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Current Electricity

Current Electricity
In a circuit a 33 Q resistor carries a current of 2 A. The voltage across the resistor is

33 V
66 V
80 V
132 V

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Current Electricity
The resistance of a straight conductor is independent of

Shape of cross-section
Temperature
Cross-sectional area
Material

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Current Electricity
Two lamps 100 W and 40 W are connected in series across 230 V. Which of the following statement is correct?

40 W lamp will glow brighter
Both lamps will glow equally bright
40 W lamp will fuse
100 W lamp will glow brighter

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Current Electricity
Which of the following quantities remain the same in all parts of a series circuit?

Current
Resistance
Power
Voltage

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

Constantan
Silver
Carbon
Copper

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Current Electricity
Current velocity through a copper conductor is

independent of current strength
the same as propagation velocity of electric energy
of the order of a few ^.s/m
nearly 3 x 108 m/s

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