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Current Electricity

Current Electricity
The rating of a fuse wire is always expressed in

kWh
Ampere-volts
Ampere-hours
Amperes

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Current Electricity
Voltage dependent resistors are used

To suppress surges
For inductive circuits
As current stabilizers
As heating elements

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Current Electricity
Which of the following material has nearly zero temperature co-efficient of resistance?

Porcelain
Copper
Manganin
Carbon

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Current Electricity
Electric current is a

Number only
Sometimes scalar and sometimes vector
Vector quantity
Scalar quantity

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Current Electricity
With rise in temperature the resistance of pure metals

Remains constant
First increases and then decreases
Increases
Decreases

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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

5 kWh
5 kWh
0.005 kWh
0.05 kWh

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