MCQ Questions for Class 12 Physics Chapter 6 Electromagnetic Induction Part-1 with Answers

Electromagnetic Induction Part-1 Class 12 Physics MCQs Questions with Answers

Check the below NCERT MCQ Questions for Class 12 Physics Chapter 6 Electromagnetic Induction Part-1 with Answers Pdf free download. MCQ Questions for Class 12 Physics with Answers were prepared based on the latest exam pattern. We have Provided Electromagnetic Induction Part-1 Class 12 Physics MCQs Questions with Answers to help students understand the concept very well.

Class 12 Physics Chapter 6 Quiz

Class 12 Physics Chapter 6 MCQ Online Test

You can refer to NCERT Solutions for Class 12 Physics Chapter 6 Electromagnetic Induction Part-1 to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.

Electromagnetic Induction Part-1 Class 12 Physics MCQ online test

Q1.	The coupling co-efficient of the perfectly coupled coils is:
	A.Zero
	B.1
	C.slightly more than 1
	D.infinite

Ans: 1

Q2.	1 henry is equal to :
	A.\(\frac{weber}{ampere}\)
	B.\(\frac{weber}{Volt}\)
	C.weber ampere
	D.None of these

Ans: \(\frac{weber}{ampere}\)

Q3.	The magnetic field is parallel to a surface, then the magnetic flux through the surface is :
	A.zero
	B.small but not zero
	C.infinite
	D.large but not infinite

Ans: small but not zero

Q4.	In the expression e = –\(\frac{d∅}{dt}\), the -ve sign signifies:
	A.The induced emf is produced only when magnetic flux decreases
	B.The induced emf opposes the change in the magnetic flux
	C.The induced emf is opposite to the direction of the flux
	D.None of these

Ans: The induced emf opposes the change in the magnetic flux

Q5.	An e^– and a p^– are moving parallel to each other in a magnetic field. The magnetic force acting on the p⁺ is:
	A.1840 times that on e^–
	B.less than that of e^–
	C.same as that of e^–
	D.slightly more than that of e^–

Ans: same as that of e^–

Q6.	Which of the following is not equal to a henry?
	A.\(\frac{Volt second}{ampere}\)
	B.\(\frac{Volt second^2}{Coulomb}\)
	C.\(\frac{Volt^2 second}{Coulomb}\)
	D.\(\frac{Jole second}{Coulomb^2}\)

Ans: \(\frac{Volt^2 second}{Coulomb}\)

Q7.	A transformer is used to light 100 W and 110 V lamp from a 220 V mains. If the main current is 0.5 A. Then the efficiency of the transformer is:
	A.11%
	B.50%
	C.80%
	D.90%

Ans: 90%

Q8.	The magnetic flux (∅) linked with a coil is related to the number of turns (N) ofthe coil as:
	A.f ∝ N
	B.f ∝ N^-1
	C.f ∝ N²
	D.f ∝ N^-2

Ans: f ∝ N

Q9.	The magnetic flux (∅) lined with a coil is related to its area (s) as:
	A.∅ ∝ s
	B.∅ ∝ s²
	C.∅ ∝ s^1/2
	D.∅ ∝ s^-1/2

Ans: ∅ ∝ s

Q10.	If the magnetic flux linked with a coil through which a current off ampere is set up is ∅, then the coefficient of self-inductance of the coil is:
	A.\(\frac{l}{∅}\)
	B.\(\frac{∅}{l}\)
	C.∅l
	D.None of these

Ans: \(\frac{∅}{l}\)

Q11.	In a uniform magnetic field B, a wire in the form of a semicircle of radius r rotated about the diameter of the circle with angular frequency ‘ω’. The axis of rotation is perpendicular to the field. If the total resistance of the circuit is R the mean power generated per period of rotation is :
	A.\(\frac{Bπr^2ω}{2R}\)
	B.\(\frac{(Bπr^2ω)^2}{8R}\)
	C.\(\frac{(Bπrω)^2}{2R}\)
	D.\(\frac{(Bπrω^2)^2}{8R}\)

Ans: \(\frac{(Bπr^2ω)^2}{8R}\)

Q12.	The role of inductance is equivalent to:
	A.inertia
	B.force
	C.energy
	D.momentum

Ans: inertia

Q13.	A metal conductor of length 1 m rotates vertically about one of its ends at angular velocity 5 rad s^-1 . If the horizontal component of earth’s magnetism is 2 × 10^-5 T, then e.m.f. developed between the two ends of the conductor is:
	A.5 µV
	B.50 µV
	C.5 mV
	D.50 mV

Ans: 5 µV

Q14.	coil of L = 8.4 mH and R = 6 Ω is connected to a 12 V battery. The current in the coil is 1.0 A at approx’time of:
	A.500 s
	B.20 s
	C.35 ms
	D.1 ms

Ans: 1 ms

Q15.	If I current is flowing inductance L, then the dimension of \(\frac{3}{2}\) LI² is equivalent to:
	A.charge
	B.force
	C.momentum
	D.energy

Ans: momentum

Q16.	The phase difference between the flux linkage and the emf in a rotating coil in a uniform magnetic field is:
	A.zero
	B.\(\frac{π}{2}\)
	C.\(\frac{π}{4}\)
	D.π