NECO Physics Past Questions & Answers - Page 6

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52.

The term torque means

A.

the equilibrant of two concurrent forces

B.

the moment of a force about an ads

C.

the resultant of several forces acting on a body in equilibrium

D.

two coplanar forces at right angle to each other

E.

two equal and opposite forces whose lines of action do not coincide

Correct answer is B

No explanation has been provided for this answer.

53.

Inertia is the property of a body which makes the body to

A.

accelerate

B.

be reluctant to move when at rest

C.

experience friction when moving

D.

move randomly

E.

retard

Correct answer is B

No explanation has been provided for this answer.

54.

A projectile attains its maximum height when the angle of projection is?

A.

30°

B.

45°

C.

60°

D.

75°

E.

90°

Correct answer is E

Range R is maximum for angle of projection of 45º.

Maximum height is achieved with an angle of 90

55.

A stone is thrown with a speed of 10ms at an angle of 30° to the horizontal, Calculate its time of flight, (g = 10ms2)

A.

0.5s

B.

1.0s

C.

1.7s

D.

2.0s

E.

3.4s

Correct answer is B

No explanation has been provided for this answer.

56.
57.

Which of the following phenomena is responsible for the spherical shape of soap bubbles?

A.

Adhesion

B.

Capillarity

C.

Cohesion

D.

Osmosis

E.

Surface tension

Correct answer is E

No explanation has been provided for this answer.

58.

Which of the following pairs of phenomena helps in the resolution of the wave-particle paradox of matter?

A.

Compton effect and thermionic emission

B.

Electron diffraction and refraction

C.

emission and absorption of light

D.

Interference and polarization

E.

Reflection and photoelectric effect

Correct answer is C

No explanation has been provided for this answer.

59.

The defect of the eye lens which occurs as a result of weak ciliary muscles is called

A.

astigmatism

B.

hypermetropia

C.

myopia

D.

presbyopia

E.

spherical aberration

Correct answer is D

No explanation has been provided for this answer.

60.

Two forces of magnitude 8N and 4N act at right angle to each other. The angle between the resultant and the 8N force is

A.

23.9°

B.

26.6°

C.

29.5°

D.

60.0°

E.

63.4°

Correct answer is B

No explanation has been provided for this answer.