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Questions and Answers
When the current in a coil changes from 2 A to 4 A in 0.05 s, an emf of 8 V is induced in the coil. The coefficient of self-induction of the coil is:
When the current in a coil changes from 2 A to 4 A in 0.05 s, an emf of 8 V is induced in the coil. The coefficient of self-induction of the coil is:
- 0.4 H
- 0.2 H
- 0.1 H
- 0.8 H (correct)
An emf of 15 V is applied in a circuit containing 5 H inductance and 10 $\Omega$ resistance. The ratio of the currents at time t = $\infty$ and at t = 1 s is:
An emf of 15 V is applied in a circuit containing 5 H inductance and 10 $\Omega$ resistance. The ratio of the currents at time t = $\infty$ and at t = 1 s is:
- e^2
- 1 / (e^1/2 - 1)
- e^1/2 - 1
- e^1/2 / (e^1/2 - 1) (correct)
- e^1/2
Flashcards
Self-induction coefficient
Self-induction coefficient
The property of a coil that opposes a change in current flowing through it.
Inductive Circuit with Resistance
Inductive Circuit with Resistance
A circuit containing inductance and resistance, where current changes over time.
Study Notes
Self-Induction Problem
- A change in current (2A to 4A) in a coil over 0.05 seconds induces an emf of 8V
- The coil's self-inductance is 0.8H
RL Circuit Problem
- An emf of 15V is applied to a circuit with 5H inductance and 10Ω resistance
- The ratio of currents at t = ∞ and t = 1s is e1/2 / (e1/2 - 1) or approximately 1.65
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Description
This quiz covers concepts of self-induction and analysis of RL circuits. It includes problems involving changes in current, induced emf, and the behavior of currents over time in RL circuits. Test your understanding of these fundamental electrical principles.
