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Physics 2012 WAEC Past Questions

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31

Which of the following sets of coloured light is/are secondary colours i. Red, Blue and green ii. Blue, cyan and magneta iii. Green, Magenta and yellow, IV Yellow, Cyan and Magenta

  • A. i and ii only
  • B. ii and iii only
  • C. iv only
  • D. i, ii and iv only
View Answer & Discuss (6) WAEC 2012
32

When two like charges are brought together, the potential energy of the system formed will

  • A. increase because work is done against the field
  • B. increase because work is done by the field
  • C. decrease because work is done by the field
  • D. decrease because work is done against the field
View Answer & Discuss (2) WAEC 2012
33

Two capacitors, each of capacitance 2\(\mu\)F are connected in parallel. If the p.d across them is 120V, calculate the charge on each capacitor

  • A. 6.0 x 10-5C
  • B. 1.2 x 10-4C
  • C. 2.4 x 10-4C
  • D. 4.8 x 10-4C
View Answer & Discuss (4) WAEC 2012
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34
Which of the following properties is an advantage of lead-acid accumulator over an alkaline accumulator?
  • A. possesses low internal resistance
  • B. can be recharges
  • C. has shorter life span
  • D. possesses high e.m.f
View Answer & Discuss (7) WAEC 2012
35

Six dry cells each of e.m.f. 2.0 and internal resistance of 1.0\(\Omega\) are connected in parallel across a load of 3.0\(\Omega\). Calculate the effective current in the circuit.

  • A. 0.63A
  • B. 0.50A
  • C. 0.31A
  • D. 0.22A
View Answer & Discuss (5) WAEC 2012
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