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Current Electricity
A closed switch has a resistance of
Zero
About 50 ohms
About 500 ohms
Infinity
Zero
About 50 ohms
About 500 ohms
Infinity
Answer
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Related Question
Current Electricity
Which of the following is the best conductor of electricity?
Gold
Copper
Zinc
Silver
Gold
Copper
Zinc
Silver
Answer
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Current Electricity
The hot wire of electric bulb's filament is higher than its cold resistance because the temperature co-efficient of filament is
Negative
Positive
None of the listed here
Zero
Negative
Positive
None of the listed here
Zero
Answer
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Current Electricity
A 40 W bulb is connected in series with a room heater. If now 40 W bulb is replaced by 100 W bulb, the heater output will
Increases
Heater will burn out
Decreases
Remains same
Increases
Heater will burn out
Decreases
Remains same
Answer
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Current Electricity
Electrical current is due to the flow of
Both positive and negative charges
Neutral particles only
Positive charges only
Negative charges only
Both positive and negative charges
Neutral particles only
Positive charges only
Negative charges only
Answer
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Current Electricity
A wire having very high value of conductance is said to be
Moderately good conductor
Insulator
Very good conductor
None of the listed here
Moderately good conductor
Insulator
Very good conductor
None of the listed here
Answer
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