1. Permanent magnet is normally made of-

Aluminum

Wrought iron

Cast iron

Alnico alloys

2. A transformer has negative voltage regulation when its load power factor is-

Zero

Unity

Leading

Lagging

3. Dose the transformer draw any current when its secondary is open ?

No

Yes

Take rated current

None

4. How can eddy current loss be minimized ?

By using copper core

By using solid core

By laminating the core

None of above

5. If the power factor of a circuit is unity, its reactive power is-

A maximum

Equal to FR

Zero

A negative quantity

6. Which is the used power factor improvement-

Spring motor

Commutator motor

Synchronous motor

Squirrel Case Motor

7. Active power is equal to-

F Z

VI Sin

VI Cos

None

8. One Cubic water is equal to-

74.6 U.S Gallon

628 pound water

28.375 Line

28.3 Cubic meter

9. Which power factor is more economical for the consumers-

0.85 Lagging

0.95 Lagging

0.10 Leading

0.85 Leading

10. What would be the charge of a uF when connected with 20V supply?

2000 uC

200 uC

300 uC

30 uC