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Current Electricity

Current Electricity
Temperature coefficient of resistance is expressed in terms of

ohms/°C
mhos/°C
ohms/ohm°C
mhos/ohm°C

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Current Electricity
Semiconductors have _______temperature co-efficient of resistance.

Positive
Zero
Negative
None of the listed here

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Current Electricity
Three resistance of 10 ohms, 15 ohms, and 30 ohm are connected in parallel. The total resistance of the combination is

5 ohms
15 ohms
10 ohms
55 ohms

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Current Electricity
Whether circuit may be AC. or D.C. one, following is most effective in reducing the magnitude of the current.

Inductor
Resistor
Capacitor
Reactor

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Current Electricity
Three 60 W bulbs are in parallel across the 60 V power line. If one bulb burns open

Rest of the two bulbs will not light
All three bulbs will light
There will be heavy current in the main line
The other two bulbs will light

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Current Electricity
All good conductors have high

Resistance
Thermal conductivity
Conductance
Reluctance

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