Electricity and Magnetism MCQs

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A negative ion results when an atom gains an additional

  • A. Electron
  • B. Proton
  • C. Neutron
  • D. Atom
  • Correct Answer: Option A

Which element has four valence electrons?

  • A. Conductor
  • B. Insulator
  • C. Semiconductor
  • D. Semi- insulator
  • Correct Answer: Option C

good conductor has how many valence electrons?

  • A. 1
  • B. 4
  • C. 2
  • D. 8
  • Correct Answer: Option A

Which of the following has the least number of valence electrons?

  • A. Conductor
  • B. Semiconductor
  • C. Insulator
  • D. Semi- insulator
  • Correct Answer: Option A

Electrons at the outer shell are called

  • A. Outer shell electrons
  • B. Inner shell electrons
  • C. Semiconductor electrons
  • D. Valence electrons
  • Correct Answer: Option D

The unit of electrical energy is

  • A. Joule
  • B. Watt- second
  • C. Kilowatt- hour
  • D. All of these
  • Correct Answer: Option D

An electron- volt (eV) is a unit of

  • A. Energy
  • B. Potential difference
  • C. Charge
  • D. Momentum
  • Correct Answer: Option A

One electron volt (1 eV) is equivalent to ____ joules

  • A. 1.3 x 10^-19
  • B. 1.4 x 10^-19
  • C. 1.5 x 10^-19
  • D. 1.6 x 10^-19
  • Correct Answer: Option D

One oersted (Oe) is equivalent to ______ Gb/cm.

  • A. 1
  • B. 10
  • C. 100
  • D. 1000
  • Correct Answer: Option A

How much is the flux in Weber are there in a magnetic flux of 2000 lines

  • A. 2 x 10^-5
  • B. 2 x 10^-3
  • C. 2 x 10^5
  • D. 2 x 10^3
  • Correct Answer: Option A