Waec Physics 2012 Past Questions and Answers

Question 31:

• WAEC 2012

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 32:

• WAEC 2012

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 33:

• WAEC 2012

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 34:

• WAEC 2012

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 35:

• WAEC 2012

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