JAMB and WAEC Physics questions

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

1. Question 221· Electrostatics· WAEC

   Two like charges

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

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2. Question 222· Electrostatics· JAMB

   When a plastic rod is rubbed with a cloth, it becomes charged because

   • Aneutrons are removed
   • Bprotons move into the rod
   • Cthe rod is heated
   • Delectrons are transferred between the rod and the cloth

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3. Question 223· Electrostatics· JAMB

   A lightning conductor protects a building by

   • Astoring charge
   • Bdischarging charge through its sharp points to earth
   • Cattracting rain
   • Dinsulating the building

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4. Question 224· Electrostatics· WAEC

   An ebonite rod rubbed with fur becomes

   • Auncharged
   • Bpositively charged
   • Cmagnetised
   • Dnegatively charged

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5. Question 225· Electrostatics· JAMB

   Electric field lines point from

   • Anegative charges to positive charges
   • Bpositive charges to negative charges
   • Cnorth to south
   • Dearth to the charge always

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6. Question 226· Electrostatics· JAMB

   When a conductor is charged by induction, the charge it finally acquires is

   • Azero
   • Bthe same as that of the inducing charge
   • Calways positive
   • Dopposite to that of the inducing charge

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7. Question 227· Electrostatics· JAMB

   Two charges of like sign placed near each other will:

   • Aattract
   • Bneutralise
   • Crepel
   • Dnot interact

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8. Question 228· Electrostatics· WAEC

   A gold-leaf electroscope is used to

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

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9. Question 229· 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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10. Question 230· Electrostatics· JAMB

    Two point charges attract with force F. If each charge is doubled and the distance between them is also doubled, the new force is

    • AF/4
    • B4F
    • CF
    • D2F

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11. Question 231· Electrostatics· JAMB

    A positively charged rod is brought near the cap of a negatively charged electroscope. The leaf

    • Arises further
    • Bfalls (its divergence decreases)
    • Cstays unchanged
    • Dfalls and then rises at once

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12. Question 232· Electrostatics· JAMB

    A lightning conductor works on the principle of

    • AOhm's law
    • Belectromagnetic induction
    • Cthe heating effect of current
    • Daction at sharp points

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13. Question 233· 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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14. Question 234· Electrostatics· WAEC

    Lightning conductors protect buildings by

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

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15. Question 235· Electrostatics· JAMB

    The SI unit of electric field intensity is

    • Avolt
    • Bcoulomb per newton
    • Cnewton per coulomb
    • Dfarad

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16. Question 236· Electrostatics· JAMB

    One volt is equal to one

    • Acoulomb per second
    • Bjoule per coulomb
    • Cjoule per second
    • Dnewton per coulomb second

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17. Question 237· 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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18. Question 238· Electrostatics· JAMB

    Find the electric field strength 0.2 m from a point charge of 4 × 10⁻⁹ C. [k = 9 × 10⁹ N m²/C²]

    • A180 N/C
    • B900 N/C
    • C36 N/C
    • D9,000 N/C

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19. Question 239· 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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20. Question 240· Elementary modern physics· JAMB

    80 g of a radioactive substance decays to 10 g in 15 days. Find its half-life.

    • A7.5 days
    • B5 days
    • C3 days
    • D15 days

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