WorksheetsCIRCUIT THEORY
Total questions: 10
Worksheet time: 50secs
A pure capacitor connected across an A.C. voltage consumed 50 W. This is due to
The capacitive reactance in ohms
The current flowing in capacitor
The size of the capacitor being quite
The statement is incorrect
The period of a wave is
The same as frequency
Time required to complete one cycle
Expressed in amperes
None of the above
The r.m.s. value and mean value is the same in the case of
Triangular wave
Sine wave
Half wave rectified sine wave
Square wave
Poor power factor
Reduces load handling capability of electrical system
Results in more power losses in the electrical system
Overloads alternators, transformers and distribution lines
Results in all above
The safest value of current the human body can carry for more than 3 second is
25 mA
9 mA
4 mA
15 mA
In a pure resistive circuit
Current lags behind the voltage by 90°
Current leads the voltage by 90°
Current can lead or lag the voltage by 90°
Current is in phase with the voltage
When an alternating current passes through an ohmic resistance the electrical power converted into heat is
Apparent power
True power
Reactive power
None of the above
The power factor of a D.C. circuit is always
Greater than unity
Zero
Less than unity
Unity
Power factor of electric bulb is
Unity
Zero
Lagging
Leading
A heater is rated as 230 V, 10 kW, A.C. The value 230 V refers to
Average voltage
None of the above
Peak voltage
r.m.s. voltage
