Basic Electrical Engineering Mock Test 9

10%

Question 1 of 10

1. If in an alternating current circuit, impedance is 26 ohm, capacitive reactance is 24 ohm, what is the resistance?

10 ohm

12 ohm

23 ohm

25 ohm

Question 1 of 10

Question 2 of 10

2. When one sine wave passes through the zero following the other, it is _________

Leading

Either leading or lagging

Lagging

Neither leading nor lagging

Question 2 of 10

Question 3 of 10

3. What is sinϕ from impedance triangle?

X_L/Z

R/Z

Z/R

X_L/R

Question 3 of 10

Question 4 of 10

4. If the phasors are drawn to represent the maximum values instead of the rms values, what would happen to the phase angle between quantities?

Increases

Remains constant

Becomes zero

Decreases

Question 4 of 10

Question 5 of 10

5. For addition and subtraction of phasors, we use the _________ form.

Rectangular

Either rectangular or polar

Polar

Neither rectangular nor polar

Question 5 of 10

Question 6 of 10

6. A resistance of 7 ohm is connected in series with an inductance of 31.8mH. The circuit is connected to a 100V 50Hz sinusoidal supply. Calculate the voltage across the inductor.

65V

82V

52V

76V

Question 6 of 10

Question 7 of 10

7. In an RLC series phasor, we start drawing the phasor from which quantity?

Impedance

Resistance

Current

Voltage

Question 7 of 10

Question 8 of 10

8. A resistance of 7 ohm is connected in series with an inductance of 31.8mH. The circuit is connected to a 100V 50Hz sinusoidal supply. Calculate the current in the circuit.

8.2A

2.2A

4.2A

6.2A

Question 8 of 10

Question 9 of 10

9. When is tanφ positive?

When inductive reactance is zero

When inductive reactance is less than capacitive reactance

When inductive reactance is equal to capacitive reactance

When inductive reactance is greater than capacitive reactance