# Basic electrical Multiple choice questions and answers

01. The inverse of capacitance is called

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reluctance.

conductance.

susceptance.

elastance.

02. In a capacitor the electric charge is stored in

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metal plates.

dielectric.

both of (A) and (B).

none of above.

03. A external resistance R is connected to a cell of internal resistance r, then the current is maximum when

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R < r.

R > r.

R = r.

none of the above.

04. Cell short circuit results in

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low specific gravivity.

abnormal high temperature.

reduced gassing on charge.

all of above.

05. Electrics supply for electroplating should be

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low AC voltage.

low frequency ac voltage.

DC voltage.

any of above.

06. Which law(s) find application in electrolysis?

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Ohms law.

Gausss law.

Coulombs law.

07. The phase angle difference between current and voltage is 90, the power will be

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minimum.

maximum.

zero.

VI.

08. Which of the following is not a bilateral element?

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Resistor.

Diode.

Capacitor.

Inductor.

09. A branch of a network is said to be passive when it contains

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voltmeter.

voltage source.

current source.

battery.

10. A branch of a network is said to be active when it consists of one

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resistor.

voltage source.

inductor.

capacitor.

11. The energy required to charge a 10 Î¼F capacitor to 100 V is

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0.01 J.

0.05 J.

5 × 10-9 J.

10 × 10-9 J.

12. The linear circuit element is

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capacitor.

inductor.

resistor.

all of above.

13. Flux in a magnetic circuit can be compared in an electric circuit to

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voltage.

current.

resistance.

inductance.

14. If the peak value of a sine wave is 100 V, then its RMS value will be

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88 V.

70.7 V.

63.6 V.

100 V.

15. Two resistors R1 and R2 give combined resistance of 4.5 Ohm when connected in series and 1 Ohm when in parallel, the resistances are

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2.2 Ohm and 2.3 Ohm.

1.5 Ohm and 3 Ohm.

2 Ohm and 2.5 Ohm.

1.25 Ohm and 3.25 Ohm.

16. Condition for reciprocity in case of ABCD parameters is

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AB-CD = 1.

AB-CD = 0.

17. Which of the following statement is incorrect?

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Voltage source is a passive element.

Current source is an active element.

Resistance is a passive element.

Inductance is a passive element.

18. A current is said to be alternating when it changes in

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magnitude.

direction.

both ‘a’ and ‘b’.

none of these.

19. In which of the circuits power factor can be zero?

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capacitive.

inductive.

both ‘a’ and ‘b’

resistive.

20. A 3 – Ï† delta connected symmetrical load consumes P Watts of power from a balanced supply. If the same load is connected in star to the same supply then what is the power consumption?

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P/3.

P.

√3P.

3P.