PassSpark

WAEC WASSCE Physics 2016 past questions and answers

This 2016 WAEC WASSCE Physics set has 40 practice questions. Try these 5 free sample questions, tap a question to reveal the answer and explanation. Then practise the whole 2016 set with instant marking.

Practise the full 2016 setTimed exam mode

Sample WAEC WASSCE Physics 2016 questions

1. A radioactive sample has a half-life of 5 hours. If its initial mass is 80 mg, what mass remains after 15 hours?
  1. 10 mg
  2. 20 mg
  3. 5 mg
  4. 40 mg

Answer: A. 10 mg

Fifteen hours is three half-lives, so the remaining mass is 80/2^3 = 10 mg.

2. In a photoelectric experiment, the stopping potential for emitted electrons is 2.0 V. What is their maximum kinetic energy in electronvolts?
  1. 0.5 eV
  2. 2.0 eV
  3. 4.0 eV
  4. 8.0 eV

Answer: B. 2.0 eV

An electron stopped by a potential difference of 2.0 V has maximum kinetic energy of 2.0 eV.

3. A single diode connected as a half-wave rectifier allows current through the load during
  1. both halves of every cycle
  2. neither half of any cycle
  3. one half of each cycle
  4. only when the supply is direct current

Answer: C. one half of each cycle

A single diode conducts in one direction and therefore passes only one half-cycle of an alternating supply.

4. For a two-input NOR gate, under which input condition is the output 1?
  1. Both inputs are 1
  2. Exactly one input is 1
  3. At least one input is 1
  4. Both inputs are 0

Answer: D. Both inputs are 0

A NOR gate gives the inverse of the OR output, so it is high only when both inputs are low.

5. In a hydroelectric power station, the principal energy conversion is from
  1. gravitational potential energy of water to electrical energy
  2. chemical energy of water to sound energy
  3. nuclear energy to heat energy
  4. electrical energy to gravitational potential energy

Answer: A. gravitational potential energy of water to electrical energy

Falling water loses gravitational potential energy that drives turbines and generators to produce electrical energy.

More WAEC WASSCE Physics years

20262025202420232022202120202019201820172015201420132012201120102009200820072006200520042003200220012000

All WAEC WASSCE Physics years · WAEC WASSCE subjects

PassSpark questions are original practice questions written to each exam's syllabus and format, in the style of past questions. They are not official past papers and are not affiliated with JAMB, WAEC, NECO, any university or any exam body.