An electric filament bulb can be worked from____________?
An electric filament bulb can be worked from____________?
A. D. C. supply only
B. A. C. supply only
C. Battery supply only
D. All above
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Internal resistance of ideal voltage source is ?
Internal resistance of ideal voltage source is ?
A. zero
B. infinite
C. finite
D. 100 ohmsInternal resistance of ideal voltage source is
The hot resistance of the bulb’s filament is higher than its cold resistance because the temperature co-efficient of the filament is___________________?
The hot resistance of the bulb’s filament is higher than its cold resistance because the temperature co-efficient of the filament is___________________?
A. zero
B. negative
C. positive
D. about 2 ohms per degreeFor testing appliances, the wattage of test lamp should be_____________?
For testing appliances, the wattage of test lamp should be_____________?
A. very low
B. low
C. high
D. any value74. Sparking occurs when a load is switched off because the circuit has high_________?
74. Sparking occurs when a load is switched off because the circuit has high_________?
A. resistance
B. inductance
C. capacitance
D. impedanceThe insulation on a current carrying conductor is provided__________?
The insulation on a current carrying conductor is provided__________?
A. to prevent leakage of current
B. to prevent shock
C. both of above factors
D. none of above factorsWhich of the following quantities consists of SI unit as WATT ?
Which of the following quantities consists of SI unit as WATT ?
A. Force
B. Charge
C. Current
D. PowerThe SI unit of power is the watt and it is discover by the Scottish Engineer James Watt. Power is the rate of consumption of electric energy. So, it is equivalent to joules per second.