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JAMB Physics Past Questions & Answers - Page 214

1,066.

Longitudinal waves do not exhibit

Refraction

Reflection

Diffraction

Polarization

Rarefaction

View answer & explanation

Correct answer is D

No explanation has been provided for this answer.

1,067.

The specific latent heat of vaporization of a substance is always?

less than its specific latent heat of fusion

greater than its specific heat of fusion

equal to its specific latent heat of fusion

all of the above depending on the nature of the substance

none of the above

View answer & explanation

Correct answer is B

No explanation has been provided for this answer.

1,068.

If the force of a charge of 0.2 coulomb in an electric field is 4N, then the electric field intensity of the field is

0.8

0.8N/C

20.0N/C

4.2N/C

View answer & explanation

Correct answer is C

Field intensity = $\frac{force}{charge}$

$\frac{4}{0.2}$ = 20N/C

1,069.

The speed of light in vacuum is 3.0 x 108ms^-1. If the refractive index of a transparent liquid is $\frac{4}{3}$ , then the speed of light in the liquid is

0.44 x 10 ⁸ms^-1

2.25 x 10 ⁸ms^-1

3.0 x 10 ⁸ms^-1

4.0 x 10 ⁸ms^-1

4.33 x 10 ⁸ms^-1

View answer & explanation

Correct answer is B

n = $\frac{\text{speed in air }}{\text{speed in water }}$

$\frac{4}{3}$ = $\frac{3 \times 10^8}{v}$

v = 2.25 x 10⁸ms^-1

1,070.

Which of the following best describes the energy changes which take place when a steam engine drives a generator which lights a lamp?

heat $\to$ light $\to$ sound $\to$ kinetic

kinetic $\to$ light $\to$ heat $\to$ electricity

heat $\to$ kinetic $\to$ electricity $\to$ heat $\to$ light

electricity $\to$ kinetic $\to$ heat $\to$ light

heat $\to$ sound $\to$ kninetic $\to$ electricity

View answer & explanation

Correct answer is C

No explanation has been provided for this answer.

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