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Sunday, 21 June 2026
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Physics Past Questions and Answers

Topic: Current Electricity

Jamb Physics Questions - Current Electricity

Question 51:
In the diagram above, if each of the resistors can dissipate a maximum of 18W without becoming excessively heated, what is the maximum power the circuit can dissipate?
  • A 27W
  • B 18W
  • C 9W
  • D 5W
View Answer & Explanation
Question 52:
I the diagram above, what would happen to the current I, if another resistor, R2, is connected in parallel to R1?
  • A It will increase because the equivalent resistance will increase
  • B It will decrease if R<sub style='font-size: smaller;'>2</sub> is greater than R<sub style='font-size: smaller;'>1</sub>
  • C It will increase because the effective resistance will decrease
  • D It will decrease if R<sub style='font-size: smaller;'>2</sub> is less than R<sub style='font-size: smaller;'>1</sub>
View Answer & Explanation
Question 53:
If 16mA of current flows through a conductor in one second, the number of electron transported per seconds is
[1 electronic charge = 1.6 x 10-19C]
  • A 1.00 x 10<sup style='font-size: smaller;'>20</sup>
  • B 2.56 x 10<sup style='font-size: smaller;'>-18</sup>
  • C 2.56 x <sup style='font-size: smaller;'>-17</sup>
  • D 1.00 x 10<sup style='font-size: smaller;'>17</sup>
View Answer & Explanation
Question 54:
The resistance of a pieces of wire of lenght 20m are crossed-sectional area 8 x 10 6m2is?
[Resistivity of the wire = 4 x 10-7 Ω m]
  • A 5.0 Ω
  • B 0.5 Ω
  • C 10.0 Ω
  • D 1.0 Ω
View Answer & Explanation
Question 55:
The figure above shows three capacitors, 2μF, 3μF and 6μF connected in series. If the p.d across the system is 12V, the p.d, across the 6μF capacitor is
  • A 4V
  • B 12V
  • C 2V
  • D 6V
View Answer & Explanation