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Physics Past Questions and Answers

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Physics Questions

Question 3181:

Which of following functions is performed by manganese IV oxide in the Lenclanche cell?

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A Control of local action
B Depolarisation of the cell
C Regulating current flow in the cell
D Reduction of the internal resistance of the cell

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Question 3182:

A car fuse marked 3A operates optimally on a 12V battery, calculate the resistance of the fuse

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A 36.0\(\Omega\)
B 15.0\(\Omega\)
C 9.0\(\Omega\)
D 4.0\(\Omega\)

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Question 3183:

Find the cost of running a 60W lamp for 24 hours. If 1kW hr cost 5 naira

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A 14.4 naira
B 12.5 naira
C 7.2 naira
D 2.0 naira

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Question 3184:

The quantity of electric charge stored in a capacitor is measured in

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A Farad
B Ampere
C Coulomb
D Volt

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Question 3185:

Calculate the energy stored in a 20\(\mu F\) capacitor. If the p.d between the plates is 40V

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A 3.2 x 10^-2J
B 1.6 x 10^-2J
C 8.0 x 10^-4J
D 4.0 x 10^-4J

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