1. In a parallel circuit, we consider _____________ instead of impedance.
A. Resistance
B. Capacitance
C. Inductance
D. Admittance
Answer: D
In a parallel circuit, we consider admittance instead of impedance, where admittance is the reciprocal of impedance.
2. In a parallel circuit, we consider admittance instead of _________
A. Resistance
B. Capacitance
C. Inductance
D. Impedance
Answer: D
In a parallel circuit, we consider admittance instead of impedance, where admittance is the reciprocal of impedance.
3. Which, among the following is the correct expression for impedance?
A. Z = Y
B. Z = 1/Y
C. Z = Y2
D. Z = 1/Y2
Answer: B
We know that impedance is the reciprocal of admittance, hence the correct expression for impedance is
Z = 1/Y.
4. Which, among the following is the correct expression for admittance?
A. Y = Z
B. Y = 1/Z
C. Y = Z2
D. Y = 1/Z2
Answer: B
We know that admittance is the reciprocal of impedance, hence the correct expression for admittance is
Y = 1/Z.
5. What is the unit of admittance?
A. ohm
B. henry
C. farad
D. ohm-1
Answer: D
The unit for admittance is ohm-1 because the unit of impedance is ohm and admittance is the reciprocal of impedance.
6. As the impedance increases, the admittance ____________
A. Increases
B. Decreases
C. Remains the same
D. Becomes zero
Answer: B
As the impedance increases, the admittance decreases because admittance is equal to 1/impedance.
7. if the impedance of a system is 4 ohm, calculate its admittance.
A. 0.25 ohm-1
B. 4 ohm-1
C. 25 ohm-1
D. 0.4 ohm-1
Answer: A
We know that: Y = 1/Z.
Substituting the value of Z from the question, we get Y = 1/4 = 0.25 = > Y = 0.25 ohm-1.
8. The admittance of a system is 10 ohm-1, calculate its impedance.
A. 10 ohm
B. 0.1 ohm
C. 1 ohm
D. 1.1 ohm
Answer: B
We know that: Z = 1/Y.
Z = 1/10 = 0.1
= > Z = 0.1 ohm.
9. In A parallel circuit, with any number of impedances, The voltage across each impedance is?
A. equal
B. divided equally
C. divided proportionally
D. zero
Answer: A
In parallel circuits, the current across the circuits varies whereas the voltage remains the same. So, the voltage across each impedance is equal in the parallel circuit.
10. In a parallel circuit, current in each impedance is_____________
A. equal
B. different
C. zero
D. infinite
Answer: B
In parallel circuits, the current across the circuits varies whereas the voltage remains the same. So, the current in each impedance is different.
