Magnetic Field

Q. In which of the following scenarios will a charged particle experience the maximum magnetic force?
  • A. When moving parallel to the magnetic field
  • B. When moving perpendicular to the magnetic field
  • C. When at rest
  • D. When moving at an angle of 45 degrees
Q. In which of the following scenarios will a charged particle not experience any magnetic force?
  • A. When moving parallel to the magnetic field
  • B. When moving perpendicular to the magnetic field
  • C. When at rest
  • D. Both a and c
Q. In which of the following scenarios will a magnetic field be produced?
  • A. A stationary charge
  • B. A moving charge
  • C. A neutral atom
  • D. A charged particle at rest
Q. Two parallel wires carry currents in the same direction. What is the nature of the force between them?
  • A. Attractive
  • B. Repulsive
  • C. No force
  • D. Depends on the current
Q. Two parallel wires carry currents I₁ and I₂ in the same direction. What is the nature of the force between them?
  • A. Attractive
  • B. Repulsive
  • C. Zero
  • D. Depends on distance
Q. Two parallel wires carrying currents I₁ and I₂ in the same direction are separated by a distance d. What is the force per unit length between them?
  • A. (μ₀I₁I₂)/(2πd)
  • B. (μ₀I₁I₂)/(4πd)
  • C. (μ₀I₁I₂)/(8πd)
  • D. (μ₀I₁I₂)/(πd)
Q. What happens to the magnetic field inside a long solenoid when the current through it is increased?
  • A. Magnetic field decreases
  • B. Magnetic field remains constant
  • C. Magnetic field increases
  • D. Magnetic field becomes zero
Q. What happens to the magnetic field strength if the distance from a long straight conductor is doubled?
  • A. It doubles
  • B. It halves
  • C. It quadruples
  • D. It becomes zero
Q. What happens to the magnetic field strength if the distance from a long straight wire is tripled?
  • A. Increases by 3 times
  • B. Decreases by 3 times
  • C. Decreases by 9 times
  • D. Remains the same
Q. What happens to the magnetic field strength inside a long solenoid when the current through it is increased?
  • A. It decreases
  • B. It remains constant
  • C. It increases
  • D. It becomes zero
Q. What happens to the magnetic field strength when the distance from a long straight conductor is doubled?
  • A. It doubles
  • B. It halves
  • C. It remains the same
  • D. It quadruples
Q. What is the direction of the magnetic field around a straight current-carrying conductor?
  • A. From north to south
  • B. From south to north
  • C. Clockwise
  • D. Counterclockwise
Q. What is the direction of the magnetic field due to a current-carrying loop at its center?
  • A. Out of the plane
  • B. Into the plane
  • C. Clockwise
  • D. Counterclockwise
Q. What is the direction of the magnetic field produced by a current-carrying loop using the right-hand rule?
  • A. Clockwise
  • B. Counterclockwise
  • C. Out of the plane
  • D. Into the plane
Q. What is the direction of the magnetic field produced by a current-carrying wire using the right-hand rule?
  • A. Towards the wire
  • B. Away from the wire
  • C. Clockwise
  • D. Counterclockwise
Q. What is the effect of a magnetic field on a current-carrying conductor placed in it?
  • A. It experiences no force
  • B. It experiences a force
  • C. It heats up
  • D. It becomes magnetized
Q. What is the effect of increasing the current in a coil on the magnetic field strength?
  • A. Increases
  • B. Decreases
  • C. No effect
  • D. Depends on the coil material
Q. What is the effect of increasing the current in a solenoid on the magnetic field inside it?
  • A. Increases
  • B. Decreases
  • C. Remains the same
  • D. Becomes zero
Q. What is the effect of increasing the number of turns in a solenoid on the magnetic field inside it?
  • A. Magnetic field decreases
  • B. Magnetic field remains constant
  • C. Magnetic field increases
  • D. Magnetic field becomes zero
Q. What is the effect of increasing the speed of a charged particle moving in a magnetic field?
  • A. Increases the magnetic force
  • B. Decreases the magnetic force
  • C. No effect on the magnetic force
  • D. Reverses the direction of the force
Q. What is the effect of temperature on the magnetic susceptibility of a paramagnetic material?
  • A. Increases with temperature
  • B. Decreases with temperature
  • C. Remains constant
  • D. Becomes zero
Q. What is the force experienced by a charge q moving with velocity v in a magnetic field B?
  • A. qvB
  • B. qvB sin(θ)
  • C. qvB cos(θ)
  • D. qvB tan(θ)
Q. What is the force experienced by a charge q moving with velocity v in a magnetic field B at an angle θ?
  • A. qvB
  • B. qvB sin(θ)
  • C. qvB cos(θ)
  • D. qvB tan(θ)
Q. What is the force experienced by a current-carrying conductor placed in a magnetic field?
  • A. Electromotive force
  • B. Lorentz force
  • C. Centripetal force
  • D. Gravitational force
Q. What is the force on a charge q moving with velocity v in a magnetic field B?
  • A. qvB
  • B. qvBsinθ
  • C. qvBcosθ
  • D. qB
Q. What is the formula for the magnetic force experienced by a charged particle moving in a magnetic field?
  • A. F = qE
  • B. F = qvBsin(θ)
  • C. F = mv^2/r
  • D. F = BIL
Q. What is the magnetic field at a point on the axis of a circular loop of radius R carrying current I?
  • A. μ₀I/(2R)
  • B. μ₀I/(4R)
  • C. μ₀I/(2R²)
  • D. μ₀I/(2√2R)
Q. What is the magnetic field at a point on the axis of a circular loop of radius R carrying a current I at a distance x from the center?
  • A. (μ₀I)/(2R) * (R²/(R²+x²)^(3/2))
  • B. (μ₀I)/(4R) * (R²/(R²+x²)^(3/2))
  • C. (μ₀I)/(2R) * (1/(R²+x²)^(3/2))
  • D. (μ₀I)/(4R) * (1/(R²+x²)^(3/2))
Q. What is the magnetic field at the center of a circular loop of radius R carrying current I?
  • A. μ₀I/2R
  • B. μ₀I/R
  • C. μ₀I/4R
  • D. μ₀I/πR
Q. What is the magnetic field at the center of a circular loop of radius R carrying a current I?
  • A. μ₀I/(2R)
  • B. μ₀I/(4R)
  • C. μ₀I/(R)
  • D. μ₀I/(8R)
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