Tag: energy for everything

Questions Related to energy for everything

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

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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. $3.4eV$

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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

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Correct Option: A
Explanation:

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

Potential energy is classified into which two energy?

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

  1. Gravitational and Elastic Potential Energy

  2. Kinetic and Elastic Potential Energy

  3. Mechanical and Elastic Potential Energy

  4. None

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Correct Option: A
Explanation:

Gravitational and Elastic Potential Energy are two types of potential energy

Gravitational potential energy: Energy stored in the object at a certain height above ground.
Elastic potential energy:Energy stored in streched or compressed spring.

Mechanical energy is the form of which two energies:

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

  1. Potential and Kinetic

  2. Thermal and Nuclear

  3. Potential and Sound

  4. Light and Sound

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Correct Option: A
Explanation:

Mechanical energy comprises of Potential and Kinetic energy.

Which one of the following is NOT a form of energy?

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

  1. Mechanical energy

  2. Nuclear Energy

  3. Thermal Energy

  4. Leap Energy

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Correct Option: D
Explanation:

Leap energy is not any kind of energy

Identify, which of the following energies can be positive only:

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

  1. Kinetic energy

  2. Potential energy

  3. Mechanical energy

  4. Both kinetic and mechanical energies.

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Correct Option: A
Explanation:

Potential energy is the energy stored by the virtue of the position of a body.While,kinetic energy is the energy possessed by the virtue of motion.
Hence, K.E is always +ve .
When a body is raised to a particular height,work is done against the force of gravity and P.E is $ - $ve.
When the body is falling freely the work is done in the direction of force of gravity and P.E is $+$ ve.

Identify, which of the following energies can be positive only

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

  1. kinetic energy

  2. potential energy

  3. mechanical energy

  4. both kinetic and mechanical energies

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Correct Option: A
Explanation:

Only kinetic energy can have positive value. Potential energy has negative value and mechanical energy is combination of these two hence can either be positive or negative.

What kind of energy transformation takes place

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

  1. When an arrow is shot its bow

  2. running water

  3. Moving plane

  4. A stretched spring

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Correct Option: A
Explanation:

The kind of energy transformation takes place

When an arrow is short its bow