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