Free Printable Unit 2 -Part 2

1.

Which is a positive charge?

a)

A. Electron

b)

B. Neutron

c)

C. Proton

d)

D. Valance electron

2.

Which of the following is true for two opposite charges?

a)

A. They always repel each other

b)

B. Sometimes they attract and other time they repel

c)

C. They always stay far away from each other

d)

D. They always attract each other

3.

which from the following is electromotive force that push the electrons in a circuit?

a)

A. Current

b)

B. Resistance

c)

C. Voltage

d)

D. Power

4.

4.What is the unit of electric current?

a)

A. Volt

b)

B. Watt

c)

C. Ampere

d)

D. Ohm

5.

Which of the following does not conduct electricity?

a)

A. Brass

b)

B. Copper

c)

C. Aluminum

d)

D. Rubber

6.

Which of the following material has the best conductivity?

a)

A. Gold

b)

B. Dry wood

c)

C. Plastic

d)

D. Glass

7.

What is used as electrolyte in lead acid batteries?

a)

A. Distilled water

b)

B. Pure acid

c)

C. Diluted acid

d)

D. concentrated acid

8.

Which of the following component detect light?

a)

A. Thermocouple

b)

B. Photocell

c)

C. Battery

d)

D. Dry cell

9.

10.What is the current in a circuit if the applied voltage is 700V and the total circuit resistance is 100 ohms?

a)

70A

b)

7A

c)

7.5A

d)

9A

10.

calculate the total current of the circuit?

a)

55mA

b)

55A

c)

100mA

d)

70mA

11.

13.What is the current through each resistor?

a)

10A

b)

5A

c)

12A

d)

20A

12.

15.Calculate the total resistance of the circuit shown?

a)

46.67 Ohm

b)

70 ohm

c)

6.67ohm

d)

100 ohm

13.

17.Estimate the resistance value for the resistor shown.

a)

22

b)

220

c)

22k

d)

120

14.

.How do we connect a voltmeter?

a)

A. Series

b)

B. Both series and parallel

c)

C. Parallel

d)

D. Should be connected while circuit is power off

15.

how do we connect the ammeter in a circuit?

a)

A. Series

b)

B. Parallel

c)

C. Both series and parallel

d)

D. Should be connected while circuit is power off

16.

what is the condition of using an ohm meter?

a)

A. Use when circuit is energized with dc supply

b)

B. Use when circuit is energized with ac supply

c)

C. Only use on energized series dc circuits

d)

D. Only use when the circuit power is off

17.

What is use of megger in electrical field?

a)

A. To measure low value of resistance

b)

B. To measure high value of resistance

c)

C. To measure the resistance of earth conductor

d)

D. To measure the resistance of lighting fixtures

18.

29.Calculate the time of 100 Hz signal.

a)

0.0001 s

b)

10ms

c)

100ms

d)

1000ms

19.

30.What would be the output frequency of 10 poles generator turning at 750 rpm?

a)

62.5 Hz

b)

50 Hz

c)

100 Hz

d)

90 Hz

20.

31.The value of the RMS voltage of ac signal is 38 V. What is the approximate peak value?

a)

53.7 V

b)

26.86 V

c)

80 V

d)

90 V

21.

32.How do we name the number of cycles per second of ac signal ?

a)

A. Frequency

b)

B. Time period

c)

C. RMS value

d)

D. Average value

22.

33.Find the impedance of an ac circuit if R=2 ohm and XL=15 ohm.

a)

15 Ohm

b)

19 Ohm

c)

56 Ohm

d)

23 Ohm

23.

34.Calculate inductive reactance of a circuit if the frequency is 50 Hz and inductance in 0.7 henry.

a)

220 ohm

b)

145 ohm

c)

264 ohm

d)

566 ohm

24.

Ratio of true power to apparent power is known as__________.

a)

A. Power factor

b)

B. Real power

c)

C. Imaginary power

d)

D. Active power

25.

Identify the information indicated by "A" in the figure.

a)

A. Wire size marking

b)

B. No of strands

c)

C. No of conductors in the cable

d)

D. Current rating of cable

26.

38.Which of the following cable insulation is “Heat Resistant Thermoplastic”?

a)

A. TW

b)

B. SIS

c)

C. TFE

d)

D. THHN

Unit 2 -Part 2

Total questions: 26

Worksheet time: 13mins

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