NECO Past Questions and Answers - Page 197

981.

The charge of an alpha particle can be neutralized by

A.

1 beta particle

B.

2 photons of gamma rays

C.

2 beta particles

D.

4 beta particles

E.

4 photons of gamma rays

View answer & explanation

Correct answer is C

No explanation has been provided for this answer.

982.

Which of the following is used for shielding radioactive fallout?

A.

Aluminum

B.

Lead

C.

Iron

D.

Plastic

E.

Wood

View answer & explanation

Correct answer is B

No explanation has been provided for this answer.

983.

Which of the following statements is/are correct in any machine?

I. The velocity ratio is usually greater than the mechanical advantage.
II. Efficiency work inputwork outputIII. The velocity ratio is independent of friction.

A.

I only

B.

III only

C.

I and II only

D.

I and III only

E.

II and III only

View answer & explanation

Correct answer is D

No explanation has been provided for this answer.

984.

An object of mass 5.0 cg moving with a velocity of 12ms^-1 due north hits a stationary body of mass 7.0kg. If they stick together after collision and move with velocity V due north, calculate the magnitude of V.

A.

12ms^-1

B.

7ms^-1

C.

6ms^-1

D.

5ms^-1

E.

4ms^-1

View answer & explanation

Correct answer is D

No explanation has been provided for this answer.

985.

Which of the following is NOT a component of an a.c. generator?

A.

Armature

B.

Carbon brushes

C.

Magnet

D.

Slip ring

E.

Split rings

View answer & explanation

Correct answer is E

No explanation has been provided for this answer.

NECO Subjects

English Language

Agricultural Science

Physical Education

Further Mathematics

Literature in English

Islamic Religious Knowledge

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