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11

Two bodies each carrying a charge of 2.00 x 10-10C are 5cm apart. Calculate the magnitude of the force between the charges.[\(\frac{1}{4\pi \mathit{E}_o} = 9.00 \times 10^9 Nm^2C{-2}\)]

  • A. 1.44 x 10-7N
  • B. 7.20 x 10-9N
  • C. 7.20 x 10-11N
  • D. 1.44 x 1011N
View Answer & Discuss (4) WAEC 2008
12

The electric potential at a distance d from a point charge q in air of permittivity eo is expressed as?

  • A. q2 ÷ 4πeod
  • B. q2 ÷ 4πeo
  • C. q ÷ 4πeod2
  • D. q ÷ 4πeod
  • E. q ÷ 4πeo2d
View Answer & Discuss (5) NECO 2009
13

The diagram above illustrates two charged bodies, X and Y separated by a distance r. Each body has charge q and mass m. Which of the following statements about the electrostatic force \(F_{e}\) and gravitational force \(F_{g}\) acting between the bodies is correct?

  • A. \(F_{e}\) is attraction while \(F_{g}\) is repulsion
  • B. Both \(F_{e}\) and \(F_{g}\) are that of repulsion
  • C. Both \(F_{e}\) and \(F_{g}\) is that of attraction
  • D. \(F_{e}\) is repulsion while \(F_{g}\) is attraction
View Answer & Discuss (9) WAEC 2017
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14

Electric motor primarily converts?    

  • A. electrical energy to chemical energy.   
  • B.   kinetic energy to potential energy   
  • C. electrical energy to mechanical energy   
  • D. electrical energy to heat energy.
View Answer & Discuss WAEC 2021
15

Which of the following statements about electric potential energy is not correct?

  • A. The electric potential energy of a positively charged particle increases when it moves to a point of higher potential
  • B. The electric potential energy of a negatively charged particle increases when it moves to a point of lower potential
  • C. The electric potential energy of a positively charged particle decreases when it moves to a point of higher potential
  • D. The work done in taking a charged particle around a closed path in an electric field is zero.
View Answer & Discuss (3) WAEC 2022
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