Chapter no 6 Work and Energy exercise and Numerical in pdf

List the different forms of energy with examples. Describe the processes by which energy is converted from one form to another with reference to

1. fossil fuel energy
2. hydroelectric generation
3. solar energy
4. nuclear energy
5. geothermal energy
6. wind energy
7. biomass energy

State mass energy equation and solve problems using it. Describe the process of electricity generation by drawing a block diagram of the process from fossil fuel input to electricity output. List the environmental issues associated with power generation. Explain by drawing energy flow diagrams through steady state systems such as filament lamp, a power station, a vehicle travelling at’ a constant speed on a level road. Differentiate energy sources as non renewable and renewable energy sources with examples of each. Define efficiency of a working system and calculate the efficiency of an energy conversion using the formula:
efficiency = energy output converted into the required form / total energy input
explain why a system cannot have an efficiency of 100%. Define power and calculate power from the formula: Power = work done / time taken
Define the unit of power “watt” in SI and its conversion with horse power. Solve problems using mathematical relations learnt in this unit.

9th Class Physics Chapter 6 (Work and Energy) Short Question Answers

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9th Class Physics Chapter 6 (Work and Energy)Solved Numericals

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