JAMB Physics Past Questions & Answers - Page 146

727.

The function of a 5-A fuse included in a circuit supplying a household refrigerator with power is to keep the

A.

Temperature of the refrigerator low and constant

B.

keep current supplied to the refrigerator below 5A

C.

Voltage supply constant

D.

Current supplies to the refrigeration

Correct answer is B

No explanation has been provided for this answer.

728.

An object is placed at 5.6 x 10-4m in front of a converging lens of focal length 1.0 x 10-nm. The image formed is

A.

Real, Erect and magnified

B.

Virtual, erect and magnified

C.

Real, inverted and magnified

D.

Virtual, erect and diminished

Correct answer is C

No explanation has been provided for this answer.

729.

A spring of length 25cm is extended to 30cm by a load of 150N attached to one of its end, what is the energy stored in the spring?

A.

3750J

B.

2500J

C.

3.75J

D.

2.50J

Correct answer is C

No explanation has been provided for this answer.

730.

An alternating source is connected in series to a capacitor of capacity reactance \( 10^3 \sqrt{3} \) and a resistor of resistance 103 Ohms. The Impedance of the circuit is...

A.

\( 2000 \sqrt{3} \) Ohms

B.

2000 Ohms

C.

\( 1000 \sqrt{3} \) Ohms

D.

1000 Ohms

Correct answer is B

No explanation has been provided for this answer.