Search SchoolNGR

Sunday, 21 June 2026
Register . Login

Physics Past Questions and Answers

Topic: Current Electricity

Jamb Physics Questions - Current Electricity

Question 26:
Three resistors, with substances 250\(\Omega\), 500\(\Omega\) and 1k\(\Omega\) are connected in series. A 6V battery is connected to either end of the combination. Calculate the pot3ential difference between the end of the 250\(\Omega\) resistor.
  • A 0.20V
  • B 0.86V
  • C 1.71V
  • D 3.43V
View Answer & Explanation
Question 27:
A calibrated potentiometer is used to measure the e.m.f. of a cell because the
  • A Internal resistance of a cell is small compared with that of the potentiometer
  • B Potentiometer has a linear scale
  • C Potentiometer takes no current from the cell
  • D Resistance of the potentiometer is less than that of a voltmeter
View Answer & Explanation
Question 28:
An ammeter of resistance 1.0\(\Omega\) has a full-scale deflection of 50mA. Determine the resultant full-scale deflection of the meter when a shunt of 0.0111\(\Omega\) is connected across its terminals.
  • A 400mA
  • B 450mA
  • C 500mA
  • D 550mA
View Answer & Explanation
Question 29:
In the above circuit diagrams A is the ammeter and V is the Voltmeter. Which of the circuits is correct for finding the correct value of the resistance R
  • A I
  • B II
  • C III
  • D IV
View Answer & Explanation
Question 30:
The total energy required to send a unit positive charge round a complete electrical circuit is the
  • A Kinetic energy
  • B Potential difference
  • C Electromotive force
  • D Electrical energy
View Answer & Explanation