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Assignment for Class 12 Physics Chapter 6 Electromagnetic Induction
Class 12 Physics students should refer to the following printable assignment in Pdf for Chapter 6 Electromagnetic Induction in Class 12. This test paper with questions and answers for Class 12 Physics will be very useful for exams and help you to score good marks
Chapter 6 Electromagnetic Induction Class 12 Physics Assignment
Electromagnetic Induction Alternating Currents MCQ Questions with Answers Class 12 Physics
Question- The self inductance associated with a coil is independent of
(a) current
(b) time
(c) induced voltage
(d) resistance of coil
Answer-(d)
Question-A conducting loop is placed in a uniform magnetic field with its plane perpendicular to the field. An e.m.f. is induced in the loop, if
(a) it is translated.
(b) it is rotated about its axis.
(c) both (a) and (b).
(d) it is rotated about its diameter.
Answer-(d)
Question-An induced e.m.f. is produced when a magnet is plunged into a coil. The strength of the induced e.m.f. is independent of
(a) the strength of the magnet
(b) number of turns of coil
(c) the resistivity of the wire of the coil
(d) speed with which the magnet is moved
Answer-(c)
Question-According to Faraday’s law of electromagnetic induction
(a) electric field is produced by time varying magnetic flux.
(b) magnetic field is produced by time varying electric flux.
(c) magnetic field is associated with a moving charge.
(d) None of these
Answer-(a)
Question-Mutual induction is the production of induced e.m.f. in a coil due to the changes of current in the
(a) same coil
(b) neighbouring coil
(c) both (a) and (b)
(d) neither (a) nor (b)
Answer-(b)
Question-A moving conductor coil produces an induced e.m.f. This is in accordance with
(a) Lenz’s law
(b) Faraday’s law
(c) Coulomb’s law
(d) Ampere’s law
Answer-(b)
Question-Direction of current induced in a wire moving in a magnetic field is found using
(a) Fleming’s left found rule
(b) Fleming’s right hand rule
(c) Ampere’s rule
(d) Right hand clasp rule
Answer-(b)
Question-A coil of insulated wire is connected to a battery. If it is taken to galvanometer, its pointer is deflected, because
(a) the induced current is produced
(b) the coil acts like a magnet
(c) the number of turns in the coil of the galvanometer are changed
(d) None of these
Answer-(a)
Question-Magnetic flux is
(a) total charge per unit area.
(b) total current through a surface.
(c) total number of magnetic field lines passing normally through given area.
(d) total e.m.f. in closed circuit.
Answer-(a)
Question-In electromagnetic induction, the induced charge is independent of
(a) change of flux
(b) time.
(c) resistance of the coil
(d) None of these
Answer-(b)
Question-The mutual inductance between two coils depends on
(a) medium between the coils
(b) separation between the two coils
(c) orientation of the two coils
(d) All of the above
Answer-(d)
Question- Len’z law provides a relation between
(a) current and magnetic field.
(b) induced e.m.f. and the magnetic flux.
(c) force on a conductor in magnetic field.
(d) current and induced e.m.f.
Answer-(b)
Question-A coil of insulated wire is connected to a battery. If it is connected to galvanometer, its pointer is deflected, because
(a) induced current is set up
(b) no induced current is set up
(c) the coil behaves as a magnet
(d) the number of turns is changed
Answer-(a)
Question-Whenever the magnetic flux linked with an electric circuit changes, an emf is induced in the circuit. This is called
(a) electromagnetic induction
(b) lenz’s law
(c) hysteresis loss
(d) kirchhoff’s laws
Answer-(a)
Question-A cylindrical bar magnet is kept along the axis of a circular coil. On rotating the magnet about its axis, the coil will have induced in it
(a) a current
(b) no current
(c) only an e.m.f.
(d) both an e.m.f. and a current
Answer-(b)
Question-A circular coil expands radially in a region of magnetic field and no electromotive force is produced in the coil This is because
(a) the magnetic field is constant
(b) the magnetic field is in the same plane as the circular coil and it may or may not vary.
(c) the magnetic field has a perpendicular (to the plane of the coil) component whose magnitude is decreasing suitably.
(d) both (b) and (c).
Answer-(d)
Question-Whenever, current is changed in a coil, an induced e.m.f. is produced in the same coil. This property of the coil is due to
(a) mutual induction
(b) self induction
(c) eddy currents
(d) hysteresis
Answer-(b)
Question-An inductor may store energy in
(a) its electric field
(b) its coils
(c) its magnetic field
(d) both in electric and magnetic fields
Answer-(c)
Question-Which of the following does not use the application of eddy current ?
(a) Electric power meters
(b) Induction furnace
(c) LED lights
(d) Magnetic brakes in trains
Answer-(c)
Question-Induction furnace make use of
(a) self induction
(b) mutual induction
(c) eddy current
(d) None of these
Answer-(c)
Question-The emf is induced in a single, isolated coil due to ...A... of flux through the coil by means of varying the current through the same coil. This phenomenon is called ...B... Here, A and B refer to
(a) constancy, mutual induction
(b) change, self induction
(c) constancy, self induction
(d) changes, mutual induction
Answer-(b)
Question-The self inductance of a coil is a measure of
(a) electrical inertia
(b) electrical friction
(c) induced e.m.f.
(d) induced current
Answer-(a)
Question-Lenz’s law is a consequence of the law of conservation of
(a) charge
(b) mass
(c) energy
(d) momentum
Answer- (c)
Question- The coils in resistance boxes are made from doubled insulated wire to nullify the effect of
(a) heating
(b) magnetism
(c) pressure
(d) self induced e.m.f.
Answer-(d)
Question-Two pure inductors each of self inductance L are connected in series, the net inductance is
(a) L
(b) 2 L
(c) L/2
(d) L/4
Answer-(b)
Question-The self inductance associated with a coil is independent of
(a) current
(b) induced voltage
(c) time
(d) resistance of a coil
Answer-(d)
Question- Induction coil is an instrument based on the principle of
(a) electromagnetic induction
(b) mutual induction
(c) self induction
(d) induction furnace.
Answer-(b)
Question-Production of induced e.m.f. in a coil due to the changes of current in the same coil is
(a) self induction
(b) mutual induction
(c) dynamo
(d) none of these
Answer-(a)
Question- Henry is the S.I. unit of
(a) resistance
(b) capacity
(c) inductance
(d) current
Answer-(c)
Question- Eddy currents are produced when
(a) A metal is kept in varying magnetic field
(b) A metal is kept in the steady magnetic field
(c) A circular coil is placed in a magnetic field
(d) Through a circular coil, current is passed
Answer-(a)
Question-A magnet is moved towards a coil (i) quickly (ii) slowly, then the induced e.m.f. is
(a) larger in case (i)
(b) smaller in case (i)
(c) equal to both the cases
(d) larger or smaller depending upon the radius of the coil
Answer-(a)
Question- When current i passes through an inductor of self inductance L, energy stored in it is 1/2. L i2. This is stored in the
(a) current
(b) voltage
(c) magnetic field
(d) electric field
Answer-(c)
Question-The polarity of induced emf is given by
(a) Ampere's circuital law
(b) Biot-Savart law
(c) Lenz’s law
(d) Fleming's right hand rule
Answer-(c)
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CBSE Class 12 Physics Chapter 6 Electromagnetic Induction Assignment
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Assignment for Physics CBSE Class 12 Chapter 6 Electromagnetic Induction
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Chapter 6 Electromagnetic Induction Assignment Physics CBSE Class 12
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Chapter 6 Electromagnetic Induction Assignment CBSE Class 12 Physics
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CBSE Physics Class 12 Chapter 6 Electromagnetic Induction Assignment
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