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प्रश्न
Kilowatt hour is the unit of
पर्याय
resistivity
conductivity
electrical energy
electrical power
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उत्तर
Electrical energy
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संबंधित प्रश्न
An electric bulb of resistance 20 Ω and a resistance wire of 4 Ω are connected in series with a 6 V battery.
Draw the circuit diagram, and calculate:
(a) total resistance of the circuit.
(b) current through the circuit.
(c) potential difference across the electric bulb.
(d) potential difference across the resistance wire.
What happens to the other bulbs in a parallel circuit if one bulb blows off?
Ten bulbs are connected in a series circuit to a power supply line. Ten identical bulbs are connected in a parallel circuit to an identical power supply line.
(d) Which circuit would have less current in it?
Two lamps, one rated 40 W at 220 V and the other 60 W at 220 V, are connected in parallel to the electric supply at 220 V.
(a) Draw a circuit diagram to show the connections.
(b) Calculate the current drawn from the electric supply.
(c) Calculate the total energy consumed by the two lamps together when they operate for one hour.
How does the heat H produced by a current passing through a fixed resistance wire depend on magnitude of current I?
Name two effects produced by electric current.
An electric iron is rated 750 W, 230 V. Calculate the electrical energy consumed by the press in 16 hours.
A geyser is rated 1500 W, 250 V. This geyser is connected to 250 V mains. Calculate:
- The current drawn,
- The energy consumed in 50 hours, and
- The cost of energy consumed at ₹ 4.20 per kWh.
State expression for Cells connected in series.
