Refer to JEE Physics Electromagnetic Induction MCQs Set A provided below available for download in Pdf. The MCQ Questions for Full Syllabus Physics with answers are aligned as per the latest syllabus and exam pattern suggested by JEE (Main), NCERT and KVS. Multiple Choice Questions for Electromagnetic Induction are an important part of exams for Full Syllabus Physics and if practiced properly can help you to improve your understanding and get higher marks. Refer to more Chapter-wise MCQs for JEE (Main) Full Syllabus Physics and also download more latest study material for all subjects
MCQ for Full Syllabus Physics Electromagnetic Induction
Full Syllabus Physics students should refer to the following multiple-choice questions with answers for Electromagnetic Induction in Full Syllabus.
Electromagnetic Induction MCQ Questions Full Syllabus Physics with Answers
Question: Dimensional formula of magnetic flux is
- a)
- b)
- c)
- d)
Answer:
Question: An emf can be induced in stationary coil if it is kept in
- a) Time varying magnetic field
- b) Stationary uniform magnetic field
- c) Stationary nonuniform magnetic field
- d) Not possible
Answer: Time varying magnetic field
Question: The induced e.m.f. in a coil does not depend on
- a) The resistance of the circuit
- b) The rate of change of magnetic flux
- c) The number of turns in the coil
- d) Time of rotation
Answer: The resistance of the circuit
Question:
- a) 0.2A
- b) 0.6A
- c) 0.8A
- d) 1.2A
Answer: 0.2A
Question: A cylindrical 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) No current
- b) A current
- c) Only an e.m.f.
- d) Both an e.m.f. and a current
Answer: No current
Question: A magnet is brought near a coil in two ways (i) rapidly (ii) slowly. The induced charge will be
- a) Equal in both the cases
- b) More in case (i)
- c) More in case (ii)
- d) More or less according to the radius of the coil
Answer: Equal in both the cases
Question: A circular loop of flexible conducting material is kept in a magnetic field directed perpendicularly into its plane. By holding the loop at diametrically opposite points its is suddenly stretched outwards, then
- a) Clockwise current is induced
- b) No current is induced in the loop
- c) Anti-clockwise current is induced
- d) Only e.m.f. is induced
Answer: Clockwise current is induced
Question: An aeroplane is flying horizontally with a velocity of 360 km/h. The distance between the tips of the wings of aeroplane is 25 m. The vertical component of earth's magnetic field is 4 × 10–4 Wb/m2. The induced e.m.f. is
- a) 1 V
- b) 100 V
- c) 1 kV
- d) Zero
Answer: 1 V
Question:
- a)
- b)
- c)
- d)
Answer:
Question: A coil having 500 square loops each of side 10 cm is placed with its plane perpendicular to a magnetic field which increases at a rate of 1.0 tesla/s. The induced e.m.f. (in volts) is
- a) 5.0
- b) 1.0
- c) 0.1
- d) 0.5
Answer: 5.0
Question: The physical quantity, which is conserved on the basis of Lenz's Law is
- a) Energy
- b) Mass
- c) Momentum
- d) Charge
Answer: Energy
Question:
- a)
- b)
- c)
- d)
Answer:
Question: A metallic ring with a cut is held horizontally and a magnet is allowed to fall vertically through the ring, then the acceleration of this magnet is
- a) Equal to g
- b) Less than g
- c) More than g
- d) Sometimes less and sometimes more than g
Answer: Equal to g
Question:
- a) d
- b) c
- c) b
- d) a
Answer: d
Question: A loop of irregular shape made of flexible conducting wire carrying clockwise current is placed in uniform inward magnetic field, such that its plane is perpendicular to the field. Then the loop
- a) All of these
- b) Develops induced current for a short time
- c) Experiences force
- d) Changes to circular loop
Answer: All of these
Question:
- a) Anti-clockwise
- b) No current
- c) None of these
- d) Clockwise
Answer: Anti-clockwise
Question:
- a) Perpendicular outside the paper
- b) Parallel to motion of wire
- c) Along XY
- d) Perpendicular inside the paper
Answer: Perpendicular outside the paper
Question:
- a)
- b)
- c)
- d)
Answer:
Question:
- a)
- b)
- c)
- d)
Answer:
Question:
- a) 3.5 A
- b) 4.5 A
- c) 2.5 A
- d) 1.5 A
Answer: 3.5 A
More Questions....................................................
Question: Eddy currents are induced when
- a) A metal block is kept in a changing magnetic field
- b) A metal block is kept in a uniform magnetic field
- c) A coil is kept in a uniform magnetic field
- d) Current is passed in a coil
Answer: A metal block is kept in a changing magnetic field
Question: A motor starter
- a) All of these
- b) Offsets the back emf variations
- c) Is a variable resistor
- d) Helps start a DC motor
Answer: All of these
Question:
- a) 3 A
- b) 6 A
- c) 2 A
- d) 1 A
Answer: 3 A
Question: Which of the following is possible application of an RC circuit?
- a) All of these
- b) Heart pacemakers
- c) Flashing red lights on roadway construction sites
- d) Windshield wipers
Answer: All of these
Question: The current passing through a choke coil of self inductance 5 H is decreasing at the rate of 2 A/s. The e.m.f. developed across the coil is
- a) 10 V
- b) – 10 V
- c) – 2.5 V
- d) 2.5 V
Answer: 10 V
Question: When the number of turns in a solenoid are doubled without any change in the length of the solenoid, its self inductance becomes
- a) Four times
- b) Eight times
- c) Double
- d) Half
Answer: Four times
Question: A coil of resistance 20 ohms and inductance 5 H has been connected to a 100 volt battery. The energy stored in the coil is
- a) 62.5 J
- b) 31.25 J
- c) 125 J
- d) 250 J
Answer: 62.5 J
Question: The magnetic energy stored in a long solenoid of area of cross-section A in a small region of length L is
- a)
- b)
- c)
- d)
Answer:
Question: An inductor is connected to a direct voltage source through a switch. Now
- a) Larger emf is induced when switch is opened
- b) Very large emf is induced in inductor when switch is closed
- c) Large emf is induced whether switch is closed or opened
- d) No emf is induced whether switch is closed or opened
Answer: Larger emf is induced when switch is opened
Question: A long solenoid has self inductance L. If its length is doubled keeping total number of turns constant then its new self inductance will be
- a)
- b)
- c) L
- d) 2L
Answer:
Question: If L and R denote inductance and resistance respectively, then the dimension of L/R is
- a)
- b)
- c)
- d)
Answer:
Question: A solenoid has 2000 turns wound over a length of 0.3 m. The area of its cross section is 1.2 × 10–3 m2. Around its central section a coil of 300 turns is wound. If an initial current of 2 A is reversed in 0.25 s, the e.m.f. induced in the coil is equal to
- a) 4.8 × 10–2 V
- b) 6 × 10–4 V
- c) 2.4 × 10–2 V
- d) 48 kV
Answer: 4.8 × 10–2 V
Question: With the decrease of current in the primary coil from 2 A to zero in 0.01s, the e.m.f. generated in the secondary coil is 1000 V. The mutual inductance of the two coil is
- a) 5.00 H
- b) 10.00 H
- c) 2.50 H
- d) 1.25 H
Answer: 5.00 H
Question: Two coaxial coils are very close to each other and their mutual inductance is 5 mH. If a current 50 sin 500t is passed in one of the coils then the peak value of induced e.m.f. in the secondary coil will be
- a) 125 V
- b) 150 V
- c) 500 V
- d) 5000 V
Answer: 125 V
Question: The coefficient of self induction of two inductor coils are 20 mH and 40 mH respectively. If the coils are connected in series so as to support each other and the resultant inductance is 80 mH then the value of mutual inductance between the coils will be
- a) 10 mH
- b) 5 mH
- c) 20 mH
- d) 40 mH
Answer: 10 mH
Question:
- a) v < v0
- b) v > v0
- c) v = v0
- d) None of these
Answer: v < v0
Question:
- a) Switch is opened
- b) Switch is closed or opened
- c) Switch is closed
- d) None of these
Answer: Switch is opened
Question:
- a) Clockwise
- b) Anticlockwise
- c) Anticlockwise and then clockwise
- d) Clockwise and then anticlockwise
Answer: Clockwise
Question:
- a) 10 A
- b) 240 A
- c) 1 A
- d) 2 A
Answer: 10 A
Question: A copper disc of radius 0.1 m is rotated about its centre with 10 rev/s in a uniform magnetic field of 0.1T with its plane perpendicular to field. The emf induced across the radius of disc is
- a)
- b)
- c)
- d) Zero
Answer:
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MCQs for Electromagnetic Induction Physics Full Syllabus
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