Representation of an Alternating Quantity by a Phasor MCQ

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• The length of the phasor represents?
  ক

  Magnitude of the quantity

  খ

  Direction of the quantity

  গ

  Neither magnitude nor direction

  ঘ

  Either magnitude or direction
• The time axis of an AC phasor represents?
  ক

  Time

  খ

  Phase angle

  গ

  Voltage

  ঘ

  Current
• A phasor has frozen at 30 degrees, find the value of the phase angle.
  ক

  30 degrees

  খ

  60 degrees

  গ

  120 degrees

  ঘ

  180 degrees
• When one sine wave passes through the zero following the other, it is _________
  ক

  Leading

  খ

  Lagging

  গ

  Neither leading nor lagging

  ঘ

  Either leading or lagging
• Find the value of ω if the frequency is 5Hz?
  ক

  3.14 rad/s

  খ

  31.4 rad/s

  গ

  34 rad/s

  ঘ

  341 rad/s
• What is the correct expression of ω?
  ক

  ω=2π

  খ

  ω=2πf

  গ

  ω=πf

  ঘ

  ω=2f2
• Find the total current in the circuit if two currents of 4+5j flow in the circuit.
  ক

  4+5j A

  খ

  4A

  গ

  5A

  ঘ

  8+10j A
• If a voltage of 2+5j and another voltage of 3+ 6j flows through two different resistors, connected in series, in a circuit, find the total voltage in the circuit.
  ক

  2+5j V

  খ

  3+6j V

  গ

  5+11j V

  ঘ

  5+10j V
• For multiplication and division of phasors, we use ____________ form.
  ক

  Rectangular

  খ

  Polar

  গ

  Either rectangular or polar

  ঘ

  Neither rectangular nor polar
• For addition and subtraction of phasors, we use the _________ form.
  ক

  Rectangular

  খ

  Polar

  গ

  Either rectangular or polar

  ঘ

  Neither rectangular nor polar