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Unit - 3.2 Various Forms Of Energy And Their Interconversion PHYSICS - Unit - 3.2 Various Forms Of Energy And Their Interconversion

ICSE - STD 7 - PHYSICS (ICSE - English Medium). 28 questions in this chapter.

Question types

Unit - 3.2 Various Forms Of Energy And Their Interconversion question types

28 questions across 7 question groups — pick any mix to generate a PHYSICS paper with step-by-step answer keys.

28
Questions
7
Question groups
5
Question types
Sample Questions

Unit - 3.2 Various Forms Of Energy And Their Interconversion questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 1MCQ1 Mark
When we wind a watch, the muscular energy changes into :
  • A
    sound energy
  • B
    magnetic energy
  • C
    kinetic energy
  • ✓
    potential energy

Answer: D.

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Q 2MCQ1 Mark
Flowing water turns the blade of turbine because it possesses:
  • ✓
    potential energy
  • B
    kinetic energy
  • C
    Both (a) and (b)
  • D
    none of these

Answer: A.

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Q 3MCQ1 Mark
Energy is neither created nor destroyed in a system, is known as :
  • A
    law of conservation of mass
  • B
    law of conversion of mass
  • ✓
    law of conservation of energy
  • D
    law of conversion of energy

Answer: C.

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Q 4MCQ1 Mark
A vibrating body possesses :
  • ✓
    sound energy
  • B
    light energy
  • C
    electric energy
  • D
    magnetic energy

Answer: A.

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Q 5MCQ1 Mark
Light of a bulb is an example of conversion of :
  • A
    heat energy into light energy
  • B
    electric energy into heat energy
  • C
    electric energy into light energy
  • ✓
    Both (b) and (c)

Answer: D.

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Q 9[1 Mark Question Answer]1 Mark
Given below statement is incorrect. Write the correct statement :
When an electric current flows through an electric bulb, the electric energy first changes to light energy and then to heat energy.
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Q 15[5 Mark Question Answer]5 Marks
(a) State the law of conservation of energy.
(b) By giving an example explain law of conservation of energy.
(c) Show that the sum of potential energy and kinetic energy remains the same by giving the example of roller coaster car.
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Q 28Match The Following.5 Marks
Column AColumn B
1.A device which converts electric energy into heat and light energy.1.Electromagnet
2.A device which converts electric energy into sound energy.2.Electric motor
3.A device which converts electric energy into magnetic energy3.loud speaker
4.A device which converts light energy into electric energy.4.electric bulb
5.A device which converts electric energy into mechanical energy.5.photo-voltaic cell
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