3 Lecture

10 mcqs for 'Inductance in Parallel' with a solution and multiple options

In a parallel inductance circuit, how does the total inductance change as more inductors are added?

a) Increases

b) Decreases

c) Remains the same

Answer: b) Decreases

What is the formula for calculating the total inductance of inductors in parallel?

a) Ltotal = L1 + L2

b) Ltotal = L1 x L2

c) Ltotal = L1 / L2

Answer: a) Ltotal = L1 + L2

How does the current divide between inductors in a parallel inductance circuit?

a) Equally

b) According to their individual impedances

c) Inversely proportional to their inductances

Answer: b) According to their individual impedances

In a parallel inductance circuit, what is the phase difference between the current and voltage across an inductor?

a) 0 degrees

b) 45 degrees

c) 90 degrees

Answer: c) 90 degrees

How does the addition of a capacitor affect the impedance in a parallel inductance circuit?

a) Increases the impedance

b) Decreases the impedance

c) Does not affect the impedance

Answer: b) Decreases the impedance

Can the total inductance of inductors in parallel ever be greater than the value of the individual inductors?

a) Yes

b) No

Answer: b) No

How does the inductance in a parallel circuit change as the frequency increases?

a) Increases

b) Decreases

c) Remains the same

Answer: b) Decreases

What is the formula for calculating the equivalent impedance of inductors in parallel?

a) Z = Z1 + Z2

b) Z = Z1 x Z2

c) Z = 1/(1/Z1 + 1/Z2)

Answer: c) Z = 1/(1/Z1 + 1/Z2)

What is the advantage of using inductors in parallel in a circuit?

a) Increases the overall inductance

b) Decreases the current handling capacity

c) Increases the current handling capacity while decreasing the overall inductance

Answer: c) Increases the current handling capacity while decreasing the overall inductance

In a parallel inductance circuit, what is the relationship between the impedance and the frequency?

a) Impedance increases as frequency increases

b) Impedance decreases as frequency increases

c) Impedance remains the same as frequency increases

Answer: b) Impedance decreases as frequency increases

What is inductance in parallel?

Answer: Inductance in parallel refers to a circuit configuration where two or more inductors are connected across the same voltage source in parallel, such that the voltage across each inductor is the same.

What happens to the total inductance of a circuit when inductors are connected in parallel?

Answer: The total inductance of a circuit decreases when inductors are connected in parallel.

How can you calculate the total inductance of a circuit with inductors in parallel?

Answer: The total inductance of a circuit with inductors in parallel can be calculated using the formula: 1/L(total) = 1/L(1) + 1/L(2) + ... + 1/L(n), where L(1), L(2), ... L(n) are the individual inductances.

What is the unit of inductance?

Answer: The unit of inductance is Henry (H).

What is the effect of increasing the number of inductors in parallel on the total current in the circuit?

Answer: Increasing the number of inductors in parallel increases the total current in the circuit.

What is the phase relationship between the voltage and current in an inductor in parallel?

Answer: The voltage and current in an inductor in parallel are out of phase, with the current lagging behind the voltage by 90 degrees.

What is the effect of increasing the frequency of the input signal on the total inductance of a circuit with inductors in parallel?

Answer: Increasing the frequency of the input signal decreases the total inductance of the circuit with inductors in parallel.

How can you increase the total inductance of a circuit with inductors in parallel?

Answer: The total inductance of a circuit with inductors in parallel can be increased by adding more inductors in parallel.

What is the effect of adding a resistor in parallel to a circuit with inductors in parallel?

Answer: Adding a resistor in parallel to a circuit with inductors in parallel decreases the overall impedance of the circuit.

What is the difference between inductance in parallel and inductance in series?

Answer: Inductance in parallel refers to the configuration where two or more inductors are connected across the same voltage source in parallel, while inductance in series refers to the configuration where two or more inductors are connected end-to-end, such that the same current flows through each inductor.

Inductance in parallel

Inductors are passive circuit components that store energy in the form of a magnetic field. They are widely used in various electronic circuits to filter out unwanted signals and to create resonant circuits. In circuits with multiple inductors, the inductors can be connected in series or parallel depending on the circuit requirements. When inductors are connected in parallel, the equivalent inductance of the circuit is different from the individual inductances of the inductors. The equivalent inductance is calculated based on the number of inductors and their individual values. In this article, we will discuss the behavior of inductance in parallel and its effects on the overall circuit performance. When two inductors are connected in parallel, the equivalent inductance of the circuit is calculated using the following formula: 1/L = 1/L1 + 1/L2 Where L is the equivalent inductance of the circuit, L1 and L2 are the individual inductances of the inductors. In this case, the equivalent inductance of the circuit is always less than the individual inductances of the inductors. This is because the magnetic fields of the two inductors interact with each other, causing a decrease in the overall inductance. As more inductors are added in parallel, the equivalent inductance of the circuit decreases further. The behavior of inductance in parallel can be best explained by looking at the current flowing through the inductors. In a parallel circuit, the voltage across all the inductors is the same, but the current through each inductor is different. When inductors are connected in parallel, the total current through the circuit is the sum of the individual currents through each inductor. The individual currents through each inductor depend on the resistance and reactance of the circuit. In a circuit with multiple inductors, the total resistance of the circuit decreases when inductors are connected in parallel. This is because the current through each inductor is less than the current that would flow through a single inductor in the same circuit. The reactance of the circuit also changes when inductors are connected in parallel. The reactance is inversely proportional to the equivalent inductance of the circuit. As more inductors are added in parallel, the equivalent inductance decreases, causing an increase in the reactance of the circuit. The effect of inductance in parallel on the circuit performance can be seen in various electronic circuits. For example, in filters, inductors are used to block high-frequency signals and allow low-frequency signals to pass through. When inductors are connected in parallel, the overall inductance of the filter decreases, causing an increase in the frequency of the signal that can pass through the filter. In resonant circuits, inductors are used to create a resonant frequency for the circuit. When inductors are connected in parallel, the equivalent inductance of the circuit decreases, causing an increase in the resonant frequency. This can be beneficial in some applications where a higher resonant frequency is required. In conclusion, inductors are important passive components in electronic circuits. When inductors are connected in parallel, the equivalent inductance of the circuit decreases, causing an increase in the reactance of the circuit. The behavior of inductance in parallel can be seen in various electronic circuits, and it is important to understand its effects on the circuit performance.