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In the activity where you wrap an electric wire around a discarded matchbox tray, place a compass needle inside, connect one wire to a battery terminal, and use another wire to momentarily join the free ends, what happens to the compass needle when the tester’s free ends are dipped into a conducting liquid like lemon juice?
- a)The needle remains stationary.
- b)The needle shows deflection.
- c)The needle spins continuously.
- d)The needle points south only.
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
In the activity where you wrap an electric wire around a discarded mat...
Understanding the Experiment
In this experiment, we are essentially creating a simple electromagnet using a wire, a battery, and a compass. When the circuit is completed, an electric current flows through the wire wrapped around the matchbox tray.
How the Compass Works
- The compass needle consists of a small magnet that aligns itself with the Earth's magnetic field.
- When electric current flows through the wire, it generates a magnetic field around the wire due to Ampère's circuital law.
Effect of Conducting Liquid
- By dipping the free ends of the wires into a conducting liquid like lemon juice, we complete a circuit that allows current to flow through the liquid.
- The conducting liquid contains ions that facilitate the flow of electricity, enhancing the overall circuit.
What Happens to the Compass Needle
- As the current flows through the wire, the magnetic field around the wire interacts with the compass needle.
- The compass needle is influenced by the magnetic field created by the electric current, causing it to deflect from its original position.
Correct Answer: Option 'B'
- The compass needle shows deflection, indicating that it is responding to the magnetic field generated by the current.
- This deflection confirms the principle that electric current produces a magnetic field, which can influence other magnetic objects nearby, such as the compass needle.
In summary, when the free ends of the wires are dipped into a conducting liquid, the compass needle deflects, demonstrating the relationship between electricity and magnetism.
In this experiment, we are essentially creating a simple electromagnet using a wire, a battery, and a compass. When the circuit is completed, an electric current flows through the wire wrapped around the matchbox tray.
How the Compass Works
- The compass needle consists of a small magnet that aligns itself with the Earth's magnetic field.
- When electric current flows through the wire, it generates a magnetic field around the wire due to Ampère's circuital law.
Effect of Conducting Liquid
- By dipping the free ends of the wires into a conducting liquid like lemon juice, we complete a circuit that allows current to flow through the liquid.
- The conducting liquid contains ions that facilitate the flow of electricity, enhancing the overall circuit.
What Happens to the Compass Needle
- As the current flows through the wire, the magnetic field around the wire interacts with the compass needle.
- The compass needle is influenced by the magnetic field created by the electric current, causing it to deflect from its original position.
Correct Answer: Option 'B'
- The compass needle shows deflection, indicating that it is responding to the magnetic field generated by the current.
- This deflection confirms the principle that electric current produces a magnetic field, which can influence other magnetic objects nearby, such as the compass needle.
In summary, when the free ends of the wires are dipped into a conducting liquid, the compass needle deflects, demonstrating the relationship between electricity and magnetism.
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Community Answer
In the activity where you wrap an electric wire around a discarded mat...
This activity uses the magnetic effect of current. When the tester’s free ends are dipped into a conducting liquid like lemon juice, current flows, producing a magnetic field that causes the compass needle to deflect, even if the current is weak.
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In the activity where you wrap an electric wire around a discarded matchbox tray, place a compass needle inside, connect one wire to a battery terminal, and use another wire to momentarily join the free ends, what happens to the compass needle when the tester’s free ends are dipped into a conducting liquid like lemon juice?a)The needle remains stationary.b)The needle shows deflection.c)The needle spins continuously.d)The needle points south only.Correct answer is option 'B'. Can you explain this answer? for Class 8 2026 is part of Class 8 preparation. The Question and answers have been prepared according to the Class 8 exam syllabus. Information about In the activity where you wrap an electric wire around a discarded matchbox tray, place a compass needle inside, connect one wire to a battery terminal, and use another wire to momentarily join the free ends, what happens to the compass needle when the tester’s free ends are dipped into a conducting liquid like lemon juice?a)The needle remains stationary.b)The needle shows deflection.c)The needle spins continuously.d)The needle points south only.Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 8 2026 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In the activity where you wrap an electric wire around a discarded matchbox tray, place a compass needle inside, connect one wire to a battery terminal, and use another wire to momentarily join the free ends, what happens to the compass needle when the tester’s free ends are dipped into a conducting liquid like lemon juice?a)The needle remains stationary.b)The needle shows deflection.c)The needle spins continuously.d)The needle points south only.Correct answer is option 'B'. Can you explain this answer?.
In the activity where you wrap an electric wire around a discarded matchbox tray, place a compass needle inside, connect one wire to a battery terminal, and use another wire to momentarily join the free ends, what happens to the compass needle when the tester’s free ends are dipped into a conducting liquid like lemon juice?a)The needle remains stationary.b)The needle shows deflection.c)The needle spins continuously.d)The needle points south only.Correct answer is option 'B'. Can you explain this answer? for Class 8 2026 is part of Class 8 preparation. The Question and answers have been prepared according to the Class 8 exam syllabus. Information about In the activity where you wrap an electric wire around a discarded matchbox tray, place a compass needle inside, connect one wire to a battery terminal, and use another wire to momentarily join the free ends, what happens to the compass needle when the tester’s free ends are dipped into a conducting liquid like lemon juice?a)The needle remains stationary.b)The needle shows deflection.c)The needle spins continuously.d)The needle points south only.Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 8 2026 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In the activity where you wrap an electric wire around a discarded matchbox tray, place a compass needle inside, connect one wire to a battery terminal, and use another wire to momentarily join the free ends, what happens to the compass needle when the tester’s free ends are dipped into a conducting liquid like lemon juice?a)The needle remains stationary.b)The needle shows deflection.c)The needle spins continuously.d)The needle points south only.Correct answer is option 'B'. Can you explain this answer?.
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