O LevelPhysicsCambridge (CIE)Exam Questions4. Electricity & Magnetism4.3 Electric Circuits

Electric Circuits (Cambridge (CIE) O Level Physics): Exam Questions

Exam code: 5054

3 hours40 questions

Select a download format for 4.3 Electric Circuits

Scroll for more

Select an answer set to view for
4.3 Electric Circuits

Easy
Medium
Hard
1
Sme Calculator
1 mark

This is the circuit symbol for which component?

q1-easy-mcq-4-3-electrical-circuits-cie-igcse-physics

  • A fuse

  • A buzzer

  • A transistor

  • A relay

Choose your answer

2
Sme Calculator
1 mark

Which of the following circuit symbols is for a thermistor?

q2-easy-mcq-4-3-electrical-circuits-cie-igcse-physics

    Choose your answer

    3
    Sme Calculator
    1 mark

    Which diagram shows the correct symbol for a diode, and the correct direction of current moving through it?

    4-3-5-e-diode-current

      Choose your answer

      4
      1 mark

      What is the purpose of a fuse in a mains electrical circuit?

      • to reduce the current flowing through the appliance

      • to increase the resistance of the circuit so the appliance works safely

      • to break the circuit if the current becomes too large

      • to prevent the voltage from becoming too high

      Choose your answer

      1
      Sme Calculator
      1 mark

      The diagram shows two resistors connected in series with a battery.

      q8-medium-mcq-4-3-electrical-circuits-cie-igcse-physics

      What is the current through the battery?

      • 1.5 A

      • 150 A

      • 0.67 A

      • 15 A

      Choose your answer

      2
      Sme Calculator
      1 mark

      A book shop owner sets up the circuit below, but they find that the lamp is too dim.

      q9-medium-mcq-4-3-electrical-circuits-cie-igcse-physics

      What change can be made to the circuit to increase the brightness of the bulb?

      • Putting another resistor in parallel with the battery.

      • Putting a resistor in parallel with the bulb.

      • Putting another resistor in series with the resistor.

      • Putting another resistor in parallel with the resistor.

      Choose your answer

      3
      Sme Calculator
      1 mark

      Which electrical symbol represents a fuse?

      q26-cie-ol-physics-specimen-paper-1-mcq

        Choose your answer

        4
        Sme Calculator
        1 mark

        Three identical resistors are joined in series to a battery.

        q27-cie-ol-physics-specimen-paper-1-mcq

        Voltmeter Q reads 8.0 V.

        What is the reading on voltmeter P and what is the e.m.f. of the battery?

         

        Reading on P/V

        E.m.f. of battery /V

        A 

        4.0

        8.0

        B

        4.0

        12

        C

        8.0

        8.0

        D

        8.0

        12

          Choose your answer

          1
          Sme Calculator
          1 mark

          A homeowner buys a security light that switches on automatically when it gets dark.

          The security light contains the circuit, shown below.

          q1-hard-mcq-4-3-electrical-circuits-cie-igcse-physics

          When it gets dark, what happens to the resistance of the LDR, and what happens to the potential difference across the LDR?

           

          Resistance of LDR

          p.d. across LDR

          A

          increases

          increases

          B

          decreases

          increases

          C

          increases

          decreases

          D

          decreases

          decreases

            Choose your answer

            2
            Sme Calculator
            1 mark

            A student sets up four circuits containing diodes. These circuits are shown below.

            q2-hard-mcq-4-3-electrical-circuits-cie-igcse-physics

            Which of the circuits will produce a rectified current through the bulb?

              Choose your answer

              3
              Sme Calculator
              1 mark

              Two resistors are connected in parallel.

              q3-hard-mcq-4-3-electrical-circuits-cie-igcse-physics

              What is the combined resistance of the combination?

              • 20 Ω

              • 4.8 Ω

              • 0.21 Ω

              • 1.5 Ω

              Choose your answer

              4
              Sme Calculator
              1 mark

              Two resistors are connected in parallel.

              q4-hard-mcq-4-3-electrical-circuits-cie-igcse-physics

              The current through the top resistor is 2.0 A.

              What is the reading on the ammeter?

              • 6.0 A

              • 2.0 A

              • 4.0 A

              • 3.5 A

              Choose your answer

              5
              Sme Calculator
              1 mark

              A 10 Ω and a 30 Ω resistor are connected in series, as shown in the diagram below, making a potential divider circuit.

              q5-hard-mcq-4-3-electrical-circuits-cie-igcse-physics

              What would be the reading on the voltmeter?

              • 2.0 V

              • 6.0 V

              • 4.0 V

              • 8.0 V

              Choose your answer

              6
              Sme Calculator
              1 mark
              q6-hard-mcq-4-3-electrical-circuits-cie-igcse-physics

              Which of the following statements about the current in ammeters X, Y and Z is correct?

              • The current through X equals the current through Y + the current through Z.

              • The current through X is equal to the current through Z.

              • The current through X is equal to the current through Y.

              • The current through Y is greater than the current through Z.

              Choose your answer

              7
              Sme Calculator
              1 mark
              q7-hard-mcq-4-3-electrical-circuits-cie-igcse-physics

              All the light bulbs in the diagrams above are identical. Each one is rated as ‘10 W 230 V’.

              In which of the diagrams are all the bulbs working at their normal brightness?

                Choose your answer

                8
                Sme Calculator
                1 mark

                A student connects together some identical resistors in three different combinations, as shown in the diagram.

                Which of the answers below shows the correct order of the combinations from the lowest resistance to the highest?

                q8-hard-mcq-4-3-electrical-circuits-cie-igcse-physics

                • P →  Q → R

                • Q → P → R

                • Q → R → P

                • P → R → Q

                Choose your answer

                9
                Sme Calculator
                1 mark

                A teacher writes a set of notes about two non-identical bulbs which are connected in parallel.

                He makes one mistake. Which of the statements below is incorrect?

                • They have the same current flowing through them.

                • They have the same potential difference across them.

                • They can be switched on and off individually.

                • If one bulb blows, the other will continue to work.

                Choose your answer

                10
                Sme Calculator
                1 mark

                The diagram shows a potential divider circuit. A power supply is connected in series with a 6.0 space straight capital omega resistor and an 8.0 space straight capital omega resistor.

                A voltmeter connected across the 8.0 space straight capital omega resistor reads 12 space straight V.

                A circuit diagram showing a power supply connected to two resistors in series. The first resistor is labelled 6.0 Ω and the second is labelled 8.0 Ω. A voltmeter is connected across the 8.0 Ω resistor.

                What is the electromotive force (e.m.f.) of the power supply?

                • 9.0 space straight V

                • 14 space straight V

                • 21 space straight V

                • 28 space straight V

                Choose your answer