QuestionJune 28, 2025

Which of the following will induce a greater emf in the secondary coil of a generator? A constant potential in the primary coil. A greater number of loops in the primary coil. A fewer number of loops in the secondary coil. A smaller area in the secondary coil.

Which of the following will induce a greater emf in the secondary coil of a generator? A constant potential in the primary coil. A greater number of loops in the primary coil. A fewer number of loops in the secondary coil. A smaller area in the secondary coil.
Which of the following will induce a greater emf in the secondary coil of a generator? A constant potential in the primary coil. A greater number of loops in the primary coil. A fewer number of loops in the secondary coil. A smaller area in the secondary coil.

Solution
3.3(238 votes)

Answer

None of the options will induce a greater emf in the secondary coil. Explanation 1. Analyze the factors affecting emf According to Faraday's Law of Electromagnetic Induction, the induced emf in a coil is given by ** \text{emf} = -N \frac{d\Phi}{dt} **, where N is the number of loops and \Phi is the magnetic flux. A change in magnetic flux is necessary for inducing emf. 2. Evaluate each option - A constant potential in the primary coil does not change magnetic flux, so it induces no emf. - A greater number of loops in the primary coil increases magnetic flux linkage but doesn't directly affect the secondary coil's emf unless there's a changing current. - A fewer number of loops in the secondary coil decreases the induced emf as N is smaller. - A smaller area in the secondary coil reduces the magnetic flux through it, thus reducing the induced emf.

Explanation

1. Analyze the factors affecting emf<br /> According to Faraday's Law of Electromagnetic Induction, the induced emf in a coil is given by **$ \text{emf} = -N \frac{d\Phi}{dt} $**, where $N$ is the number of loops and $\Phi$ is the magnetic flux. A change in magnetic flux is necessary for inducing emf.<br /><br />2. Evaluate each option<br /> - A constant potential in the primary coil does not change magnetic flux, so it induces no emf.<br /> - A greater number of loops in the primary coil increases magnetic flux linkage but doesn't directly affect the secondary coil's emf unless there's a changing current.<br /> - A fewer number of loops in the secondary coil decreases the induced emf as $N$ is smaller.<br /> - A smaller area in the secondary coil reduces the magnetic flux through it, thus reducing the induced emf.
Click to rate:

Similar Questions