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Physics M.C.Q [1M]

Electromagnetic Induction · Bihar Board (BSEB) STD 12 Science (BSEB - English Medium). 13 questions.

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M.C.Q [1M]

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13 questions · timed · auto-graded

MCQ 11 Mark
The working principle of dynamo is based on :
  • A
    heating effect of current
  • ✓
    electromagnetic induction
  • C
    induced magnetism
  • D
    induced current
Answer
Correct option: B.
electromagnetic induction
B
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MCQ 21 Mark
S.I. unit of self-induction is :
  • A
    coulomb (C)
  • B
    volt (V)
  • C
    ohm ($\Omega$)
  • ✓
    henry (H)
Answer
Correct option: D.
henry (H)
D
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MCQ 31 Mark
On oscillating any metallic sphere in the magnetic field, its oscillatory motion is :
  • A
    Accelerated
  • ✓
    Damping
  • C
    Uniform
  • D
    None of these
Answer
Correct option: B.
Damping
B
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MCQ 41 Mark
What is produced by induction coil ?
  • A
    High current
  • ✓
    High voltage
  • C
    Low current
  • D
    Low voltage
Answer
Correct option: B.
High voltage
B
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MCQ 51 Mark
Dimensions of $L/R$ will be (where L is inductance and R resistance) :
  • A
    $M^{0}L^{0}T^{-1}$
  • B
    $M^{0}LT$
  • ✓
    $M^{0}L^{0}T$
  • D
    $MLT^{-2}$
Answer
Correct option: C.
$M^{0}L^{0}T$
C
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MCQ 61 Mark
In a closed circuit of resistance 10 $\Omega$, the linked flour varies with time according to relation $\phi=6t^{2}-t+1.$ At $t=0.25$ second, the current (in Ampere) flowing through the circuit is :
  • A
    0.4
  • ✓
    0.2
  • C
    2
  • D
    4
Answer
Correct option: B.
0.2
B
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MCQ 71 Mark
Lenz's law is associated with the principle of conservation of :
  • A
    charge
  • B
    mass
  • ✓
    energy
  • D
    linear momentum
Answer
Correct option: C.
energy
C
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MCQ 81 Mark
Induced emf opposes :
  • A
    Current
  • B
    Resistance
  • C
    Potential difference
  • ✓
    The reason due to which emf is induced
Answer
Correct option: D.
The reason due to which emf is induced
D
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MCQ 91 Mark
Henry is the unit of :
  • A
    Self inductance
  • B
    Mutual inductance
  • ✓
    Both self and mutual inductance
  • D
    None of these
Answer
Correct option: C.
Both self and mutual inductance
C
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MCQ 101 Mark
Direction of induced current is determined by :
  • ✓
    Lenz's law
  • B
    Flaming's left hand rule
  • C
    Biot-Savart's law
  • D
    Ampere's law
Answer
Correct option: A.
Lenz's law
A
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MCQ 111 Mark
Dimensions of mutual inductance is :
  • ✓
    $ML^{2}T^{-2}A^{-2}$
  • B
    $ML^{2}T^{2}A^{2}$
  • C
    $ML^{2}T^{-2}A^{2}$
  • D
    None of these
Answer
Correct option: A.
$ML^{2}T^{-2}A^{-2}$
A
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MCQ 121 Mark
The magnetic flux linked with a loop of wire placed in a magnetic field does not depend upon :
  • ✓
    Shape of the loop
  • B
    Area of the loop
  • C
    Intensity of magnetic field
  • D
    Orientation of the loop with respect to the field
Answer
Correct option: A.
Shape of the loop
A
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MCQ 131 Mark
The experiment required to demonstrate the electromagnetic induction was performed by :
  • ✓
    Faraday
  • B
    Ampere
  • C
    Gauss
  • D
    Micron
Answer
Correct option: A.
Faraday
A
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M.C.Q [1M] - Physics STD 12 Science Questions - Vidyadip