Magnetism and Electrom Questions and Answers

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Showing 10 of 33 questions
Q21
The Hall voltage is the voltage created by a conductor moving through a magnetic field.
  • A TRUE
  • B FALSE
Answer: Option B
Q22
The ability of a material to maintain a magnetized state (without the presence of a magnetizing force) is called hysteresis.
  • A TRUE
  • B FALSE
Answer: Option B
Q23
Ferromagnetic materials have pre-existing magnetic fields.
  • A TRUE
  • B FALSE
Answer: Option B
Q24
The unit of magnetic flux is the weber.
  • A TRUE
  • B FALSE
Answer: Option A
Q25
A voltage is induced across a conductor if it remains absolutely stationary within a magnetic field.
  • A TRUE
  • B FALSE
Answer: Option B
Q26
A magnetic material such as iron can change the course of magnetic lines of force.
  • A TRUE
  • B FALSE
Answer: Option A
Q27
The induced emf of a conductor cutting flux lines is directly proportional to the rate of cutting.
  • A TRUE
  • B FALSE
Answer: Option A
Q28
The magnetic field, current through the Hall element, and Hall voltage are all at right angles to each other.
  • A TRUE
  • B FALSE
Answer: Option A
Q29
The operation of an electrical generator relies on electromagnetic induction.
  • A TRUE
  • B FALSE
Answer: Option A
Q30
What device is similar to an RTD but has a negative temperature coefficient?
  • A Strain gauge
  • B Thermistor
  • C Negative-type RTD
  • D Thermocouple
Answer: Option B

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