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DGVCL Exam Paper (12-06-2016)

DGVCL Exam Paper (12-06-2016)
A 100-watt light bulb turned on for 8 hours uses :

8 kWh
800 Wh
0.8 kWh
None of these

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In Solution 0.8 kWh and 800 Wh both options are given as answer as both are correct

DGVCL Exam Paper (12-06-2016)
Capacitance is the ability of a body to store an _____

All of these
voltage
electrical charge
electric current

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DGVCL Exam Paper (12-06-2016)
For a 66 kV line having span of 200 meters between towers the approximate sag will be 2 m. If the span is double the sag will be:

8 m
1 m
4 m
2 m

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DGVCL Exam Paper (12-06-2016)
The main advantage of AC over DC is:

AC is easy to maintain & can be easily distributed at long distances
Conversion flexibility from one voltage level to other
AC can be easily converted into DC by using a rectifier
All of these

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DGVCL Exam Paper (12-06-2016)
The following is correct :

P = VxI
P = I²xR
All of these
P = V²/R

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True for DC Circuits.

For single pahse ac P = V I CosØ

DGVCL Exam Paper (12-06-2016)
A circuit breaker is designed to protect an electrical circuit from damage caused by :

Over load
Short circuit
Over current
All of these

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