 3cm in front the lens

View answer & explanation

Correct answer is A

F = $\frac{uv}{u + v}$

F = -ve

-12 = $\frac{4 \times v}{4 + v}$

v = -3cm

1,379.

In a ray diagram for a thin converging lens, a ray that is not parallel to the optic axis but passes through the optic center will

pass through undeviated

pass through the center of curvature after refraction

emerge parallel to the principal axis

pass through the principal focus after refraction

View answer & explanation

Correct answer is A

No explanation has been provided for this answer.

1,380.

A trough 12.0cm deep is filled with water of refractive index $\frac{4}{3}$ . By how much would a coin at the bottom of the trough appear to be displaced when viewed vertically from above the water surface?

3.0cm

6.0cm

9.0cm

16.0cm

View answer & explanation

Correct answer is A

$\frac{4}{3}$ = $\frac{12}{\text {Apparent depth}}$

Apparent depth = 9cm

Height by which coin is raised = 12 - 9

= 3cm

JAMB Subjects

Literature in English

Islamic Religious Knowledge

Christian Religious Knowledge

Aptitude Tests

Personality Test

Numerical Reasoning Questions and Answers

Typing Speed and Accuracy Test

Verbal Reasoning Questions and Answers

Nigeria General Knowledge Questions and Answers

Spatial Reasoning Questions and Answers

Microsoft Office Questions and Answers

Puzzles Questions and Answers

Data Interpretation Questions and Answers

Quantitative Reasoning Questions and Answers

Logical Reasoning Questions and Answers

Situational Judgement Questions and Answers

Abstract Reasoning Questions and Answers

See all →

View latest jobs in Nigeria today