WorksheetsAMBER'Z
Total questions: 10
Worksheet time: 70secs
Ohm’s law states that:
Voltage is proportional to power
Voltage is proportional to resistance
Voltage is proportional to current
Current is inversely proportional to conductance
RMS value of a sinusoidal AC is:
0.5 × Peak value
0.637 × Peak value
0.707 × Peak value
Equal to Peak value
Power factor is defined as:
Active Power / Apparent Power
Reactive Power / Active Power
Apparent Power / Active Power
Active Power / Reactive Power
Transmission is done at high voltages because:
Reduces corona loss
Reduces current & I²R losses
Increases frequency
Increases load power factor
Synchronous motor is:
Self-starting
Always runs below synchronous speed
Not self-starting
Used only in DC circuits
The device used for generating AC is:
Rectifier
Alternator
Motor
Inverter
A diode allows current to flow:
Both directions
Only in reverse direction
Only in forward direction
Does not allow current
Inverter converts:
AC → DC
DC → AC
AC → AC
DC → DC
Ammeter is connected in:
Parallel, high resistance
Series, low resistance
Series, high resistance
Series, high resistance
A fuse works on principle of:
Induction
Overheating and melting
Magnetic effect
Ionization
