Physics Past Questions and Answers

The sound heard by a person after the reflection of the sound generated by him is called

A Reverberation
B Resonance
C Echo
D Audibility

Question 1492:

Which of the following sets of coloured light is/are secondary colours i. Red, Blue and green ii. Blue, cyan and magneta iii. Green, Magenta and yellow, IV Yellow, Cyan and Magenta

A I and ii only
B Ii and iii only
C Iv only
D I, ii and iv only

Question 1493:

When two like charges are brought together, the potential energy of the system formed will

A Increase because work is done against the field
B Increase because work is done by the field
C Decrease because work is done by the field
D Decrease because work is done against the field

Question 1494:

Two capacitors, each of capacitance 2\(\mu\)F are connected in parallel. If the p.d across them is 120V, calculate the charge on each capacitor

A 6.0 x 10^-5C
B 1.2 x 10^-4C
C 2.4 x 10^-4C
D 4.8 x 10^-4C

Question 1495:

Which of the following properties is an advantage of lead-acid accumulator over an alkaline accumulator?

A Possesses low internal resistance
B Can be recharges
C Has shorter life span
D Possesses high e.m.f