Magnetism & EMI

Q. What is the effect of increasing the capacitance in a capacitor in an AC circuit on the current?
  • A. Increases current
  • B. Decreases current
  • C. No effect
  • D. Current becomes zero
Q. What is the effect of increasing the capacitance in an AC circuit on the capacitive reactance?
  • A. Increases
  • B. Decreases
  • C. Remains the same
  • D. Becomes zero
Q. What is the effect of increasing the capacitance in an AC circuit on the phase angle between voltage and current?
  • A. Increases phase angle
  • B. Decreases phase angle
  • C. No effect
  • D. Phase angle becomes 90 degrees
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 current in a solenoid on the magnetic field strength?
  • A. Decreases the magnetic field strength
  • B. Increases the magnetic field strength
  • C. Has no effect
  • D. Reverses the magnetic field direction
Q. What is the effect of increasing the current in a solenoid on the magnetic field strength inside it?
  • A. Increases the magnetic field strength
  • B. Decreases the magnetic field strength
  • C. No effect on the magnetic field strength
  • D. Reverses the direction of the magnetic field
Q. What is the effect of increasing the current in a wire on the magnetic field around it?
  • A. Increases the magnetic field
  • B. Decreases the magnetic field
  • C. No effect on the magnetic field
  • D. Reverses the direction of the magnetic field
Q. What is the effect of increasing the distance from a current-carrying wire on the magnetic field strength?
  • A. It increases
  • B. It decreases
  • C. It remains constant
  • D. It becomes zero
Q. What is the effect of increasing the distance from a long straight conductor on the magnetic field strength?
  • A. Increases
  • B. Decreases
  • C. Remains constant
  • D. Becomes zero
Q. What is the effect of increasing the distance from a long straight current-carrying wire on the magnetic field strength?
  • A. It increases
  • B. It decreases
  • C. It remains constant
  • D. It becomes zero
Q. What is the effect of increasing the distance from a long straight wire on the magnetic field strength?
  • A. It increases
  • B. It decreases
  • C. It remains constant
  • D. It becomes zero
Q. What is the effect of increasing the frequency of an AC source on the inductive reactance of a circuit?
  • A. It decreases
  • B. It remains the same
  • C. It increases
  • D. It becomes zero
Q. What is the effect of increasing the frequency of the alternating current in an inductor?
  • A. Inductive reactance decreases
  • B. Inductive reactance increases
  • C. Inductive reactance remains constant
  • D. Inductive reactance becomes zero
Q. What is the effect of increasing the frequency on the capacitive reactance?
  • A. Increases
  • B. Decreases
  • C. Remains the same
  • D. Becomes zero
Q. What is the effect of increasing the frequency on the impedance of a series RLC circuit?
  • A. Increases
  • B. Decreases
  • C. Remains constant
  • D. Depends on R, L, and C
Q. What is the effect of increasing the frequency on the impedance of an inductor?
  • A. Increases
  • B. Decreases
  • C. Remains the same
  • D. Becomes zero
Q. What is the effect of increasing the number of turns in a coil on the induced EMF when the magnetic field changes?
  • A. Induced EMF decreases
  • B. Induced EMF remains the same
  • C. Induced EMF increases
  • D. Induced EMF becomes zero
Q. What is the effect of increasing the number of turns in a coil on the induced EMF?
  • A. It increases the induced EMF
  • B. It decreases the induced EMF
  • C. It has no effect
  • D. It makes the EMF negative
Q. What is the effect of increasing the number of turns in a coil on the induced EMF when the magnetic flux changes?
  • A. It increases the induced EMF
  • B. It decreases the induced EMF
  • C. It has no effect
  • D. It makes the induced EMF zero
Q. What is the effect of increasing the number of turns in a coil on the magnetic field produced?
  • A. Increases
  • B. Decreases
  • C. No effect
  • D. Reverses
Q. What is the effect of increasing the number of turns in a coil on the magnetic field produced by it?
  • A. It decreases the magnetic field
  • B. It has no effect
  • C. It increases the magnetic field
  • D. It reverses the magnetic field direction
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 radius of a circular loop carrying current on the magnetic field at its center?
  • A. It increases the magnetic field
  • B. It decreases the magnetic field
  • C. It has no effect
  • D. It reverses the direction of the magnetic field
Q. What is the effect of increasing the radius of a circular loop on the magnetic field at its center?
  • A. Increases
  • B. Decreases
  • C. Remains the same
  • D. Becomes zero
Q. What is the effect of increasing the resistance in a series AC circuit?
  • A. Increases current
  • B. Decreases current
  • C. No effect
  • D. Increases voltage
Q. What is the effect of increasing the resistance in a series RLC circuit on the Q factor?
  • A. Increases Q factor
  • B. Decreases Q factor
  • C. No effect
  • D. Doubles Q factor
Q. What is the effect of increasing the resistance in an AC circuit on the overall current?
  • A. Increases current
  • B. Decreases current
  • C. No effect
  • D. Doubles current
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 increasing the speed of a conductor moving through a magnetic field on the induced EMF?
  • A. Increases the induced EMF
  • B. Decreases the induced EMF
  • C. No effect on the induced EMF
  • D. Induced EMF becomes zero
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