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1551
Three cells each of e.m.f. 1.5v and an internal resistance of 1.0\(\Omega\) are connected in parallel across a load resistance of 2.67\(\Omega\). Calculate the current in the load?
  • A. 0.26A
  • B. 0.41A
  • C. 0.50A
  • D. 0.79A
View Answer & Discuss (12) JAMB 1990
1552
When a known standard resistor of 2\(\Omega\) is connected to the 0.0cm end of a meter bridge, the balance point is found to be at 55.0cm. What is the value of the unknown resistor?
  • A. 1.10\(\Omega\)
  • B. 1.64\(\Omega\)
  • C. 2.44\(\Omega\)
  • D. 27.50\(\Omega\)
View Answer & Discuss (11) JAMB 1990
1553

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 & Discuss (17) JAMB 1990
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1554
Which of the following is an essential physical property of the wires used for making fuses?
  • A. low density
  • B. high thermal conductivity
  • C. low electrical resistivity
  • D. low melting point
View Answer & Discuss (7) JAMB 1990
1555

Which of the following is most suitable for protecting the circuit of 2000W electric iron connected to a 250V mains?

  • A. 13A
  • B. 8A
  • C. 5A
  • D. 3A
View Answer & Discuss (10) JAMB 1990
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