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716

As the plates of a charged variable capacitor are moved closer together, the potential difference between them

  • A. increased
  • B. decrease
  • C. remains the same
  • D. is doubled
View Answer & Discuss (5) WAEC 2001
717
What is the effective capacitance in the circuit?
  • A. 2\(\mu F\)
  • B. 6\(\mu F\)
  • C. 18\(\mu F\)
  • D. 216\(\mu F\)
View Answer & Discuss WAEC 2001
718
What is the total energy stored by the capacitors?
  • A. 2.0 x 10-4J
  • B. 1.0 x 10-4J
  • C. 9.0 x 10-2J
  • D. 1.0 x 10-2J
View Answer & Discuss WAEC 2001
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719
Three identical lamps each power 100W are connected in parallel across a potential difference of 250V. Calculate the current in the circuit
  • A. 7.5A
  • B. 2.5A
  • C. 1.2A
  • D. 0.8A
View Answer & Discuss WAEC 2001
720

An electric bulb is rated 60W, 220V. Calculate the resistance of its filament when it is operating normally

  • A. 296.7\(\Omega\)
  • B. 400.0\(\Omega\)
  • C. 512.2\(\Omega\)
  • D. 806.7\(\Omega\)
View Answer & Discuss (5) WAEC 2001
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