PassSpark

NECO SSCE Physics 2012 past questions and answers

This 2012 NECO SSCE 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 2012 set with instant marking.

Practise the full 2012 setTimed exam mode

Sample NECO SSCE Physics 2012 questions

1. A radioactive sample has a half-life of 12 days. What fraction of the original sample remains after 36 days?
  1. 1/8
  2. 1/3
  3. 1/6
  4. 1/12

Answer: A. 1/8

Thirty-six days represents three half-lives, so the remaining fraction is (1/2)^3 = 1/8.

2. What is the electric charge of an alpha particle in terms of the elementary charge e?
  1. -e
  2. +2e
  3. +e
  4. -2e

Answer: B. +2e

An alpha particle contains two protons and two neutrons, giving it a net charge of +2e.

3. A silicon diode is forward biased in a simple circuit; which statement best describes the conventional current through it?
  1. It flows equally well in either direction
  2. It is blocked completely
  3. It can flow from the anode towards the cathode
  4. It flows only from the cathode towards the anode

Answer: C. It can flow from the anode towards the cathode

Forward bias lowers the junction barrier and permits conventional current from the anode to the cathode.

4. Which charge carriers are the majority carriers in an n-type semiconductor?
  1. Positive ions
  2. Holes
  3. Protons
  4. Electrons

Answer: D. Electrons

Donor impurities provide extra electrons, making electrons the majority carriers in an n-type material.

5. An ideal transformer has 240 V across its primary winding and 12 V across its secondary winding; what is the ratio of secondary turns to primary turns?
  1. 1:20
  2. 20:1
  3. 1:12
  4. 12:240

Answer: A. 1:20

For an ideal transformer, Ns/Np = Vs/Vp = 12/240 = 1/20.

More NECO SSCE Physics years

20262025202420232022202120202019201820172016201520142013201120102009200820072006200520042003200220012000

All NECO SSCE Physics years · NECO SSCE 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.