Waec Physics 2013 Past Questions and Answers

Question 31:

• WAEC 2013

When a person holds a negatively charges metal rod and stands bare-footed on the ground, how will the charges leak?

A. Negative charges flows to the ground through the person's body
B. Positive charges flow from the ground through his body to neutralize the negative charges
C. Positive charges in the air neutralizes the negative charges the person is holding
D. Negative charges will leak through the air

Question 32:

• WAEC 2013

A charge of 2.0 x 10\(^{-5}\) C experiences a force of 80N in a uniform electric field. Calculate the magnitude of the electric field intensity

A. 8.0 x 10⁶ NC^-1
B. 4.0 x 10⁶ NC^-1
C. 4.0 x 10⁴ NC^-1
D. 2.0 x 10⁴ NC^-1

Question 33:

• WAEC 2013

A potential difference of 12V is applied across the ends of a 6\(\Omega\) resistor for 10 minutes. Determine the quantity of heat generated

A. 720J
B. 1200J
C. 14400J
D. 43200J

Question 34:

• WAEC 2013

Which of the following instruments is used to determine the accurate value of the electromotive force of a cell?

A. Voltmeter
B. Meterbridge
C. Voltameter
D. Potentiometer

Question 35:

• WAEC 2013

The capacitance of parallel plates capacitors varies

A. Inversely as the square of the distance between the plates
B. Directly as the square of the distance between the plates
C. Inversely as the distance between the plates
D. Directly as the distance between the plate