Electrician Theory Test 1 I Year

Electrician I Year Test 1

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1 / 20

1) Calculate the total capacitance value in the circuit.

A) 6 µF

B) 0.16 µF

C) 30 µF

D) 70 µF

2 / 20

2) What is the unit of capacitance?

A) Farad

B) Henry

C) Coulomb

D) Mho

3 / 20

3) Which is the application of series circuit?

A) Shunt resistor in ammeter

B) Voltmeter connection

C) Lighting circuits in home

D) Multiplier resistor of a voltmeter

4 / 20

4) Which resistor the lowest current flows in a parallel circuit having the values of 50 Ω 220 Ω, 450 Ω and 560 Ω connected with supply?

A) 560 Ω

B) 220 Ω

C) 50 Ω

D) 450 Ω

5 / 20

5) Calculate the hot resistance of 200W / 250V rated lamp.

A) 312.5

B) 31.25

C) 62.5

D) 625

6 / 20

6) What is the total inductance if 3 inductors (L1, L2 and L3) are connected in series?

A) LT = 1 𝐿1 + 1 𝐿2 + 1 𝐿3

B) LT = L1 + L2 + L3

C) LT = 1 𝐿1+𝐿2+𝐿3

D) LT = L1 x L2 x L3

7 / 20

7) What is the voltage drop in resistor ‘R2’ in the series circuit?

A) 20 volt

B) 25 volt

C) 10 volt

D) 15 volt

8 / 20

8) What is the unit of Magneto Motive Force (MMF)?

A) Ampere / turns

B) Ampere / m2

C) Ampere - m

D) Ampere - turns

9 / 20

9) Which is inversely proportional to the resistance of a conductor?

A) Temperature

B) Area of cross section

C) Resistivity

D) Length

10 / 20

10) How the value of capacitance can be decreased?

A) Increasing the plate area

B) Increasing the resistance of the plates

C) Using high dielectric constant material

D) Increasing the distance between the plates

11 / 20

11) Which is the diamagnetic substance?

A) Water

B) Platinum

C) Steel

D) Air

12 / 20

12) Which factor affects the polarity of the electromagnet?

A) Length of the coil

B) Direction of current

C) Strength of current

D) Strength of the magnetic field

13 / 20

13) Which material is having negative temperature co-efficient property?

A) Manganin

B) Mica

C) Eureka

D) Copper

14 / 20

14) What is the value of resistance in an open circuit?

A) Infinity

B) High

C) Low

D) Zero

15 / 20

15) What is the name of the resistor?

A) Metal film resistor

B) Wire wound resistor

C) Carbon composition resistor

D) Carbon – film resistor

16 / 20

16) What is the formula for Quantity of electricity (Q)?

A) Voltage x Resistance

B) Current x Time

C) Current x Resistance

D) Voltage x Current

17 / 20

17) What is the value of resistance of the resistor?

A) 33000 ± 5 % Ohm

B) 3300 ± 10% Ohm

C) 330 ± 5% Ohm

D) 330000 ± 10% Ohm

18 / 20

18) Calculate the value of resistance ‘R2’ in the parallel circuit.

A) 6 Ω

B) 2 Ω

C) 4 Ω

D) 8 Ω

19 / 20

19) What is the effect of the circuit, if ‘ab’ points are shorted?

A) Circuit resistance will be zero

B) Supply voltage will exist in each branch

C) Total circuit current is equal to each branch circuit current

D) Same current will flow in all branches

20 / 20

20) 16 What electrical quantities are related in Ohm’s law? |

A) Current, voltage and resistivity

B) Voltage, resistance and current density

C) Current, voltage and resistance

D) Current, resistance and power

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