Draw the symbol of the rheostat, voltmeter, and electric bulb.

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Solution

Rheostat
Voltmeter
Electric bulb

Rheostat
It is a variable resistor that can alter its resistance to change the amount of current flowing through a circuit.
Voltmeter
It is a device that measures the difference in the electric potential between two locations in an electric circuit.
Electric bulb
It is a device giving electric light that has a wire filament that has been heated till it glows.

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