| 1 |
Changing magnetic field in a closed circuit can induce: |
e.m.f
Electric current
Force
Both A and B
|
| 2 |
The true ratio of a transformer is 10. It means: |
Vs = 10Vp
Ns = Np/10
Ns = 10NP
VS= Vp/10
|
| 3 |
In electric motor, the brushes are made of: |
Lead
Graphite
Iron
Wood
|
| 4 |
Electric motor converts electrical energy into: |
Chemical energy
Solar energy
Heat energy
Mechanical energy
|
| 5 |
Number of poles in a magnet is: |
One
Two
Three
Unlimited
|
| 6 |
A.C generator works on the principle of: |
Electrostatic induction
Electromagnetic induction
Law of gravitation
Third law of motion
|
| 7 |
When an electric current passes through a conductor, which field is produced around it? |
Electric field
Magnetic field
Gravitational field
Electrostatic field
|
| 8 |
Magnetic effect of electric current was first discovered by: |
Faraday
Ampere
Volta
Lenz
|
.gif)
Home
News
Colleges
Courses
Admission
Lectures
Online Test
Past Papers
Date Sheets
Results
Study Abroad
Jobs
Tutors
More
Apps
