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1346
The energy stored in a simple cell is
  • A. electrical
  • B. nuclear
  • C. thermal
  • D. chemical
View Answer & Discuss WAEC 2014
1347

Which of the following conditions occur at resonance in a series RLC circuit? i. Impedance equals resistance ii. Current is maximum iii. Reactance is maximum iv. Current and voltage are 90° out of phase

  • A. i and ii only
  • B. i and iii only
  • C. i, ii and iii only
  • D. i, ii, iii and iv
View Answer & Discuss (7) WAEC 2014
1348
An electric motor converts
  • A. electrical energy to mechanical energy
  • B. mechanical energy to electrical energy
  • C. mechanical energy to chemical energy
  • D. electrical energy to thermal energy
View Answer & Discuss (1) WAEC 2014
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1349
A 15 \(\mu F\) capacitor is connected to a 240V, 50Hz ac. source. Calculate the reactance of the capacitance [\(\pi = 3.142\)]
  • A. 16\(\Omega\)
  • B. 68\(\Omega\)
  • C. 106\(\Omega\)
  • D. 212\(\Omega\)
View Answer & Discuss (1) WAEC 2014
1350
Two identical charges situated 20cm apart in vacuum repel each other with a force of 1.0N.Calculate the value of each other with a force of 1.0N. Calculate the value of each charge. [(14 \(\pi \varepsilon_o)^{-1}\) = 9 x 109Nm2C-2]
  • A. 21\(\mu C\)
  • B. 3.6\(\mu C\)
  • C. 4.0\(\mu C\)
  • D. 4.4\(\mu C\)
View Answer & Discuss WAEC 2014
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