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Current Electricity

Current Electricity
A field of force can exist only between

Two molecules
Two ions
Two atoms
Two metal particles

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Current Electricity
Sparking occurs when a load is switched off because the circuit has high

Resistance
Capacitance
Impedance
Inductance

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Current Electricity
The resistance of conductor varies inversely as

Temperature
Area of cross-section
Length
Resistivity

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Current Electricity
The resistance of human body is about

1000 ohm
200 ohm
25 ohm
10 ohm

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Current Electricity
In which of the following substances the resistance decreases with increase in temperature?

Carbon
Copper
Constantan
Silver

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Current Electricity
Resistance of 220 V, 100 W lamp will be

48.4 Q
4840 Q
4.84 Q
484 ft

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