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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 specific resistance
Low specific resistance
High melting point
Negligibly small temperature co-efficient of resistance
High specific resistance
Low specific resistance
High melting point
Answer
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Related Question
Current Electricity
A current of 16 amperes divides between two branches in parallel of resistances 8 ohms and 12 ohms respectively. The current in each branch is
4.6 A, 9.6 A
6.4 A, 9.6 A
4.6 A, 6.9 A
6.4 A, 6.9 A
4.6 A, 9.6 A
6.4 A, 9.6 A
4.6 A, 6.9 A
6.4 A, 6.9 A
Answer
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Current Electricity
Sparking occurs when a load is switched off because the circuit has high
Inductance
Resistance
Capacitance
Impedance
Inductance
Resistance
Capacitance
Impedance
Answer
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Current Electricity
The resistance of a straight conductor is independent of
Temperature
Shape of cross-section
Material
Cross-sectional area
Temperature
Shape of cross-section
Material
Cross-sectional area
Answer
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Current Electricity
When resistance element of a heater fuses and then we reconnect it after removing a portion of it, the power of the heater will
Remain constant
Increase
None of these
Decrease
Remain constant
Increase
None of these
Decrease
Answer
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Current Electricity
Current velocity through a copper conductor is
nearly 3 x 108 m/s
the same as propagation velocity of electric energy
of the order of a few ^.s/m
independent of current strength
nearly 3 x 108 m/s
the same as propagation velocity of electric energy
of the order of a few ^.s/m
independent of current strength
Answer
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