Tag: forms of energy and energy conservation

Questions Related to forms of energy and energy conservation

Muscular energy is form of chemical energy. 

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

  1. True

  2. False

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Correct Option: A

What energy does the person possess while climbing a hill?

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

  1. Potential Energy

  2. Kinetic Energy

  3. Only muscular energy

  4. Both (A) and (B)

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Correct Option: D
Explanation:

Both potential energy (due to going up against the force of gravity) and kinetic energy (because of movement of the body).

A fish swimming in water possess mechanical energy.

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

  1. True

  2. False

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Correct Option: A

Energy stored in the bonds of molecules is a form of:

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

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Correct Option: C
Explanation:

The Energy that gets released when the bonds are formed was stored in the electromagnetic fields inside of the atom. When the bond is formed, the electrons and protons assume a configuration that has an, overall, less intense combination of electric and magnetic fields inside of the bonded atoms than when they were separate. 

A body $A$ is placed on a railway platform and an identical body $B$ in a moving train. Which of the following energies of $B$ are greater than those of $A$ as seen from the ground?

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

  1. Kinetic

  2. Total

  3. Mechanical

  4. Internal

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Correct Option: A,B,C
Explanation:

Since the body B is in a moving train, it will have higher kinetic energy as compared to the body on platfrom. It is because the speed of the body $A$ is zero.

The total energy of the body $B$ will be more than body $A$ due to its state of motion and the mechanical energy of the body $B$ will be higher due to more amount of work done on it as it is moving.

The internal energy of the two identical bodies do not depend on other external factors and it remains constant for the bodies.

So, only the internal energy will not change.

The moving striker of the carom board will possess------ energy

physics work, energy and power forms of energy and energy conservation energy for everything forms of energy

  1. Kinetic

  2. Potential

  3. Solar

  4. Electric

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Correct Option: A
Explanation:

as the striker is moving it will possess kinetic enegry

Geothermal energy is feasible in regions that

physics work, energy and power forms of energy and energy conservation energy for everything forms of energy

  1. Are near the sea

  2. Have thermal plants

  3. Have coal mines

  4. Are over hot spots in the crust

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Correct Option: D

A charged parallel plate capacitor of distance ($d$) has ${U} _{0}$ energy. A slab of dielectric constant ($K$) and thickness ($d$) is then introduced between the plates of the capacitor. The new energy of the system is given by:

physics energy transformations and energy transfers forms of energy and energy conservation energy for everything forms of energy

  1. $K{U} _{0}$

  2. ${K}^{2}{U} _{0}$

  3. $\cfrac{{U} _{0}}{K}$

  4. $\cfrac{{U} _{0}}{{K}^{2}}$

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Correct Option: B

 person trying to lose weight by burning fat lifts a mass of $10kg$ upto a height of $0.5\, m\, with\, in\, 1000$ times. Assume that the potential energy lost each time he lowers the mass is dissipated. How much fat will he use up considering the work done only when the weight is lifted up? Fat supplies $3.8 \times 10^7 J$ of energy per kg which is converted to mechanical energy with a $20 \%$ efficiency rate. 

physics energy transformations and energy transfers forms of energy and energy conservation energy for everything forms of energy

  1. $6.45 \times {10^{ - 3}}kg$

  2. $9.89 \times {10^{ - 3}}kg$

  3. $12.89 \times {10^{ - 3}}kg$

  4. $2.45 \times {10^{ - 3}}kg$

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Correct Option: A

When water falls from a height, the energy changes from,

physics energy transformations and energy transfers forms of energy and energy conservation energy for everything forms of energy

  1. kinetic to potential

  2. potential to kinetic

  3. chemical to mechanical

  4. Mechanical to chemical

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Correct Option: B
Explanation:

Potential  to kinetic energy