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Current Electricity
The specific resistance of a metallic conductor ______ with rise in temperature.
None of the listed here
Remains unchanged
Decreases
Increases
None of the listed here
Remains unchanged
Decreases
Increases
Answer
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Related Question
Current Electricity
Constantan wire is used for making starndard resistance because it has
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
Negligibly small temperature co-efficient of resistance
Answer
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Current Electricity
All good conductors have high
Reluctance
Conductance
Thermal conductivity
Resistance
Reluctance
Conductance
Thermal conductivity
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
About 2 ohms per degree
Positive
Negative
Zero
About 2 ohms per degree
Positive
Negative
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
Remains same
Heater will burn out
Decreases
Increases
Remains same
Heater will burn out
Decreases
Answer
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Current Electricity
An electrical lamp coonsumes 100 W of power. If the supply voltage is 220 V the energy consumed in 30 minutes is
0.005 kWh
5 kWh
0.05 kWh
5 kWh
0.005 kWh
5 kWh
0.05 kWh
5 kWh
Answer
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