Electrician Theory Test 1 I Year

Electrician I Year Test 1

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1 / 20

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

A) 6 Ω

B) 4 Ω

C) 8 Ω

D) 2 Ω

2 / 20

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

A) Length

B) Temperature

C) Resistivity

D) Area of cross section

3 / 20

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

A) 15 volt

B) 25 volt

C) 10 volt

D) 20 volt

4 / 20

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

A) 330000 ± 10% Ohm

B) 33000 ± 5 % Ohm

C) 3300 ± 10% Ohm

D) 330 ± 5% Ohm

5 / 20

5) 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 = 1 𝐿1+𝐿2+𝐿3

C) LT = L1 + L2 + L3

D) LT = L1 x L2 x L3

6 / 20

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

A) Supply voltage will exist in each branch

B) Circuit resistance will be zero

C) Same current will flow in all branches

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

7 / 20

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

A) Infinity

B) Low

C) High

D) Zero

8 / 20

8) How the value of capacitance can be decreased?

A) Increasing the distance between the plates

B) Using high dielectric constant material

C) Increasing the resistance of the plates

D) Increasing the plate area

9 / 20

9) Which is the diamagnetic substance?

A) Water

B) Steel

C) Air

D) Platinum

10 / 20

10) What is the unit of capacitance?

A) Farad

B) Henry

C) Mho

D) Coulomb

11 / 20

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

A) Manganin

B) Eureka

C) Copper

D) Mica

12 / 20

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

A) Voltage x Current

B) Current x Resistance

C) Voltage x Resistance

D) Current x Time

13 / 20

13) Which factor affects the polarity of the electromagnet?

A) Strength of current

B) Direction of current

C) Length of the coil

D) Strength of the magnetic field

14 / 20

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

A) Ampere - turns

B) Ampere - m

C) Ampere / m2

D) Ampere / turns

15 / 20

15) 16 What electrical quantities are related in Ohm’s law? |

A) Current, voltage and resistance

B) Current, voltage and resistivity

C) Current, resistance and power

D) Voltage, resistance and current density

16 / 20

16) 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) 50 Ω

B) 450 Ω

C) 220 Ω

D) 560 Ω

17 / 20

17) Calculate the total capacitance value in the circuit.

A) 70 µF

B) 30 µF

C) 6 µF

D) 0.16 µF

18 / 20

18) What is the name of the resistor?

A) Carbon composition resistor

B) Metal film resistor

C) Wire wound resistor

D) Carbon – film resistor

19 / 20

19) Which is the application of series circuit?

A) Multiplier resistor of a voltmeter

B) Lighting circuits in home

C) Shunt resistor in ammeter

D) Voltmeter connection

20 / 20

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

A) 62.5

B) 312.5

C) 625

D) 31.25

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