**1. Conventional flow assumes charges flow from:**

**A. Positive to negative**

B.

Positive to positive

C.

Negative to positive

D.

Negative to negative

**2. Electron flow assumes charges flow from:**

**A. Negative to positive**

B.

Negative to negative

C.

Positive to negative

D.

Positive to positive

3.

**Series resonance occurs
when:**

A.

XL = Xc

B.

XL=R

C.

Z=R

D.

**Both A and C**

**4. The symbol Q refers to:**

A.

Resonance quotient

B.

**Quality factor**

C.

Power quotient

D.

Qualification test

5.

**The ratio of W/VA in an**

AC circuit means:

AC circuit means:

**A. Power Factor**

B.

Reactive factor

C.

Quality factor

D.

Load factor

**6. What is the reciprocal of quality factor?**

A.

Power factor

B.

**Dissipation Factor**

C.

Reactive factor

D.

1 /Q factor

7.

**In liquids and gases,**

ionization current results from a flow of:

ionization current results from a flow of:

A.

Positive or negative ions

**B. Free Electrons**

C.

Ions that are lighter in weight than electrons:

D.

Protons

8.

**VL = Vc in a series RLC circuit when:**

A.

**The value of the impedance is minimum**

B.

The power factor is zero

C.

The current leads the total voltage by 90°

D.

The total voltage is zero

**9. At what frequency will an inductor of 5mH have the same**

reactance as a capacitor of 0.1 µF?

reactance as a capacitor of 0.1 µF?

A.

**7.12 KHz**

B.

7.12 Hz

C.

7.12MHz

D.

7.12 GHz

**10. Property of an electric circuit that dissipates electric**

energy:

energy:

A.

Reactance

B.

Impedance

**C. Resistance**

D.

Conductance

**11. What is the other name of relative permittivity?**

A.

Dielectric strength

B.

Potential gradient

C.

Breakdown voltage

**D.**

**Specific inductance capacity**

12

**. In a series RLC circuit**

**A.**

**The current lags VL by 90°**

B.

The current leads VL by 90°

C.

XL leads X. by 90°

D.

Z = jXL at resonance

13.

**Resistor with colored**

bands in the body

bands in the body

A.

Wire-wound resistor

**B. Carbon-composition resistor**

C.

Potentiometer

D.

Rheostat

**14. In a resonant circuit, if Q > 10 resonant frequency______**

bandwidth.

bandwidth.

**A. Bisects**

B.

Exceeds

C.

Is less than

D.

Is equal to

**15. Which of the following conditions is not true for a series**

RLC circuit at resonance?

RLC circuit at resonance?

**A. Z=j**XL

B.

XL = Xc

C.

The power factor is one.

**16. The current is ————- times the maximum current at**

half-power points of a resonance curve.

half-power points of a resonance curve.

**A. 0.707**

B.

1.414

C.

0.5

D.

0.632

**17. A gang capacitor is a variable capacitor in which**

capacitance is varied by changing the:

capacitance is varied by changing the:

A.

Dielectric

B.

Number of plates

C.

Distance between plates

**D. Plate Area**

**18. In an ac circuit with inductive reactance, the**

A.

Phase angle of the circuit is always 45°

B.

Voltage across the inductance must be 90° out-of-phase with the applied voltage

**C. Current through the inductance lags its induced voltage by 90°**

D.

Current through the inductance and voltage across it are l80° out-of-phase

**19. If three 9 mH inductors are connected in parallel without**

mutual inductance then the total inductance is

mutual inductance then the total inductance is

**A. 3 mH**

B.

9 mH

C.

27 mH

D.

18 mH

**20. What is the specific resistance of a pure germanium?**

**A. 55 Ohm-cm**

B.

55 Ohm-m

C.

55 Ohm-mm

D.

55 KOhm-m

**21. Two capacitors of capacitance 9 µF and 18 µF in series will
have a total capacitance of:**

A.

27 µF

**B. 6 pF**

C.

162 µF

D.

180 µF

**22. In a series RLC circuit:**

A.

Increasing the frequency decreases the resistance

**B. Both XL and Xc change as frequency changes**

C.

Increasing the frequency increases the resistance

D.

Impedance will always decrease

**23. A series RLC circuit has a ________ power factor at its**

half-power points

half-power points

A.

Unity

B.

Leading

C.

Lagging

**D. Either B or C**

24.

**Kirchhoff’s laws (KCL and KVL) are applicable to:**

A.

DC circuits

B.

AC circuits

C.

Passive networks alone

**D. DC as well AC circuits**

25.

**A tank circuit is a:**

**A. Parallel LC Circuit**

B.

Series LC circuit

C.

A resonant circuit

D.

A non-resonant circuit

**26. A capacitive load always has a______ power factor.**

**A. Leading**

B.

Lagging

C.

Zero

D.

Unity

**27. What is the temperature coefficient of the resistance**

Eureka?

Eureka?

A.

Infinity

B.

Negative

**C. Almost Zero**

D.

Positive

**28. As applied to a series RLC circuit, bandwidth means**

A.

The frequency range for maximum power transfer

B.

The difference between the highest and lowest frequencies of the oscillator

C.

The frequency at which XL = Xc

**D. The separation of the half-power points**

29.

**Which is considered as the effect of a dielectric material?**

A.

**Increasing capacitance**

B.

Decreasing capacitance

C.

Reducing the working voltage

D.

Increasing the distance between the plates

**30. The open-circuit voltage at the terminal of load RL is 60V.**

Under the condition of maximum power transfer, the load voltage will be:

Under the condition of maximum power transfer, the load voltage will be:

A.

60 V

B.

15 V

**C. 30V**

D.

20 V

**31. If a capacitor is rated for 200V dc, what is its effective**

ac working voltage?

ac working voltage?

A.

50 V

B.

100 V

**C. 200 V**

D.

400 V

**32. If resonant frequency is 10 kHz and quality factor is 50,**

then

then

**A. Bandwidth is 200 Hz**

B.

XL = is 50,000 Ohm

C.

R is 50 Ohm

D.

XC = is 50,000 Ohm

33.

**Which statement is true?**

A.

A series resonant circuit is of high impedance

B.

A parallel resonant circuit is of low impedance

**C. A series resonant circuit is inductive if it operates at a**

frequency higher than resonant frequency

frequency higher than resonant frequency

D.

A parallel resonant circuit is inductive if it operates at a frequency higher

than the resonant frequency

**34. What is considered as the most important value of a sine**

wave?

wave?

**A. Effective value**

B.

Peak value

C.

Average value

D.

Instantaneous value

**35.**

**An**

AC series circuit is composed of a resistance of 20 ohm, inductive reactance of

40 ohm, and a capacitive reactance of 15 ohm. If a current of 1 ampere is

flowing, what is the applied voltage?

AC series circuit is composed of a resistance of 20 ohm, inductive reactance of

40 ohm, and a capacitive reactance of 15 ohm. If a current of 1 ampere is

flowing, what is the applied voltage?

A.

320 V

**B. 32 V**

C.

220 V

D.

22 V

36

**.**

An intermittent and non-symmetrical alternating current like that obtained from

the secondary winding of an induction coil

An intermittent and non-symmetrical alternating current like that obtained from

the secondary winding of an induction coil

**A. Faradic current**

B.

Transient ac current

C.

Inductive current

D.

Capacitive current

37.

**The value of temperature coefficient (alfa) is dependent upon**

A.

**The nature of material and temperature**

B.

The length of material

C.

The cross-sectional area of the material

D.

The volume of the material

38.

**At what frequency will the current in a series RLC circuit reach its maximum**

value for an applied voltage of 15 V with R = 500 ohm , L = 100 µH and C =

0.001 µF?

value for an applied voltage of 15 V with R = 500 ohm , L = 100 µH and C =

0.001 µF?

A.

403 kHz

**B. 503 KHz**

C.

603 kHz

D.

303 kHz

39.

**If two equal resistances connected in series across a certain supply are now**

connected in parallel across the same supply, the power produced will be

__________ that of series connection:

connected in parallel across the same supply, the power produced will be

__________ that of series connection:

A.

One-half

**B. Four times**

C.

One-fourth

D.

Two times

**40. The voltage lags the current by Pi/2 cycle in a:**

A.

Purely resistive circuit

B.

Purely inductive circuit

**C. Purely capacitive circuit**

D.

Circuit containing resistance, capacitance and inductance

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