Electrician Theory Test 1 I Year

Electrician I Year Test 1

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1 / 20

1) Which factor affects the polarity of the electromagnet?

A) Direction of current

B) Strength of current

C) Strength of the magnetic field

D) Length of the coil

2 / 20

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

A) 20 volt

B) 10 volt

C) 15 volt

D) 25 volt

3 / 20

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

A) Current x Time

B) Current x Resistance

C) Voltage x Current

D) Voltage x Resistance

4 / 20

4) What is the unit of capacitance?

A) Farad

B) Coulomb

C) Henry

D) Mho

5 / 20

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

A) 62.5

B) 312.5

C) 625

D) 31.25

6 / 20

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

A) Area of cross section

B) Length

C) Temperature

D) Resistivity

7 / 20

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

A) 2 Ω

B) 8 Ω

C) 4 Ω

D) 6 Ω

8 / 20

8) 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

9 / 20

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

A) Ampere / m2

B) Ampere - turns

C) Ampere / turns

D) Ampere - m

10 / 20

10) How the value of capacitance can be decreased?

A) Increasing the plate area

B) Increasing the distance between the plates

C) Using high dielectric constant material

D) Increasing the resistance of the plates

11 / 20

11) Which is the diamagnetic substance?

A) Steel

B) Water

C) Platinum

D) Air

12 / 20

12) 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 x L2 x L3

D) LT = L1 + L2 + L3

13 / 20

13) 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

14 / 20

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

A) Zero

B) Infinity

C) Low

D) High

15 / 20

15) Which is the application of series circuit?

A) Shunt resistor in ammeter

B) Multiplier resistor of a voltmeter

C) Voltmeter connection

D) Lighting circuits in home

16 / 20

16) What is the name of the resistor?

A) Wire wound resistor

B) Carbon composition resistor

C) Metal film resistor

D) Carbon – film resistor

17 / 20

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

A) Eureka

B) Manganin

C) Copper

D) Mica

18 / 20

18) Calculate the total capacitance value in the circuit.

A) 0.16 µF

B) 6 µF

C) 30 µF

D) 70 µF

19 / 20

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

A) Same current will flow in all branches

B) Circuit resistance will be zero

C) Supply voltage will exist in each branch

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

20 / 20

20) 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

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