Torque on Current Carrying Loop, Class 12 Physics Sample Papers

1. There will be total 10 MCQ in this test.
2. Please keep a pen and paper ready for rough work but keep your books away.
3. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number.
4. No negative marking for incorrect choice.
5. Please click on “Finish the Test” when you want to exit.
6. All the best – Happy Studying

1. A device which converts electrical energy into mechanical energy is called:

Electric generator

Electric motor

Electric transformer

Electric conductor

Your comments:

Question 1 of 10

2. A conductor of length l, carrying current I and placed in a magnetic field B experiences a force F given by

A

B

C

D

Your comments:

Question 2 of 10

3. A wire 40 cm long carries a current of 20 A. It is bent into a loop and placed with its plane perpendicular to a magnetic field having a flux density of 0.52 T. What is the torque on the loop if it is bent into a square.

010.40 N-m

01.040 N-m

0.01040 N-m

0.1040 N-m

Your comments:

Question 3 of 10

4. A charge moves through a magnetic field with a certain velocity. Direction of force can be obtained by applying :

Fleming's right hand rule

Cork screw rule

Rule of cross product

Ampere's rule

Your comments:

Question 4 of 10

5. A plane square loop PQRS of side 'a' made of thin copper wire has 'n' turns and it carries a direct current 'I' ampere in the direction shown in the adjoining figure. This wire loop is placed in a magnetic field of flux density 'B' tesla, which is directed perpendicularly in to the plane of the loop. What is the torque acting on the loop?

nIaB

Zero

IaB

nIa²B

Your comments:

Question 5 of 10

6. Torque on a current loop is by = n( x ). With is  here?

Magnetic moment

Magnetic force

Magnetic field

Magnetic flux

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Question 6 of 10

7. A wire of length l, carrying current is bent into a loop and placed with its plane perpendicular to a magnetic field. In which of the following shapes, is the torque acting on the loop maximum?

Rectangle

Circle

Square

Equilateral triangle

Your comments:

Question 7 of 10

8. A current loop of area 0.01m² and carrying a current of 100 A is held parallel to a magnetic field of intensity 0.1 tesla. The torque in Nm acting on the loop is:

0.1

0.001

1.1

Your comments:

Question 8 of 10

9. A coil in shape of an equilateral triangle if side '|' is suspended between the pole pieces of a permanent magnet such that the magnetic field B is in the plane of the coil. If due to a current I in the triangle, a torque Syntax error from line 1 column 49 to line 1 column 73. Unexpected 'mathsize'. acts on it, the side of the triangle is:

A

B

C

D

Your comments:

Question 9 of 10

10. A charge of +10µcoulomb enters a uniform magnetic field parallel to its direction. What will happen to the charge?

Move undeviated with constant velocity.

Continue to move with acceleration

Perform circular motion in a plane parallel to the field.

Perform circular motion in a plane perpendicular to the field.

Your comments:

Question 10 of 10

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