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Physics 2020 JAMB Past Questions

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11

If a source of solid is moving, a stationary listener will hear a sound of different frequency. This is called?

  • A. doppler effect
  • B. resonance
  • C. ultra sound
  • D. rarefaction
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12

Which of the following can be described as high tension transmission? 

  • A. High resistance and low voltage
  • B. Low current and high voltage
  • C. High current and low voltage
  • D. High current and low resistance
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13

What is the cost of running five 50W lamps and four 100W lamps for 10 hours if electrical energy costs 2 Kobo per KWh?

  • A. N0.65
  • B. N0.39
  • C. N3.90
  • D. N0.13
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14

Tha mass of a proton is approximately equal to that of 

  • A. an \(\alpha\)-particle
  • B. a \(\beta\)-Particle
  • C. a neutron
  • D. an electron
View Answer & Discuss (7) JAMB 2020
15

A transformer has 300 turns of wire in the primary coil and 30 turns in the secondary coil. If the input voltage is 100 volts, the output voltage is 

  • A. 5 volts
  • B. 10 volts
  • C. 15 volts
  • D. 20 volts
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