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Physics M.C.Q (1 Marks)

Magnetism · Maharashtra Board STD 11 (MSBSHSE - Semi English Medium). 20 questions.

Questions

M.C.Q (1 Marks)

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20 questions · auto-graded multiple-choice test.

MCQ 11 Mark
A magnetic needle kept nonparallel to the magnetic field in a nonuniform magnetic field experiences
  • A
    a force but not a torque
  • B
    a torque but not a force
  • ✓
    both a force and a torque
  • D
    neither force nor a torque
Answer
Correct option: C.
both a force and a torque
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MCQ 21 Mark
A place where the horizontal component of Earth’s magnetic field is zero lies at
  • A
    geographic equator
  • B
    geomagnetic equator
  • C
    one of the geographic poles
  • ✓
    one of the geomagnetic poles
Answer
Correct option: D.
one of the geomagnetic poles
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MCQ 31 Mark
A place where the vertical components of Earth’s magnetic field is zero has the angle of dip equal to
  • ✓
     0°
  • B
    45°
  • C
    60°
  • D
    90°
Answer
Correct option: A.
 0°
 0°
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MCQ 41 Mark
Inside a bar magnet, the magnetic field lines
  • A
    are not present
  • B
    are parallel to the cross sectional area of the magnet
  • C
    are in the direction from N pole to S pole
  • ✓
    are in the direction from S pole to N pole
Answer
Correct option: D.
are in the direction from S pole to N pole
are in the direction from S pole to N pole
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MCQ 51 Mark
The horizontal and vertical component of magnetic field of Earth are same at some place on the surface of Earth. The magnetic dip angle at this place will be
  • A
    30°
  • ✓
    45°
  • C
    0°
  • D
    90°
Answer
Correct option: B.
45°
45°
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MCQ 61 Mark
Magnetic meridian is the plane
  • A
    perpendicular to the magnetic axis of Earth
  • B
    perpendicular to geographic axis of Earth
  • ✓
    passing through the magnetic axis of Earth
  • D
    passing through the geographic axis
Answer
Correct option: C.
passing through the magnetic axis of Earth
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MCQ 71 Mark
Let r be the distance of a point on the axis of a bar magnet from its center. The magnetic field at r is always proportional to
  • A
    $\frac{1}{r^2}$
  • ✓
    $\frac{1}{r^3}$
  • C
    $\frac{1}{r}$
  • D
    Not necessarily $\frac{1}{r^3}$ at all points
Answer
Correct option: B.
$\frac{1}{r^3}$
$\frac{1}{r^3}$
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MCQ 81 Mark
The angle of dip at the magnetic poles of the earth is
  • ✓
    $90^{\circ}$
  • B
    $45^{\circ}$
  • C
    $30^{\circ}$
  • D
    $0^{\circ}$
Answer
Correct option: A.
$90^{\circ}$
$90^{\circ}$
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MCQ 91 Mark
The angle of dip at the equator is
  • A
    $90^{\circ}$
  • B
    $45^{\circ}$
  • C
    $30^{\circ}$
  • ✓
    $0^{\circ}$
Answer
Correct option: D.
$0^{\circ}$
$0^{\circ}$
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MCQ 101 Mark
The geometric length of a bar magnet having half magnetic length 5 cm is …………… cm.
  • ✓
    12
  • B
    10
  • C
    6
  • D
    $4.2$
Answer
Correct option: A.
12
12
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MCQ 111 Mark
A magnetic dipole has magnetic length 10 cm and pole strength 100 Am. Its magnetic dipole moment is ………………. Am².
  • A
    1000
  • B
    500
  • ✓
    10
  • D
    5
Answer
Correct option: C.
10
10
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MCQ 121 Mark
The magnetic induction B and the force F on a pole of strength m are related by
  • A
    B = m F
  • B
    F = nIABm
  • ✓
    F = m B
  • D
    $F =\frac{m}{B}$
Answer
Correct option: C.
F = m B
F = m B
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MCQ 131 Mark
A large magnet is broken into two pieces so that their lengths are in the ratio 2:1. The pole strengths of the two pieces will have the ratio
  • ✓
    $2 : 1$
  • B
    $1 :2$
  • C
    $4 : 1$
  • D
    $1 : 1$
Answer
Correct option: A.
$2 : 1$
$2 : 1$
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MCQ 141 Mark
The magnetic dipole moment has dimensions of
  • A
    current × length.
  • B
    charge × time × length.
  • ✓
    current × area.
  • D
    $\frac{\text { current }}{\text { area }}$
Answer
Correct option: C.
current × area.
current × area.
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MCQ 151 Mark
Two isolated point poles of strength $30 A-m$ and $60 A-m$ are placed at a distance of $0.3 m.$ The force of repulsion between them is
  • ✓
    $2 \times 10^{-3} N$
  • B
    $2 \times 10^{-4} N$
  • C
    $2 \times 10^5 N$
  • D
    $2 \times 10^{-5} N$
Answer
Correct option: A.
$2 \times 10^{-3} N$
$2 \times 10^{-3} N$
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MCQ 161 Mark
Magnetic lines of force originate from …………… pole and end at …………….. pole outside the magnet.
  • A
    north, north
  • ✓
    north, south
  • C
    south, north
  • D
    south, south
Answer
Correct option: B.
north, south
north, south
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MCQ 171 Mark
A compass needle is placed at the magnetic pole. It
  • A
    points N – S.
  • B
    points E – W.
  • C
    becomes vertical.
  • ✓
    may stay in any direction.
Answer
Correct option: D.
may stay in any direction.
may stay in any direction.
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MCQ 181 Mark
The points A and B are situated perpendicular to the axis of 2 cm long bar magnet at large distances x and 3 x from the centre on opposite sides. The ratio of magnetic fields at A and B will be approximately equal to
  • ✓
    $27 : 1$
  • B
    $1 : 27$
  • C
    $9 : 1$
  • D
    $ 1 : 9$
Answer
Correct option: A.
$27 : 1$
$27 : 1$
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MCQ 191 Mark
Magnetic field lines
  • ✓
    do not intersect each other.
  • B
    intersect each other at $45^{\circ}$.
  • C
    intersect each other at $90^{\circ}$.
  • D
    intersect each other at $60^{\circ}$.
Answer
Correct option: A.
do not intersect each other.
do not intersect each other.
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MCQ 201 Mark
The ratio of magnetic induction along the axis to magnetic induction along the equator of a magnet is
  • A
    $1 : 1$
  • B
    $1 : 2$
  • ✓
    $2 : 1$
  • D
    $4 : 1$
Answer
Correct option: C.
$2 : 1$
$2 : 1$
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