JAMB Physics Past Questions & Answers - Page 231

1,151.

The unit of quantity of electricity is called

A.

the ampere

B.

the volts

C.

the coulomb

D.

the ammeter

E.

electromotive force

Correct answer is C

No explanation has been provided for this answer.

1,152.

For a concave mirror to form a teal diminished image, the object must be placed

A.

behind the mirror

B.

between the mirror and its focus

C.

between the focus and the centre of curvature

D.

at the centre of curvature

E.

at a distance greater than the radius of curvature

Correct answer is E

No explanation has been provided for this answer.

1,153.

For correcting long sight defects in the human eye we require a

A.

converging lens

B.

diverging lens

C.

microscope

D.

periscope

E.

plain glass sheet

Correct answer is A

No explanation has been provided for this answer.

1,154.

What volume of alcohol with a density of 8.4 x 102kgm-3 will have the same mass as 4.2m3of petrol whose density is 7.2 x 102kgm-3?

A.

14m3

B.

3.6m3

C.

4.9m3

D.

5.0m3

E.

5.8m3

Correct answer is B

Mass = Density x Volume

4.2 x 7.2 x 102 = v x 8.4 x 102

= 3.6m3

1,155.

For which of the underlisted quantities is the derived unit ML2T2 correct?

i. momentum of a force
ii. work
iii. acceleration

A.

i only

B.

ii only

C.

iii only

D.

i and ii

E.

ii and iii

Correct answer is D

Moment = force x distance

= m x a x d

= kg x \(\frac{m}{s^2}\) x \(\frac{m}{1}\)

= ML2T2