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Moving Charges and Magnetism Physics - Moving Charges and Magnetism

Bihar Board (BSEB) - STD 12 Science - Physics (BSEB - English Medium). 147 questions in this chapter.

Question types

Moving Charges and Magnetism question types

147 questions across 7 question groups — pick any mix to generate a Physics paper with step-by-step answer keys.

147
Questions
7
Question groups
5
Question types
Sample Questions

Moving Charges and Magnetism questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 1M.C.Q [1M]1 Mark
When a charged particles moves in a uniform magnetic field in a direction perpendicular to the field, then the path of the particle will be:
  • ✓
    Perabolic
  • B
    Circular
  • C
    Straight line
  • D
    Helical

Answer: A.

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Q 2M.C.Q [1M]1 Mark
Moving charge produces:
  • A
    Only electric field
  • B
    Only magnetic field
  • ✓
    Both electric and magnetic field
  • D
    Electromagnetic waves along with electric and magnetic field

Answer: C.

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Q 3M.C.Q [1M]1 Mark
The toroid of radius 10 cm has 100 turns. If a current of 0.1 ampere is flowing in it, then the value of the magnetic field on the axis of the toroid will be:
  • ✓
    $2 \times 10^{-4} T$
  • B
    $4 \times 10^{-4} T$
  • C
    $6 \times 10^{-4} T$
  • D
    $8 \times 10^{-4} T$

Answer: A.

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Q 4M.C.Q [1M]1 Mark
Magnitude of intensity of magnetic field at the center of any circular current carrying conductor is:
  • A
    minimum
  • B
    only proportional to current
  • ✓
    maximum
  • D
    proportional to radius

Answer: C.

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Q 5M.C.Q [1M]1 Mark
Magnetic field in a current carrying solenoid is B. If length of the solenoid and current flowing through the solenoid is doubled, keeping the number of turns same, the magnitude of magnetic field in the solenoid will be:
  • A
    B
  • ✓
    2B
  • C
    $\frac{B}{4}$
  • D
    4B

Answer: B.

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Q 101 Marks Question1 Mark
A ring is uniformly charged. The total charge on ring is q and its radius is r. If it rotates on its axis by n rounds per second then what is the magnitude of produced magnetic field at the center?
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Q 14Short Answer Type Questions [2M]2 Marks
A coil of N turns is wound tightly in the form of a spiral whose internal and external radii $r_1$ are $r_2$ and respectively. Current $I$ is flowing through the coil, then calculate the magnetic field at the center.
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Q 15Short Answer Type Questions [2M]2 Marks
Two identical coils, radius of each is 8 cm and number of turns is 100 are coaxial and their centers are 12 cm apart. If current of 1 A flows in each coil in the same direction, then calculate the magnetic field at the midpoint on the axial line.
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Q 163 Marks Question3 Marks
"Write ampere's circuital law. In a long straight wire of cross-sectional cut (radius a), a direct current is flowing in the wire. Current is uniformly distributed in the wire. Calculate the magnetic field in inner surface of the wire ( $r
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Q 173 Marks Question3 Marks
A square coil of side 10 cm consists of 20 turns and carries a current of 12 A. The coil is suspended vertically and normal to the plane of the coil makes an angle of $30^{\circ}$with the direction of a uniform horizontal magnetic field of magnitude 0.80 T. What is the magnitude of the torque experienced by the coil?
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Q 183 Marks Question3 Marks
A closely wound solenoid 80 cm long has 5 layers of windings of 400 turns each. The diameter of the solenoid is 1.8 cm. If the current carried is 8.0 A, estimate the magnitude of B inside the solenoid near its centre.
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Q 193 Marks Question3 Marks
Two long and parallel straight wires A and B carrying currents of 8.0 and 5.0 A in the same direction are separated by a distance of 4.0 cm. Estimate the force on a 10 cm section of wire A.
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Q 203 Marks Question3 Marks
A 3.0 cm wire carrying of 10 A is placed inside a solenoid perpendicular to its axis. The magnetic field inside the solenoid is given to be 0.27 T. What is the magnetic force on the wire?
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Q 224 Marks Questions4 Marks
A horizontal overhead power line carries a current of 90 A in east to west direction. What is the magnitude and direction of magnetic field due to the current 1.5 m in below the line?
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Q 234 Marks Questions4 Marks
(a) A circular coil of 30 turns and radius 8.0 cm carrying a current of 6.0 A is suspended vertically in a uniform horizontal magnetic field of magnitude 1.0 T. The field lines make an angle of $60^{\circ}$ with the normal of the coil. Calculate the magnitude of the counter torque that must be applied to prevent the coil from turning.
(b) Would your answer change, if the circular coil in (a) were replaced by a planar coil of some irregular shape that encloses the same area? (All other particulars are also unaltered.)
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Q 244 Marks Questions4 Marks
In a chamber, a uniform magnetic field of 6.5 G (1 G = 10-4T ) is maintained. An electron is shot into the field with a speed of 4.8 X 106 m s-1normal to the field. Explain why the path of the electron is a circle. Determine the radius of the circular orbit.
$\left( e =1.6 \times 10^{-19} C , m_e=9.1 \times 10^{-31} kg\right)$
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Q 25Long Answer Type Questions [5M]5 Marks
Obtain expression for force on unit length of two straight parallel current carrying conductors. Under what conditions is this force attractive or repulsive? Define the standard unit of electric current.
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Q 26Long Answer Type Questions [5M]5 Marks
Examine the maximum value of magnetic field at a point on the axis of circular current carrying coil after obtaining an expression for it.###Calculate produced magnetic field on the axis of any current carrying circular coil by making diagram. Examine the graph between distance and change in magnetic field after drawing the graph.
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Q 27Long Answer Type Questions [5M]5 Marks
Two moving coil meters, M1 and M2 have the following particulars:$\begin{array}{l} R _1=10 \Omega, N_1=30 \\
A_1=3.6 \times 10^{-3} m^2, B_1=0.25 T\end{array}$
$\begin{array}{l} R _2=14 \Omega, N_2=42 \\
A_2=1.8 \times 10^{-3} m^2, B_2=0.50 T\end{array}$
(The spring constants are identical for the two meters).
Determine the ratio of (a) current sensitivity and (b) voltage sensitivity of M2 and M1.
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Q 28Long Answer Type Questions [5M]5 Marks
State Biot-Savart statement. Obtain an expression for produced magnetic field due to a straight and limited length of current carrying conductor wire. Write its similarities and differences with coulomb's law of electrostatics.
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