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Vidaara.orgClass 10 · Physics
CodeVID-P10-04-EIG-01
Electromagnetic Induction & Generator — Assignment
Chapter: Magnetic Effects of Electric Current
Topic: Electromagnetic Induction & Generator
Maximum Marks: 30
Time: 60 minutes
Name: ____________________ Roll No.: __________ Date: ____________

General Instructions

  • All questions are compulsory.
  • Section A carries 1 mark each, Section B 2 marks, Section C 3 marks and Section D 5 marks.
  • Draw neat labelled diagrams wherever asked. For full solutions, raise your doubts with your teacher.
Section A — Multiple Choice Questions 5 × 1 = 5 marks
1.
A current produced by a changing magnetic field is called:
  • A.direct current
  • B.induced current
  • C.fuse current
  • D.leakage current
2.
Fleming's right-hand rule is used in a:
  • A.motor
  • B.generator
  • C.fuse
  • D.battery
3.
An AC generator uses:
  • A.split rings
  • B.slip rings
  • C.no rings
  • D.a fuse
4.
Indian mains frequency is:
  • A.60 Hz
  • B.50 Hz
  • C.100 Hz
  • D.25 Hz
5.
The earth wire is usually coloured:
  • A.red
  • B.green
  • C.black
  • D.blue
Section B — Short Answer (2 marks) 3 × 2 = 6 marks
6.
State Fleming's Right-Hand Rule.
7.
What energy conversion occurs in a generator?
8.
Why are domestic appliances connected in parallel?
Section C — Short Answer (3 marks) 2 × 3 = 6 marks
9.
Explain the purpose of earthing and the fuse in a domestic circuit.
10.
Differentiate between AC and DC generators.
Section D — Long Answer (5 marks) 1 × 5 = 5 marks
11.
Describe the construction and working of an AC generator with a labelled diagram, and explain how a DC generator differs from it.

Answer Key

Section A — Multiple Choice Questions
  1. (B) induced current
  2. (B) generator
  3. (B) slip rings
  4. (B) 50 Hz
  5. (B) green
Section B — Short Answer (2 marks)
  1. Forefinger = field, thumb = motion, middle finger = induced current.
  2. Mechanical energy is converted into electrical energy.
  3. Each gets full voltage and can be switched on/off independently.
Section C — Short Answer (3 marks)
  1. Earthing carries leakage current to ground; fuse melts to break circuit on excess current.
  2. AC uses slip rings (current reverses); DC uses split ring (one-direction output).
Section D — Long Answer (5 marks)
  1. Coil rotates in field; slip rings give AC; split-ring commutator instead gives DC.
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