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What is the meaning of the symbol kWh? Which quantity does it represent?
An electric lamp is labelled 12 V, 36 W. This indicates that it should be used with a 12 V supply. What other information does the label provide?
What is meant by "electric power"?
The SI unit of energy is :
(a) joule
(b) coulomb
(c) watt
(d) ohm-metre
What is the current I in the given circuit (Fig. )?
Write the SI units for:
(a) Electric current
(b) Potential difference
(c) Charge.
With reference to the diagram shown below calculate:
(i) The equivalent resistance between P and Q.
(ii) The reading of ammeter.
(iii) The electrical power between P and Q.
Two bulbs are rated: bulb A 100W, 120 V bulb B 10W, 120 V. If both are connected across a 120V supply, which bulb will consume more energy, When in series? Also calculate the current through each bulb in above cases.
Unit of electric power may also be expressed as:
1 mV is equal to:
