Class 10 Electro-magnetism Mock Test (ICSE)

Topics in Electro-magnetism

• Magnetic field due to a current-carrying wire and coil
• Force on a current-carrying conductor
• DC motor
• Electromagnetic induction
• AC generator
• Transformer

Electro-magnetism practice questions with answers

1. Q1Multiple choice·1 mark
   An alternating current (AC) generator is a device that primarily converts:

   1. (a)Chemical energy into electrical energy
   2. (b)Mechanical energy into electrical energy
   3. (c)Electrical energy into mechanical energy
   4. (d)Electrical energy into light energy
   Show answer and step marks

   1. Correct option: (b) Mechanical energy into electrical energy+1

   Answer: (b)
2. Q2Multiple choice·1 mark
   Which of the following components in a direct current (DC) motor reverses the direction of current in the armature coil every half rotation, ensuring continuous rotation in the same direction?

   1. (a)Field magnet
   2. (b)Split-ring commutator
   3. (c)Carbon brushes
   4. (d)Slip rings
   Show answer and step marks

   1. Correct option: (b) Split-ring commutator+1

   Answer: (b)
3. Q3Multiple choice·1 mark
   A transformer is a device used to:

   1. (a)Step up or step down alternating voltage
   2. (b)Convert direct current to alternating current
   3. (c)Step up or step down direct voltage
   4. (d)Convert alternating current to direct current
   Show answer and step marks

   1. Correct option: (a) Step up or step down alternating voltage+1

   Answer: (a)
4. Q4Multiple choice·1 mark
   The phenomenon of production of an induced electric current in a closed circuit whenever the magnetic flux linked with the circuit changes is called:

   1. (a)Heating effect of electric current
   2. (b)Self-induction only
   3. (c)Magnetic effect of electric current
   4. (d)Electromagnetic induction
   Show answer and step marks

   1. Correct option: (d) Electromagnetic induction+1

   Answer: (d)

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