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Physics 1978 JAMB Past Questions

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21

Two resistors R1 and R2 are connected in parallel, R2 being greater than R1. The combined resistance is

  • A. less than R1
  • B. greater than R2
  • C. the sum of R1 and R2
  • D. the difference of R2 and R1
  • E. greater thanR1 but less than R2
View Answer & Discuss (20) JAMB 1978
22
Three 5 ohms resistors connected in parallel have a potential difference of 60v. applied across the combination. The current in each resistor is
  • A. 4A
  • B. 36A
  • C. 12A
  • D. 24A
  • E. 10A
View Answer & Discuss (12) JAMB 1978
23
If NEPA charges 5k per kWhr, what is the cost of operating for 24 hours a lamp required 1A on a 200v line?
  • A. 24k
  • B. 55k
  • C. 40k
  • D. 26k
  • E. 32k
View Answer & Discuss (4) JAMB 1978
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24
A magnet is moved through a coil of wire. The e.m.f. produced in the wire depends on
  • A. the number of turns in the coil
  • B. the strength of the magnet
  • C. the speed at which the magnet is moved
  • D. all of the above
  • E. none of the above
View Answer & Discuss JAMB 1978
25
In order to convert a galvanometer into an ammeter
  • A. a low resistance shunt is connected in parallel
  • B. a low resistance shunt is connected in series
  • C. a medium resistance shunt is connected in series
  • D. a high resistance shunt is connected in parallel
  • E. a high resistance shunt is connected in series
View Answer & Discuss (2) JAMB 1978
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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709