Electrician Theory Test 1 I Year

Electrician I Year Test 1

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1 / 20

1) Which is the diamagnetic substance?

A) Platinum

B) Steel

C) Air

D) Water

2 / 20

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

A) Temperature

B) Length

C) Resistivity

D) Area of cross section

3 / 20

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

A) LT = 1 𝐿1+𝐿2+𝐿3

B) LT = L1 x L2 x L3

C) LT = L1 + L2 + L3

D) LT = 1 𝐿1 + 1 𝐿2 + 1 𝐿3

4 / 20

4) Which is the application of series circuit?

A) Lighting circuits in home

B) Voltmeter connection

C) Shunt resistor in ammeter

D) Multiplier resistor of a voltmeter

5 / 20

5) What is the unit of capacitance?

A) Coulomb

B) Henry

C) Mho

D) Farad

6 / 20

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

A) 15 volt

B) 10 volt

C) 20 volt

D) 25 volt

7 / 20

7) Calculate the total capacitance value in the circuit.

A) 70 µF

B) 6 µF

C) 30 µF

D) 0.16 µF

8 / 20

8) What is the name of the resistor?

A) Carbon composition resistor

B) Wire wound resistor

C) Metal film resistor

D) Carbon – film resistor

9 / 20

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

A) Current x Resistance

B) Voltage x Resistance

C) Voltage x Current

D) Current x Time

10 / 20

10) Which factor affects the polarity of the electromagnet?

A) Direction of current

B) Length of the coil

C) Strength of the magnetic field

D) Strength of current

11 / 20

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

A) Ampere / turns

B) Ampere - turns

C) Ampere / m2

D) Ampere - m

12 / 20

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

A) 3300 ± 10% Ohm

B) 330 ± 5% Ohm

C) 33000 ± 5 % Ohm

D) 330000 ± 10% Ohm

13 / 20

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

A) Eureka

B) Copper

C) Manganin

D) Mica

14 / 20

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

A) 2 Ω

B) 6 Ω

C) 8 Ω

D) 4 Ω

15 / 20

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

A) Voltage, resistance and current density

B) Current, voltage and resistivity

C) Current, resistance and power

D) Current, voltage and resistance

16 / 20

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

A) 62.5

B) 31.25

C) 625

D) 312.5

17 / 20

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

A) Infinity

B) Zero

C) Low

D) High

18 / 20

18) 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) 560 Ω

C) 450 Ω

D) 220 Ω

19 / 20

19) How the value of capacitance can be decreased?

A) Using high dielectric constant material

B) Increasing the resistance of the plates

C) Increasing the plate area

D) Increasing the distance between the plates

20 / 20

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

A) Supply voltage will exist in each branch

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

C) Circuit resistance will be zero

D) Same current will flow in all branches

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