Punjab 12th Class Physics Chapter 4 Electromagnetic Induction Mcqs Test Online

Please wait...

• <<
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• >>

 

Question 1 of 9

Physics

1. In a coil current change from 2 to 4 A in 0.5 s. If the average induced emf is 8V hen coefficient of self-inductance is:

1.0.04 henry

2.0.1 henry

3.0.2 henry

4.0.8 henry

Question 1 of 9

Question 2 of 9

2. Step-up transformer has a transformation ratio of 3.2. What is the voltage in secondary, if voltage in primary is 30 V?

1.45 V

2.15 V

3.300 V

4.90 V

Question 2 of 9

Question 3 of 9

3. The device in which induced emf is statically induced emf is:

1.Transformer

2.Alternator

3.Dynamo

4.Ac generator

Question 3 of 9

Question 4 of 9

4. Eddy current is produced when:

1.A metal is kept in varying magnetic field

2.A circular coil is placed in a steady magnetic field

3.A current is passed through a circular coil

4.A metal kept in steady magnetic field

Question 4 of 9

Question 5 of 9

5. Which of the following quantities remain constant in step up transformer?

1.Voltage

2.Heat

3.Power

4.Current

Question 5 of 9

Question 6 of 9

6. The north pole of a magnet is brought near a metallic ring as shown in the fig. The direction of induced current in the ring will be:

1.Fist anti-clockwise and then clockwise

2.Clockwise

3.Anticlockwise

4.First clockwise and then anti-clockwise

Question 6 of 9

Question 7 of 9

7. For inducing emf in a coil the basic requirement is that:

1.Change in flux should link the coil

2.Coil should form a closed loop

3.Flux should link the coil

4.Both (b) and (c) are true

Question 7 of 9

Question 8 of 9

8. What is the coefficient of mutual inductance, when the magnetic flux changes by 2 x 10⁻² Wb, and change in current is 0.01 A?

1.3H

2.Zero

3.2H

4.½ H

Question 8 of 9

Question 9 of 9

9. The induced emf in a coil is proportional to:

1.Product of magnetic flux and area of the coil

2.Tate of change of magnetic flux through the coil

3.Magnetic flux through the coil

4.Area of the coil

Question 9 of 9

 Loading...

 

Other Related test

• Punjab 10th Class Math Chapter 2 Theory of Quadratic Equation Mcqs Test Online
• Punjab 10th Class Biology Chapter 1 Gaseous Exchange Mcqs Test Online
• Punjab 12th Class Urdu Mureed Pur Ka Peer Mcqs Test Online
• Punjab 9th Class Pak Study Chapter 3 Land and Environment Mcqs Test Online
• Punjab 9th Class Islamic Studies Model Paper 5 Mcqs Test Online
• Punjab 9th Class Islamiat Chapter 3 Ilm Ki Farziyat o Fazeelat Mcqs Test Online
• Punjab 10th Class Biology Chapter 9 Pharmacology Mcqs Test Online
• Punjab 12th Class Computer Chapter 1 Introduction to C ++ Language Mcqs Test Online
• Punjab 12th Class English Good Bye Mr. Chips Chapter 16 MCQs Test Online
• Punjab 12th Class Computer Chapter 3 Loops Mcqs Test Online