STATIC ELECTRICITY
1. An operating
lamp draws a current of 0 .4 amperes. The amount of charge passing through the
lamp in 10 seconds is?
2.
A current of 12 A flows for 20 minutes into an
electric cooker.
How much charge has the cooker used?
How much charge has the cooker used?
3.
The current travelling
through the filament of a lamp is 2 A. How many electrons pass through the
filament?
4.
(a) The current in an
electric circuit is 0.25A. How long does it take for the quantity of charge
5000 C to pass any given point in the circuit?
(b) An electric kettle has
resistance of 32Ω. If the potential difference across is 240V, find the current
flowing through the kettle.
5.
The current flowing through
a resistor is 0.15A. Given that the elementary charge of an electron is 1.6 x
10-19C, determine the number of electrons that pass through the
resistor in 20 minutes.
6.
Three capacitors of
capacitances 30µF, 20µF and 40µF are connected in a circuit. Calculate the
equivalent capacitor when connected
i)
In series
ii) In parallel
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