WAEC Physics Past Questions & Answers - Page 227

1,131.

The relationship between the directions of magnetic field, the current-carrying wire in the field is easily remembered using

A.

Octet rule

B.

Right hand grip rule

C.

Maxwell’s screw rule

D.

Ampere’s swimming rule

E.

Fleming’s left hand rule

Correct answer is E

No explanation has been provided for this answer.

1,132.

Lenz’s law of electromagnetic induction is essentially a statement of the

A.

Inverse square law of gravitation

B.

Inverse square law of magnetism

C.

Inverse square law of electrostatics

D.

Law of conservation of momentum

E.

Law of conservation of energy

Correct answer is E

No explanation has been provided for this answer.

1,133.

The odor of a leaking gas is perceived at a distance from the source. This is made possible by the process of

A.

Sublimation

B.

Diffusion

C.

Osmosis

D.

Evaporation

E.

Capillarity

Correct answer is E

No explanation has been provided for this answer.

1,134.

The half-life of a radioactive material is 6hrs. What quantity of 1kg of the material would decay in 24 hours?

A.

15/16kg

B.

1/2kg

C.

1/4kg

D.

1/8kg

E.

1/16kg

Correct answer is E

No explanation has been provided for this answer.

1,135.

When a paint brush is removed from clean water, the bristles of the brush are pulled together because of

A.

The viscosity of the surrounding air

B.

The low density of water

C.

Surface tension forces

D.

The weight of the brush bristles

E.

The mass of the brush bristles

Correct answer is C

No explanation has been provided for this answer.