Waec Physics 2008 Past Questions and Answers

Question 36:

• WAEC 2008

A wire 1.0m long and with cross-sectional area 2.0 x 10^-7 m² has a resistance of 0.1\(\Omega\). Calculate the electrical conductivity of the wire

A. 2.0 x 10⁷\(\Omega^{-1} m^{-1}\)
B. 5.0 x 10⁷\(\Omega^{-1} m^{-1}\)
C. 2.0 x 10⁸\(\Omega^{-1} m^{-1}\)
D. 5.0 x 10⁸\(\Omega^{-1} m^{-1}\)

Question 37:

• WAEC 2008

Three capacitors each of capacitance 1.5\(\mu F\) are connected in series. The total capacitance in the circuit is

A. 2.0 \(\mu F\)
B. 1.5 \(\mu F\)
C. 0.6 \(\mu F\)
D. 0.5 \(\mu F\)

Question 38:

• WAEC 2008

A voltmeter is a device that

A. Draws high current
B. Has a very low resistance
C. Has a very high resistance
D. Is able to measure both voltage and current

Question 39:

• WAEC 2008

Which of the following actions will not increase the sensitivity of a moving coil galvanometer?

A. Using a strong temporary magnet
B. Increasing the area and number of turns of the coil
C. Using a week hair spring
D. Using a light pointer

Question 40:

• WAEC 2008

Fleming's right hand rule is also called the

A. Motor rule
B. Dynamo rule
C. Screw rule
D. Thumb rule