Physics questions and answers

Physics Questions and Answers

If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.

1,361.

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.

1,362.

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.

1,363.

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.

1,364.

The half-life of a radio-active element is 9 days, what fraction of atoms has decayed in 36 days?

A.

\( \frac{1}{16} \)

B.

\( \frac{1}{4} \)

C.

\( \frac{1}{2} \)

D.

\( \frac{15}{16} \)

Correct answer is D

No explanation has been provided for this answer.