WorksheetsElectricity
Total questions: 11
Worksheet time: 4mins
When the length of a wire is doubled, its resistivity as well as resistance is doubled.
True
False
The resistance of a thin wire is more than that of a thick wire of the same length and same material.
True
False
(a) is used for preparing the filament of an electric bulb.
Which of the following is based on heating effect of electric current
Electric fan
Electric geyser
Electric generator
All of the above
Electric motor
1 kw h = ______ J
36 x 10^6
3.6 x 10^-8
36 x 10^8
3.6 x 10^6
Commercial unit of electric energy is
joule
watt
joule- hour
kilowatt hour
Which of the following makes use of series grouping of resistors ?
Various electrical points in a room
Fairy lights to decorate
Different electrical gadgets in a house
None of these
Three resistors of 7.5 ohm, 10 ohm and 12.5 ohm are connected is series. The equivalent resistance of the circuit
30 ohm
15 ohm
3.1 ohm
20 ohm
The rheostat is used in the circuit to
increase the magnitude of the current
decrease the magnitude of the current
increase or decrease the magnitude of current
None of the above
The symbol of ammeter
Try and draw the symbol for bulb
