Test: Electromagnetic Induction

# Test: Electromagnetic Induction

Test Description

## 10 Questions MCQ Test Basic Electrical Technology | Test: Electromagnetic Induction

Test: Electromagnetic Induction for Electrical Engineering (EE) 2023 is part of Basic Electrical Technology preparation. The Test: Electromagnetic Induction questions and answers have been prepared according to the Electrical Engineering (EE) exam syllabus.The Test: Electromagnetic Induction MCQs are made for Electrical Engineering (EE) 2023 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Electromagnetic Induction below.
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Test: Electromagnetic Induction - Question 1

### An E.M.F. can be induced by _________

Detailed Solution for Test: Electromagnetic Induction - Question 1

It is the dot product of magnetic field vector and area vector.
emf=BAcos(theta), hence if either of the three, that is, magnetic field, area or angle changes, thee emf will change.

Test: Electromagnetic Induction - Question 2

### What happens to the current in a coil while accelerating a magnet inside it?

Detailed Solution for Test: Electromagnetic Induction - Question 2

A chance in magnetic field induces an emf. When there is an emf, there has to be a current. Hence, when the magnet is moved inside a coil, the current in it increases.

Test: Electromagnetic Induction - Question 3

### What is the consequence of motor effect?

Detailed Solution for Test: Electromagnetic Induction - Question 3

Motor effect is when a current carrying conductor in a magnetic field experiences a force, hence its consequence is electromagnetic induction.

Test: Electromagnetic Induction - Question 4

The total number of magnetic field lines passing through an area is termed as?

Detailed Solution for Test: Electromagnetic Induction - Question 4

The number of magnetic flux lines per unit area is the magnetic flux, because flux is the number of field lines per unit area.

Test: Electromagnetic Induction - Question 5

The formula for induced emf is __________

Detailed Solution for Test: Electromagnetic Induction - Question 5

The formula for induced emf is: emf=Blv, where B is the magnetic field, l is the length of the conductor and v is the velocity with which it is moving in the magnetic field.

Test: Electromagnetic Induction - Question 6

If a conductor 0.2m long moves with a velocity of 0.3m/s in a magnetic field of 5T, calculate the emf induced.

Detailed Solution for Test: Electromagnetic Induction - Question 6

The formula for induced emf is: emf=Blv. Substituting the values of B, l and v from the question, we get emf=0.3V.

Test: Electromagnetic Induction - Question 7

Find the length of a conductor which is moving with a velocity 0.4m/s in a magnetic field of 8T, inducing an emf of 20V.

Detailed Solution for Test: Electromagnetic Induction - Question 7

The formula for induced emf is: emf=Blv. Substituting the values of B, emf and v from the question, we get l=6.25m.

Test: Electromagnetic Induction - Question 8

Find the strength of magnetic field in a conductor 0.5m long moving with a velocity of 10m/s, inducing an emf of 20V.

Detailed Solution for Test: Electromagnetic Induction - Question 8

The formula for induced emf is: emf=Blv. Substituting the values of l, emf and v from the question, we get B=4T.

Test: Electromagnetic Induction - Question 9

What does emf stand for?

Detailed Solution for Test: Electromagnetic Induction - Question 9

emf stands for electromotive force. It is the voltage developed by any source of electrical energy.

Test: Electromagnetic Induction - Question 10

What is emf?

Detailed Solution for Test: Electromagnetic Induction - Question 10

Electromotive force is not actually a force. It is basically a voltage. It is the voltage developed by any source of electrical energy.

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