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प्रश्न
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उत्तर
Four components of an electrical circuit
(i) Cell 
(ii) A load (bulb) 
(iii) Key 
(iv) Connecting wire 
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संबंधित प्रश्न
How many joules of electrical energy are transferred per second by a 6 V; 0.5 A lamp?
(a) 30 J/s
(b) 12 J/s
(c) 0.83 J/s
(d) 3 J/s
Name two gases which are filled in filament type electric light bulbs.
A bulb marked 12 V, 24 W operated on a 12 volt battery for 20 minutes. Calculate:
(i) the current flowing through it, and
(ii) the energy consumed
Two resistors A and B of resistance 4 Ω and 6 Ω respectively are connected in parallel. The combination is connected across a 6 volt battery of negligible resistance. Calculate: (i) the power supplied by the battery, (ii) the power dissipated in each resistor.
The diagram 31 shows a 3 terminal plug socket.
(i) What is the purpose of the terminal E?
(ii) To which part of the appliance is the terminal E connected?
(iii) To which wire L or N, is the fuse connected and why?
An electric bulb of resistance 500 Ω draws current 0.4 A from the source. Calculate:
- the power of bulb and
- the potential difference at its end.
What is electric power? State and define its S.I. unit.
Why is a concave reflector placed behind the heating element in a room heater.
How does the heat produced by die passage of current in a metallic wire depend on the resistance of the wire.
Unit of electric power may also be expressed as:
