JAMB Physics Past Questions & Answers - Page 145

721.

The amount of heat required to raise the temperature of a body is

A.

Thermal energy

B.

thermal conduction

C.

heat loss

D.

specific heat capacity

E.

thermal capacity

Correct answer is E

No explanation has been provided for this answer.

722.

A concave lens of focal length 20cm form an image 1/2 the size of the object. The object distance is

A.

100cm

B.

\( \frac{100}{q} \)

C.

60cm

D.

\( \frac{60}{7} \)

E.

None of the above

Correct answer is C

No explanation has been provided for this answer.

723.

In a radioactive series

\( ^{235} _{92}L \to ^{235} _{92}M \to ^{231} _{90}N \to ^{231} _{91}\phi \)

The particles emitted are respectively

A.

\( \beta , \beta , \alpha \)

B.

\( \alpha , \gamma , \beta \)

C.

\( \gamma , \alpha , \beta \)

D.

\( \alpha , \alpha , \beta \)

E.

\( \beta , \alpha , \beta \)

Correct answer is C

No explanation has been provided for this answer.

724.

Which of the following may be used to determine the relative humidity in a physics laboratory

I. Manometer
II. Wet-and-Dry Bulb Hygrometer
III. Hair Hygrometer
IV. A Hydrometer

A.

I Only

B.

II and III Only

C.

II Only

D.

III Only

E.

II,III and IV Only

Correct answer is B

No explanation has been provided for this answer.

725.

A simple pendulum, 0.6m long, has a period of 1.5s. What is the period of a similar pendulum of 0.4m length in the same location?

A.

\( 1.5 \frac{ \sqrt{2}}{3} \)s

B.

\( 1.5 \frac{ \sqrt{3}}{2} \)s

C.

2.25s

D.

1.00s

E.

2.00s

Correct answer is A

No explanation has been provided for this answer.