AB is a coil of copper wire having a large number of turns. The ends of the coil are connected with a galvanometer as shown. When the north pole of a strong bar magnet is moved towards the end B of the coil, a deflection is observed in the galvanometer.
(a) State the reason for using galvanometer in the activity and why does its needle deflects momentarily when magnet is moved towards the coil.
(b) What would be observed in the galvanometer in a situation when the coil and the bar magnet both move with the same speed in the same direction? Justify your answer.
(c) State the conclusion that can be drawn from this activity. Will there be any change in the momentary deflection in the galvanometer if number of turns in the coil is increased and a more stronger magnet is moved towards the coil?
OR
What is electromagnetic induction? What is observed in the galvanometer when a strong bar magnet is held stationary near one end of a coil of large number of turns? Justify your answer.
AB is a coil of copper wire having a large number of turns. The ends of the coil are connected with a galvanometer as shown. When the north pole of a strong bar magnet is moved towards the end B of the coil, a deflection is observed in the galvanometer.
(a) State the reason for using galvanometer in the activity and why does its needle deflects momentarily when magnet is moved towards the coil.
(b) What would be observed in the galvanometer in a situation when the coil and the bar magnet both move with the same speed in the same direction? Justify your answer.
(c) State the conclusion that can be drawn from this activity. Will there be any change in the momentary deflection in the galvanometer if number of turns in the coil is increased and a more stronger magnet is moved towards the coil?
OR
What is electromagnetic induction? What is observed in the galvanometer when a strong bar magnet is held stationary near one end of a coil of large number of turns? Justify your answer.
The galvanometer is used to detect the induced current in the coil. The needle deflects momentarily when the magnet is moved towards the coil because of the induced electromotive force (EMF) in the coil due to the changing magnetic field. The direction of the induced current is given by Lenz's law, which states that the induced current always opposes the change in the magnetic flux that produces it.
Marking Scheme
- 1The galvanometer is used to detect the induced current in the coil.
- 2The needle deflects momentarily when the magnet is moved towards the coil because of the induced electromotive force (EMF) in the coil due to the changing magnetic field.
- 3The direction of the induced current is given by Lenz's law, which states that the induced current always opposes the change in the magnetic flux that produces it.
Hint
The galvanometer is used to detect the induced current in the coil. The needle deflects momentarily when the magnet is moved towards the coil because of the induced electromotive force (EMF) in the coil due to the changing magnetic field. The direction of the induced current is given by Lenz's law, which states that the induced current always opposes the change in the magnetic flux that produces it.
Quick Oral Answer
The galvanometer is used to detect the induced current in the coil. The needle deflects momentarily when the magnet is moved towards the coil because of the induced electromotive force (EMF) in the coil due to the changing magnetic field. The direction of the induced current is given by Lenz's law, which states that the induced current always opposes the change in the magnetic flux that produces it.
Analysis & Explanation
The galvanometer is used to detect the induced current in the coil. The needle deflects momentarily when the magnet is moved towards the coil because of the induced electromotive force (EMF) in the coil due to the changing magnetic field. The direction of the induced current is given by Lenz's law, which states that the induced current always opposes the change in the magnetic flux that produces it.
Common Mistakes
- 1The galvanometer is not used to detect the induced current in the coil.
- 2The needle does not deflect momentarily when the magnet is moved towards the coil.
- 3The direction of the induced current is not given by Lenz's law.
Interesting Facts
The galvanometer is used to detect the induced current in the coil.
The needle deflects momentarily when the magnet is moved towards the coil because of the induced electromotive force (EMF) in the coil due to the changing magnetic field.
The direction of the induced current is given by Lenz's law, which states that the induced current always opposes the change in the magnetic flux that produces it.
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Frequently Asked Questions
How many marks does this question carry in CBSE Class 10 Science 2022?
This question carries 4 marks in the CBSE Class 10 Science 2022 examination.
Which chapter does this question come from in Science?
This question is from the chapter "Magnetic Effects of Electric Current" in the CBSE Class 10 Science syllabus.
What topic does this question cover in Science?
This question covers the topic "Electromagnetic Induction" from CBSE Class 10 Science.
What type of question is this in the CBSE Class 10 Science 2022 paper?
This question appears in Section C in the CBSE Class 10 Science 2022 paper.