Tag: physics

Questions Related to physics

On a microscopic scale, all forms of energy may be studied as

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

  1. potential

  2. kinetic

  3. potential or kinetic

  4. nuclear

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Correct Option: C
Explanation:

On microscopic level all energies are either Kinetic or potential as they are either created due to motion or particle interaction.

Raindrops fall on earth with certain kinetic energy on the earth. From where do they get this energy ?

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

  1. Chemical energy

  2. Gravitational Potential energy

  3. Energy between molecules of water

  4. Heat energy

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Correct Option: B

Water stored in a dam primarily possesses

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

  1. Heat energy

  2. Electrical energy

  3. Kinetic energy

  4. Potential energy

Show answer
Correct Option: D
Explanation:

Answer is D.

Potential energy is the energy that is stored in an object due to its position relative to some zero position. An object possesses gravitational potential energy if it is positioned at a height above (or below) the zero height.
There is potential energy stored in a water reservoir behind a dam. It is converted to kinetic energy when the water starts flowing down the penstock, from the dam. This kinetic energy is used to turn a turbine.
Hence, the water stored in a dam possesses potential energy.

The form of energy that wood can be categorized into is:

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

  1. chemical energy

  2. electrical energy

  3. potential energy

  4. muscular energy

Show answer
Correct Option: A
Explanation:

You'd burn it, just like you might burn coal or oil or natural gas. The stored energy in the wood is chemical energy, meaning that it can be released by a chemical reaction (burning). It's closely related to those fossil fuel energies, because the chemical energy was formed by photosynthesis, using energy from sunlight as the input.

An atom bomb converts __________ into heat and sound energy.

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

  1. electrical energy

  2. heat energy

  3. mechanical energy

  4. atomic energy

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Correct Option: D
Explanation:

An atomic bomb contains atomic energy which is converted to heat and sound energy.

From the following statements find the one that is NOT correct:

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

  1. A flying bird has both potential and kinetic energy.

  2. A ball rolling on the ground has kinetic energy but no mechanical energy.

  3. A stretched rubber band has potential energy

  4. Chemical energy can be converted into electrical energy

Show answer
Correct Option: B
Explanation:

A body having either. Kinetic' energy or Potential energy or both is said to be having Mechanical energy.

A wound spring has:

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

  1. chemical energy

  2. magnetic energy

  3. mechanical energy

  4. muscular energy

Show answer
Correct Option: C
Explanation:

A wound spring has mechanical energy.

The form of energy that water stored in a dam primarily has is :

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

  1. muscular energy

  2. kinetic energy

  3. potential energy

  4. magnetic energy

Show answer
Correct Option: C
Explanation:

the water in dam is stored is standing still, it isn't moving. 

Thus, it has potential energy.

Which of the following quantity is different from others ?

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

  1. Work

  2. Kinetic energy

  3. Force

  4. Potential energy

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Correct Option: C
Explanation:

Force has a unit of newton while K.E ,work and potential energy occurs due to some applied force,and their unit is joule.

The flowing water of a river possesses ...... energy.

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

  1. gravitational

  2. potential

  3. electrical

  4. kinetic

Show answer
Correct Option: D
Explanation:

Water, like many substances, contains two kinds of energy. The first kind of energy is called kinetic energy. This is energy that is used during the execution of processes, such as movement. Because of kinetic energy water can flow and waves can exist.
But water can also contain potential energy. This is energy that is stored in the water. Stored, but not used. This energy can become useful when water starts to flow. It will be transferred to kinetic energy and this will cause movement.
so it is clear that flowing water have kinetic energy .

so best possible answer is option D.