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BECE (Ghana) Electric Circuits — practice questions

Explore 6 free Electric Circuits questions in BECE (Ghana) Science. Open each question or exercise to read its content, reference answers and available explanation.

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Electric Circuits questions and exercises with answers

Showing questions 1–6 of 6.

What is an electric current in a metal wire?Read the answer and worked solution →Why is the metal inside a household cable covered in plastic?Read the answer and worked solution →Why does a fuse protect a circuit from catching fire?Read the answer and worked solution →How is a parallel circuit different from a series circuit?Read the answer and worked solution →In which unit is electric current measured?Read the answer and worked solution →Sort the electrical conductorsRead the answer and worked solution →

Worked practice questions

What is an electric current in a metal wire?

  1. Moving protons
  2. Moving neutrons
  3. Moving electrons
  4. Moving molecules
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Correct answer: C. Moving electrons

1. In a metal the electrons are free to move rather than being tied to one atom. 2. A cell in a complete circuit pushes all of them in the same general direction. 3. That movement of electrons through the conductor is the electric current. 4. Protons and neutrons stay locked in the nucleus and do not travel. _Source: Siyavula Natural Sciences Grade 8 (CC BY 4.0), What is an electric current?_

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Why is the metal inside a household cable covered in plastic?

  1. Plastic is a conductor
  2. Plastic is a resistor
  3. Plastic is a magnet
  4. Plastic is an insulator
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Correct answer: D. Plastic is an insulator

1. A conductor lets electric charge move through it, and metal does this well. 2. An insulator does not let electric charge move through it. 3. Plastic is an insulator, so it keeps the current inside the metal. 4. That is what makes the cable safe to hold. _Source: Siyavula Natural Sciences Grade 8 (CC BY 4.0), Resistors_

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Why does a fuse protect a circuit from catching fire?

  1. Its wire melts and breaks the circuit
  2. Its wire cools and slows the current
  3. Its wire bends and blocks the current
  4. Its wire glows and warns the user
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Correct answer: A. Its wire melts and breaks the circuit

1. An electric current heats up any resistor it passes through. 2. A fuse holds a thin wire made of metal with a low melting point. 3. If the current grows too large the wire heats up and melts. 4. The melted wire leaves a gap, so the circuit is broken and the current stops. _Source: Siyavula Natural Sciences Grade 8 (CC BY 4.0), What are fuses?_

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