# Basic Electrical Engineering Questions and Answers – Parallel Impedance Circuits

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This set of Basic Electrical Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Parallel Impedance Circuits”.

1. In an impedance parallel network, the reactive component will ____________ the voltage by 90 degrees.
b) Lag
d) Depends on the circuit

Explanation: In an impedance parallel network the reactive component will either lead or lag the voltage by 90 degrees.

2. In an impedance parallel network, the reactive component will either lead or lag the voltage by _________ degrees.
a) 0
b) 90
c) 45
d) 180

Explanation: In an impedance parallel network the reactive component will either lead or lag the voltage by 90 degrees.

3. In an impedance parallel network, the reactive component will either lead or lag the ________ by 90 degrees.
a) Voltage
b) Current
c) Either voltage or current
d) Cannot be determined

Explanation: In an impedance parallel network the reactive component will either lead or lag the voltage by 90 degrees.
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4. The reactive component in an impedance parallel circuit leads the voltage when the current _________ the voltage.
b) Lags
d) Cannot be determined

Explanation: The reactive component in an impedance parallel circuit leads the voltage when the current leads the voltage.

5. The active component in an impedance parallel circuit will __________ the voltage.
b) Lags
c) Be in phase with

Explanation: The active component in an impedance parallel network will always be in phase with the voltage in the circuit.

6. The phase difference between the active component of an impedance parallel circuit and the voltage in the network is __________
a) 0
b) 90
c) 180
d) 360

Explanation: The active component in an impedance parallel network will always be in phase with the voltage in the circuit. Hence the phase difference is 0.

7. The quadrature component is also known as?
a) Active component
b) Reactive component
c) Either active or reactive component
d) Neither active nor reactive component

Explanation: The quadrature component is also known as the reactive component because the reactive component forms a quadrature with the voltage.

8. Find the expression for the current I from the given circuit. a) I=IL
b) I=IR
c) I=IL+IR
d) I=0

Explanation: I is the total current in the circuit. Since this is a parallel connection, the total current in the circuit is equal to the sum of the currents in each branch of the circuit. Hence I=IR+IL.
Explanation: We know that I=IR+IL.
10=IR+8 => IR=2A.

10. Find the total current if IL=2A and IR=8A. a) 3A
b) -3A
c) 7A
d) 10A

Explanation: We know that I=IR+IL.
I=8+2=10A.

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To practice all areas of Basic Electrical Engineering, here is complete set of 1000+ Multiple Choice Questions and Answers. 