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Electric Circuits and Currents
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General Science for Class 7
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Electric Circuits and Currents
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Electric Circuits and Currents
Normally electric appliances have power rating
marked on them
above 100kW
below 1W
written in their booklets
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Electric Circuits and Currents
When a large current passes through a fuse, it
melts the wire in the fuse
glows up the wire in the fuse
sparks the wire and breaks the circuit
it simply spark the wire
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Electric Circuits and Currents
The filament bulb glows, when it reaches the temperature of
1000 °C
1100 °C
1200 °C
1300 °C
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Electric Circuits and Currents
The process used in electroplating is called
electrodeposition
cathoding
anoding
electrorides
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Electric Circuits and Currents
When switch is closed, the magnet pulls out the
splinter from eye
eyeball
lens of the eye
retina
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Electric Circuits and Currents
In our homes, electric supply uses
series circuit
parallel circuit
both circuits
electrionic circuit
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Electric Circuits and Currents
Electric motor changes electrical energy into
potential energy
thermal energy
heat energy
kinetic energy
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Electric Circuits and Currents
If temperature rises very high, it can be used in
electric lamps
electric heaters
electric coolers
electric fans
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Electric Circuits and Currents
If you are the only conductor around, the electricity will flow through
you
me
us
insulator
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Electric Circuits and Currents
The charge flowing in the wire when we turn the light on, is
positive ions
negative ions
electrons
protons
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