NECO Past Questions and Answers - Page 217

1,081.

A body of mass 40g loses 80J of heat energy. If the specific heat capacity of the body is 400 Jkg^-1, calculate the change in temperature of the body.

A.

0.2K

B.

0.4K

C.

2.0K

D.

5.0K

E.

10.0K

View answer & explanation

Correct answer is D

No explanation has been provided for this answer.

1,082.

Which of the statements about prism binoculars is/are correct? They

I. are a pair of two telescopes mounted side by side
II. reduce the optical path of the light ray from the objective to the eye piece
III, present inverted and diminished image to the viewer
IV. present erect and magnified image to the viewer.

A.

I only

B.

II only

C.

I and II only

D.

I, II and IV only

E.

II, III and IV only

View answer & explanation

Correct answer is D

No explanation has been provided for this answer.

1,083.

How far from a hill should a boy stand to hear the echo of his clap 1 .6s later? [Speed of sound in air is 340ms^-1]

A.

186m

B.

272m

C.

544m

D.

1088m

E.

2000m

View answer & explanation

Correct answer is B

No explanation has been provided for this answer.

1,084.

Which of the following conclusion(s) can be drawn from Newton’s second law of motion? Force is proportional to

I. the product of mass and acceleration
II. the product of mass and velocity
III. Impulse

A.

I only

B.

II only

C.

III only

D.

II and III only

E.

I, II and III

View answer & explanation

Correct answer is E

No explanation has been provided for this answer.

1,085.

A voltage supply of 12V r.m.s. and frequency 90Hz is connected to a 4 ω resistor. Calculate the peak value of the current

A.

48.8 A

B.

30.0 A

C.

27.5 A

D.

4.2 A

E.

3.0A

View answer & explanation

Correct answer is D

No explanation has been provided for this answer.

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