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Current Electricity
Resistance of a carbon filament lamp _______ as the applied voltage increases.
Decreases
Increases
Remains same
None of the listed here
Decreases
Increases
Remains same
None of the listed here
Answer
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Related Question
Current Electricity
An open resistor, when checked with an ohmmeter reads
Zero
Infinite
Low but not zero
High but within tolerance
Zero
Infinite
Low but not zero
High but within tolerance
Answer
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Current Electricity
Constantan wire is used for making starndard resistance because it has
Negligibly small temperature co-efficient of resistance
High melting point
High specific resistance
Low specific resistance
Negligibly small temperature co-efficient of resistance
High melting point
High specific resistance
Low specific resistance
Answer
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Current Electricity
The hot resistance of the bulb's filament is higher than its cold resistance because the temperature coefficient of the filament is
Negative
Positive
About 2 ohms per degree
Zero
Negative
Positive
About 2 ohms per degree
Zero
Answer
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Current Electricity
Which of the following is the best material for making connecting wires?
Nichrome
Constant
Copper
Manganin
Nichrome
Constant
Copper
Manganin
Answer
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Current Electricity
The weight of an aluminium conductor as compared to a copper conductor of identical cross-section, for the same electrical resistance, is
1
0.5
1.5
0.6
1
0.5
1.5
0.6
Answer
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