1. All sine waves
Correct answer: (A)
Have similar general appearance
2. The location of lighting arrestor is?
Correct answer: (D)
None
3. The principle of operation of a 3 phase induction motor is most similar to that of a
Correct answer: (C)
transformer with a shorted secondary
4. Which of the following is not a general characteristic of ac wave?
Correct answer: (C)
The electrons always flow in the same direction
5. A battery has a short-circuit current of 30A and an open circuit voltage of 24V. If the battery is connected to an electric bulb of resistance 2 ?, the power dissipated by the bulb is
Correct answer: (C)
112.5W
6. A battery is source of
Correct answer: (A)
DC voltage
7. A BJT has
Correct answer: (B)
three semiconductor layers
8. A capacitor is charged by a constant current of 2mA and results in a voltage increase of 12V in a 10 sec interval. The value of capacitance is
Correct answer: (D)
1.67mF
9. A common-collector transistor circuit is often used
Correct answer: (B)
to match a high impedance to a low impedance
10. A complex wave form made up frequency components 1 Hz, 3 Hz, 5 Hz, 7 Hz and 9 Hz. Its fundamental frequency is
Correct answer: (C)
1 Hz