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# CBSE Physics Electromagnetic Induction Test Online

 Test Name Electromagnetic Induction Test Subject CBSE Physics Test Type MCQs Total Question 22 Total Marks 44 Total Time 20 Minutes Test Help For CBSE Physics. CBSE Board Exams. Entrance Exams. Admissions Test. Jobs Test. All Grades Exams

Central Board of Secondary Education, CBSE is a Board of Education for public and private schools, under the Union Government of India. They facilitates all exams from Grade 1 to 12th. Physics subject is part of there syllabus. We are discuss about Electromagnetic induction (or sometimes just induction) is a process where a conductor placed in a changing magnetic field or a conductor moving through a stationary magnetic field causes the production of a voltage across the conductor. In this preparation test every one will guide all topics of Physics easily for examinations purposes in all grades.

## CBSE

1. If N is the number of turns is a coil, the value of self-inductance varies as ?

Question 1 of 15

2. Eddy currents are produced when ?

Question 2 of 15

3. A varying current in a coil change form 10 A to zero in 0.5 s. If the average emf induced in the coil is 220 V, the self-inductance of the coil is ?

Question 3 of 15

4. A long solenoid has 500 turns. When a current of 2 A is passed through it, the resulting magnetic flux linked with each truth of the solenoid is 4 x 10-3 Wb. The self-inductance of the solenoid is ?

Question 4 of 15

5. A conducting circular loop is placed in a uniform magnetic field 0.04 T with its plane perpendicular to the magnetic field. the radius of the loop starts shrinking at 2 mms-1. The induced emf in the loop when the radius is 2 cm is ?

Question 5 of 15

6. A conductor of length 0.4 m is moving with a speed of 7 m/s perpendicular to a magnetic field of intensity 0.9 Wb/m2. The induced emf across the conductor is ?

Question 6 of 15

7. In an inductor of self-inductance L  = 2 mH, current changes with time according to relation i = t2e-t. At what time emf is zero ?

Question 7 of 15

8. In a region  of uniform magnetic induction B = 10-2 T, a circular coil of radius 30 cm and resistance π2 ohm is rotated about an axis which is perpendicular to the direction of B and which forms a diameter of the coil. If the coil rotates at 200 rpm the amplitude of the alternating current induced in the coil is ?

Question 8 of 15

9. If the number of turns per unit length of coil of solenoid is doubled, the self-inductance of the solenoid will ?

Question 9 of 15

10. The magnetic flux through a circuit of resistance R changes by an amount ΔΦ in a time Δt. Then the total quantity of electric charge q that passes any point in the circuit during the time Δt is represented by ?

Question 10 of 15

11. In the circuit of figure, the bulb will become suddenly bright, if ?

Question 11 of 15

12. Two coils of self-inductance 2 mH and 8 mH are placed so close together that the effective flux in one coil is completely linked with the other. The mutual inductance between theses coils is ?

Question 12 of 15

13. The current in self-inductance L = 40 Hm is to be increased uniformly form 1 A to 11 A in 4 milliseconds. The emf induced in inductor during the process is ?

Question 13 of 15

14. A rectangular coil of 20 turns and area of cross section 25 sq cm has a resistance of 100Ω. If a magnetic field which is perpendicular to the plane of coil changes at a rate of 100 t/s,the current in the coil is ?

Question 14 of 15

15. A magnetic field of 2 x 10-2 T acts at right angles to a coil of area 100 cm2, which 50 turns. The average emf induced in the coil is 0.1 V, when it is removed form the field in t sec. The value of t is ?

Question 15 of 15

 Test By Subject CBSE Test By Topics Electromagnetic Induction