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Level 1 Worksheet: Magnetic Effects of Electric Current

Class: 10 Science Topic: Concepts & Rules Max. Questions: 60
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Section A: Magnetic Field & Field Lines
  1. Define Magnetic Field. Is it a scalar or vector quantity?
  2. List two important properties of magnetic field lines.
  3. Why do two magnetic field lines never intersect each other?
  4. Draw a diagram showing the pattern of magnetic field lines around a bar magnet.
  5. State the direction of magnetic field lines (i) inside and (ii) outside a bar magnet.
  6. Where is the magnetic field strongest in a plot of field lines?
  7. What is the function of a magnetic compass?
  8. Describe Oersted's experiment briefly.
  9. Draw the pattern of magnetic field lines due to a straight current carrying conductor.
  10. State the rule used to find the direction of magnetic field associated with a current carrying conductor.
  11. How does the strength of magnetic field produced by a straight conductor depend on (i) current, (ii) distance from conductor?
  12. Draw the magnetic field lines due to a circular loop carrying current.
  13. How can you identify the north and south poles of a current carrying loop? (Clock Face Rule).
  14. How does a uniform magnetic field look like diagrammatically?
  15. What happens to a compass needle when placed near a current carrying wire?
Section B: Electromagnets & Solenoids
  1. What is a Solenoid?
  2. Draw the pattern of magnetic field lines produced by a current carrying solenoid.
  3. List two similarities between a solenoid and a bar magnet.
  4. Mention three ways to increase the strength of magnetic field inside a solenoid.
  5. What is an Electromagnet?
  6. Distinguish between a permanent magnet and an electromagnet. (Two points).
  7. Why is soft iron used as the core of an electromagnet?
  8. Why is steel not suitable for making electromagnets?
  9. State the polarity of the face of a solenoid if current flows in the clockwise direction.
  10. State the polarity of the face of a solenoid if current flows in the anti-clockwise direction.
  11. Give two practical applications of electromagnets.
  12. What happens to the magnetic field of an electromagnet if the current is switched off?
  13. Can we use copper as the core of a solenoid to make an electromagnet? Explain.
  14. Draw a circuit diagram to make an electromagnet using a soft iron nail.
  15. Compare the field inside a long solenoid with that of a bar magnet.
Section C: Force on Conductor & EMI
  1. Under what condition does a current carrying conductor experience a force in a magnetic field?
  2. State Fleming's Left Hand Rule.
  3. When is the force experienced by a current carrying conductor (i) Maximum, (ii) Minimum?
  4. Name the device which uses current carrying conductors and magnetic fields to produce mechanical motion.
  5. What is the principle of an Electric Motor?
  6. What is the function of the Split Ring (Commutator) in an electric motor?
  7. What is the function of Carbon Brushes in an electric motor?
  8. Define Electromagnetic Induction (EMI).
  9. State Fleming's Right Hand Rule.
  10. Name the device used to convert mechanical energy into electrical energy.
  11. Differentiate between the functions of Fleming's Left Hand Rule and Fleming's Right Hand Rule.
  12. List two methods of inducing current in a coil.
  13. What is the difference between AC and DC?
  14. Draw a graph showing Direct Current and Alternating Current with time.
  15. What is a Galvanometer? How is it different from an Ammeter?
Section D: Domestic Electric Circuits
  1. What are the three types of wires used in domestic circuits? Mention their insulation colors.
  2. What is the function of the Earth Wire? Why is it important?
  3. What is the potential difference between Live and Neutral wires in India?
  4. What is Short-Circuiting? How does it happen?
  5. What is Overloading? Brief two causes.
  6. What is an Electric Fuse? On what principle does it work?
  7. How does a fuse wire protect electrical appliances?
  8. Why is a fuse wire made of a material with low melting point?
  9. A fuse is rated 5A. What does this mean?
  10. Why are domestic appliances connected in parallel? Give two reasons.
  11. Calculate the fuse rating for an appliance of 1.5 kW working on 220 V supply.
  12. What is the frequency of AC used in India? How does it differ from DC frequency?
  13. Why is it dangerous to touch a live wire?
  14. What precautions should be taken to avoid overloading in domestic circuits?
  15. Why should the switch always be connected in the live wire?