Magnetism & EMI

Q. What is the effect of increasing the speed of a magnet moving through a coil?
  • A. Induced current decreases
  • B. Induced current increases
  • C. No change in induced current
  • D. Induced current becomes zero
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 effect of temperature on the resistance of a conductor?
  • A. Resistance increases with temperature
  • B. Resistance decreases with temperature
  • C. Resistance remains constant
  • D. Resistance is independent of temperature
Q. What is the expression for the magnetic field at the center of a circular loop of radius R carrying current I?
  • A. μ₀I/(2R)
  • B. μ₀I/(4R)
  • C. μ₀I/(2πR)
  • D. μ₀I/(4πR)
Q. What is the expression for the magnetic field at the center of a circular loop of radius R carrying a current I?
  • A. B = μ₀I/(2R)
  • B. B = μ₀I/(4R)
  • C. B = μ₀I/(πR)
  • D. B = μ₀I/(2πR)
Q. What is the expression for the magnetic field B at a distance r from a long straight wire carrying current I according to the Biot-Savart Law?
  • A. B = (μ₀I)/(2πr)
  • B. B = (μ₀I)/(4πr²)
  • C. B = (I)/(2πr)
  • D. B = (μ₀I²)/(2πr)
Q. What is the expression for the magnetic field B at a distance r from a long straight conductor carrying current I?
  • A. B = (μ₀I)/(2πr)
  • B. B = (μ₀I)/(4πr²)
  • C. B = (I)/(2πr)
  • D. B = (μ₀I²)/(2πr)
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 calculating the magnetic force on a charged particle moving in a magnetic field?
  • A. F = qE
  • B. F = qvBsinθ
  • C. F = mv^2/r
  • D. F = qvE
Q. What is the formula for calculating the total power in a series RLC circuit?
  • A. P = VI
  • B. P = I^2R
  • C. P = V^2/R
  • D. P = VI cos(φ)
Q. What is the formula for calculating the total power in an AC circuit with a power factor?
  • A. P = VI
  • B. P = VI cos(φ)
  • C. P = VI sin(φ)
  • D. P = V^2/R
Q. What is the formula for the force experienced by a charged particle moving in a magnetic field?
  • A. F = qvB sin(θ)
  • B. F = qvB cos(θ)
  • C. F = qB
  • D. F = qE
Q. What is the formula for the magnetic field (B) inside a solenoid?
  • A. B = μ₀(nI)
  • B. B = μ₀I
  • C. B = μ₀(nI)/L
  • D. B = μ₀I²
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 formula for the magnetic force on a charge q moving with velocity v in a magnetic field B?
  • A. F = qvB
  • B. F = qvBsinθ
  • C. F = qB
  • D. F = qvBcosθ
Q. What is the formula for the magnetic force on a charged particle moving in a magnetic field?
  • A. F = qE
  • B. F = qvBsinθ
  • C. F = mv^2/r
  • D. F = qvE
Q. What is the formula for the total power in a series RLC circuit?
  • A. P = VI
  • B. P = I^2R
  • C. P = V^2/R
  • D. P = VI cos(φ)
Q. What is the impedance of a series circuit containing a resistor (R) and an inductor (L)?
  • A. R
  • B. √(R^2 + (ωL)^2)
  • C. R + ωL
  • D. R - ωL
Q. What is the impedance of a series circuit containing a resistor and an inductor?
  • A. R
  • B. √(R^2 + (ωL)^2)
  • C. R + jωL
  • D. R - jωL
Q. What is the impedance of a series RLC circuit at resonance?
  • A. R
  • B. L
  • C. C
  • D. 0
Q. What is the induced EMF in a loop of wire if the magnetic field through the loop changes at a rate of dB/dt?
  • A. -A(dB/dt)
  • B. A(dB/dt)
  • C. -L(dB/dt)
  • D. L(dB/dt)
Q. What is the induced EMF in a loop of wire if the magnetic flux through it changes at a rate of dΦ/dt?
  • A. -dΦ/dt
  • B. dΦ/dt
  • C. Φ
  • D. 0
Q. What is the induced EMF in a loop of wire when the magnetic field changes at a rate of 5 T/s?
  • A. 0 V
  • B. 5 V
  • C. 10 V
  • D. 15 V
Q. What is the induced EMF in a loop of wire when the magnetic field through it changes at a rate of 5 T/s?
  • A. 0 V
  • B. 5 V
  • C. 10 V
  • D. 15 V
Q. What is the induced EMF in a loop of wire when the magnetic field through it changes at a rate of dB/dt?
  • A. -dB/dt
  • B. dB/dt
  • C. μ₀dB/dt
  • D. 0
Q. What is the integral form of Ampere's Law?
  • A. ∮B·dl = μ₀I_enclosed
  • B. ∮E·dl = -dΦ/dt
  • C. ∮F·dl = m*a
  • D. ∮V·dl = Q/C
Q. What is the magnetic field at a distance r from an infinitely long straight wire carrying current I?
  • A. μ₀I/2πr
  • B. μ₀I/4πr
  • C. μ₀I/πr
  • D. 0
Showing 301 to 330 of 418 (14 Pages)
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