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Current Electricity

Current Electricity
In a lamp load when more than one lamp are switched on the total resistance of the load

Increases
None of these
Remains same
Decreases

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Current Electricity
A rheostat differs from potentiometer in the respect that it

Offers large number of tapping
Has higher wattage rating
Has lower wattage rating
Has large number of turns

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Current Electricity
The maximum current rating for a 10 kΩ, 0.5 W resistor is

0.707 mA
14.14 mA
7.07 mA
28.28 mA

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Current Electricity
Which of the following statement is true both for a series and a parallel D.C. circuit?

Elements have individual currents
Power are additive
Voltages are additive
Currents are additive

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Current Electricity
Varistors are

Insulators
Resistor with zero temperature co-efficient
Non-linear resistors
Carbon resistors

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Current Electricity
An instrument which detects electric current is known as

Wattmeter
Galvanometer
Rheostat
Voltmeter

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