WAEC Physics questions: Electrostatics

9 questions with answers and explanations. Tap an option to check yourself.

1. Question 1· Electrostatics· WAEC

   The instrument used to detect and test small electric charges is the

   • Agalvanometer
   • Bgold-leaf electroscope
   • Cammeter
   • Dvoltmeter

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2. Question 2· Electrostatics· WAEC

   Two like charges

   • Ahave no effect
   • Battract each other
   • Cneutralise
   • Drepel each other

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3. Question 3· Electrostatics· WAEC

   An ebonite rod rubbed with fur becomes

   • Auncharged
   • Bpositively charged
   • Cmagnetised
   • Dnegatively charged

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4. Question 4· Electrostatics· WAEC

   A gold-leaf electroscope is used to

   • Adetect electric charge
   • Bmeasure current
   • Cstore charge
   • Dmeasure resistance

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5. Question 5· Electrostatics· WAEC

   The force between two point charges is 8 N. If the distance between them is doubled, the force becomes

   • A32 N
   • B4 N
   • C16 N
   • D2 N

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6. Question 6· Electrostatics· WAEC

   Two point charges of 2 × 10⁻⁶ C each are 0.3 m apart in air. Find the force between them. [k = 9 × 10⁹ N m²/C²]

   • A1.2 N
   • B0.12 N
   • C0.4 N
   • D0.04 N

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7. Question 7· Electrostatics· WAEC

   Lightning conductors protect buildings by

   • Astoring charge
   • Bdischarging charges safely to earth
   • Cattracting rain
   • Dproducing current

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8. Question 8· Electrostatics· WAEC

   On a charged conductor, the charge is most concentrated at

   • Asharp points
   • Bflat surfaces
   • Cthe centre
   • Dhollow parts inside

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9. Question 9· Electrostatics· WAEC

   Two positively charged bodies placed close together will

   • Arepel each other
   • Battract each other
   • Cneutralise each other
   • Dnot affect each other

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   Explanation and discussion