Tag: physics

Questions Related to physics

Energy stored in the molecules of matter is called :

physics the essence of change forms of energy and energy conservation energy for everything forms of energy

  1. Heat energy

  2. Potential energy

  3. Chemical energy

  4. Light energy

Show answer
Correct Option: C
Explanation:

Chemical Energy is the energy which is stored in the molecules of matter and holds the particles of molecule together.


Hence, correct answer is option is $C$

A torch converts________ energy to______ energy.

physics the essence of change forms of energy and energy conservation energy for everything forms of energy

  1. chemical, heat

  2. electrical, chemical

  3. chemical, light

  4. light, electrical

Show answer
Correct Option: C
Explanation:

A torch uses the energy released by the chemical reaction inside the cell and converts it to light energy by making the bulb  glow.


Hence, correct answer is option $C$

Electric heater converts:

physics the essence of change forms of energy and energy conservation energy for everything forms of energy

  1. Electric energy into chemical energy

  2. chemical energy into electric energy

  3. heat energy into electric energy

  4. electric energy and heat energy

Show answer
Correct Option: D
Explanation:

An electric heater converts electrical energy to heat energy.

The energy released on burning coal, oil, wood or gas is:

physics the essence of change forms of energy and energy conservation energy for everything forms of energy

  1. kinetic energy

  2. heat energy

  3. light energy

  4. solar energy

Show answer
Correct Option: B
Explanation:

The energy released on burning coal, oil, wood or gas is the heat energy.

A vibrating body possesses:

physics the essence of change forms of energy and energy conservation energy for everything forms of energy

  1. electrical energy

  2. nuclear energy

  3. potential energy

  4. sound energy

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Correct Option: D
Explanation:

A vibrating body possesses sound energy. It is sensed by our ears.

When two dry bodies are rubbed together, they get charged due to movement of free electrons from one body to the other body, so they possess:

physics the essence of change forms of energy and energy conservation energy for everything forms of energy

  1. nuclear energy

  2. electrical energy

  3. hydro energy

  4. light energy

Show answer
Correct Option: B
Explanation:

When two dry bodies are rubbed together, they get charged due to movement of free electrons from one body to the other body, so they possess electrical energy.

The energy possessed by fast moving water is called:

physics the essence of change forms of energy and energy conservation energy for everything forms of energy

  1. solar energy

  2. elastic energy

  3. hydro energy

  4. geothermal energy

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Correct Option: C
Explanation:

The energy possessed by the fast moving water is called the hydro energy. This energy is used to generate electricity in hydroelectric power stations.

A magnet can attract iron filings as it possesses:

physics the essence of change forms of energy and energy conservation energy for everything forms of energy

  1. kinetic energy

  2. magnetic energy

  3. mechanical energy

  4. solar energy

Show answer
Correct Option: B
Explanation:

The energy possessed by a magnet due to which it can attract iron filings, is called the magnetic energy.

The ionization energy of an electron present in the second Bohr's orbit of hydrogen is:

physics the essence of change forms of energy and energy conservation energy for everything forms of energy

  1. $54.4eV$

  2. $13.6eV$

  3. $1.5eV$

  4. $3.4eV$

Show answer
Correct Option: D
Explanation:

In the second orbit, $n=2$
$\therefore$ Ionisation energy $E=-\cfrac{13.6}{{(2)}^{2}}$
$=-\cfrac{13.6}{4}=3.4eV$

What is potential energy?

physics the essence of change forms of energy and energy conservation energy for everything forms of energy

  1. Energy of an abject due to its position or arrangement in a system

  2. Energy of an abject due to its nature or arrangement in a system

  3. Energy of an abject due to its shape or arrangement in a system

  4. None

Show answer
Correct Option: A
Explanation:

Energy of an abject due to its position or arrangement in a system is potential energy.