- Trending Categories
- Data Structure
- Operating System
- MS Excel
- C Programming
- Social Studies
- Fashion Studies
- Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
A change in the physical state can be brought about
(a) only when energy is given to the system
(b) only when energy is taken out from the system
(c) when energy is either given to or taken out from the system
(d) without any energy change
Correct Answer: (c) when energy is either given to or taken out from the system
Explanation: A change in the physical state can be brought about when energy is either given to or taken out from the system.
- Related Articles
- Give one example of a physical change in which energy is given out, and one example of physical change in which energy is absorbed?
- Which of the following energy change involves frictional force? (a) chemical energy to heat energy(b) kinetic energy to heat energy(c) potential energy to sound energy (d) chemical energy to kinetic energy
- A microphone converts:(a) electrical energy into sound energy in ordinary telephone(b) microwave energy into sound energy in a mobile phone(c) sound energy into mechanical energy in a stereo system(d) sound energy into electrical energy in public address system
- In photosynthesis process, solar energy is converted into which energy?(a) Carbohydrate energy(b) Growth energy(c) Chemical energy(d) Physical energy
- Mechanical energy of a body includes (a) kinetic energy only(b) potential energy only(c) kinetic energy and potential energy(d) none of these
- In an ecosystem, the ten percent energy available for transfer from one trophic level to the next is in the form of :(a) heat energy (b) chemical energy(c) mechanical energy (d) light energy
- Energy Stored in a Magnetic System
- The energy possessed by an oscillating pendulum of a clock is: (a) kinetic energy(b) potential energy(c) restoring energy(d) mechanical energy
- A flying airplane possesses:(a)Only potential energy(b) Only kinetic energy(c) Both potential and kinetic energy(d) None of these
- When an arrow is shot from its bow, it has kinetic energy. From where does it get the kinetic energy?
- Most of the sources of energy we use represent stored solar energy. Which of the following is not ultimately derived from the Sun’s energy?$(a)$ geothermal energy$(b)$ wind energy$(c)$ nuclear energy$(d)$ bio-mass.
- Fill in the following blanks with suitable words:(a) Power is the rate of doing .....................(b) 1 watt is a rate of working of one ................. per ..............(c) The electricity meter installed in our home measures electric energy in the units of ................(d) The principle of ..................... of energy says that energy can be...............from one form to another, but it cannot be....................or..................(e) When a ball is thrown upwards,............... energy is transformed into.................energy.
- Reactions in which energy is given out are known as _________________.
- (a) What is geothermal energy?(b) What is the source of heat contained in geothermal energy?(c) Explain how, geothermal energy is used to generate electricity.(d) State two advantages of geothermal energy.(e) State two disadvantages of geothermal energy.
- A ball is dropped from a height of 10 m:a. Its potential energy increases and kinetic energy decreases during the fallsb. Its potential energy is equal to the kinetic energy during the fall.c. The potential energy decreases and the kinetic energy increases during the fall.d. The potential energy is zero and kinetic energy is maximum while it is falling.