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1556
Electrical power is transmitted at a high voltage rather than low voltage because the amount of energy loss is reduced due to
  • A. heat dissipation
  • B. production of eddy currents
  • C. excessive current discharge
  • D. excessive voltage distance
View Answer & Discuss (1) JAMB 1990
1557
A lamp is rated 240V, 60W. The resistance of the filament is
  • A. 960\(\Omega\)
  • B. 16\(\Omega\)
  • C. 15\(\Omega\)
  • D. 4\(\Omega\)
View Answer & Discuss (4) JAMB 1990
1558
A 0 - 10mA galvanometer with a coil resistance of 30\(\Omega\) can be converted to a 0 - 10A ammeter by using
  • A. 0.03\(\Omega\) series resistor
  • B. 0.03\(\Omega\) shunt resistor
  • C. 9.99\(\Omega\) shunt resistor
  • D. 9.99\(\Omega\) series resistor
View Answer & Discuss (5) JAMB 1990
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1559
The number of neutrons contained in the nucleus \(^{238}_{92}U\) is
  • A. 92
  • B. 146
  • C. 238
  • D. 330
View Answer & Discuss (1) JAMB 1990
1560
What precaution should a manufacturer take to ensure that energy loss in a transformer is minimized?
  • A. the winding of the transformer should be made of high resistance wire
  • B. the core should be made of thin sheets of metal
  • C. no magnetic material should be used to make the core
  • D. the flux linking the primary with the secondary coils should be minimum
View Answer & Discuss (3) JAMB 1990
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts