*Physics Self Assessment* *Test*
Attend all the questions:
Total marks: 15
1. Fill in the blanks:
______ is the speed in a given direction.
2. Differentiate between Renewable sources and non renewable sources.
3. It is better to use CFL bulbs than to use tube lights.
4. How are fossil fuels formed ?
5. Name the following:
a) Capacity to do work
b) The space with no matter
6. Define the terms:
a)One joule
b)Energy chain
7. Explain the relation between work and energy.
8. Briefly explain electrical energy.
Answers
Answer:
1.velocity
2.Renewable resources can be replenished by natural processes as quickly as humans use them. Examples include sunlight and wind.
whereas
Nonrenewable resources are natural resources that exist in fixed amounts and can be used up. Examples include fossil fuels such as petroleum, coal, and natural gas.
3.When an electric bulb produces light, it also gives heat that leads to the wastage of energy or electricity . So, to minimise this wastage CFLs (Compact Fluorescent Lamps) are used nowadays.
That's why It is better to use CFL bulbs than to use tube lights.
4.Fossil fuels are formed when organic matter that has been buried deep within the earth are subject to heat and pressure over millions of years.
5.a.Energy is defined as the capacity to do work.
b. Outer space is the space with no matter.
6.a.Joule, unit of work or energy in the International System of Units (SI).
it is equal to the work done by a force of one newton acting through one metre.
1 joule is equivalent to 1 watt-second, 10 7 ergs, 0.2390 calories, or 0.738 foot-poundSymbol: J.
b.The energy chain concept is defined as energy paths from source to energy. Consumption to final end-use energy benefit in terms of heating, cooling, lighting and other benefits of energy.
7.There is a strong connection between work and energy, in a sense that when there is a net force doing work on an object, the object's kinetic energy will change by an amount equal to the work done.
8.Electrical energy is energy derived from electric potential energy or kinetic energy. When used loosely, electrical energy refers to energy that has been converted from electric potential energy. This energy is supplied by the combination of electric current and electric potential that is delivered by an electrical circuit.
Answer:
1.velocity
2.Renewable resources can be replenished by natural processes as quickly as humans use them. Examples include sunlight and wind.
whereas
Nonrenewable resources are natural resources that exist in fixed amounts and can be used up. Examples include fossil fuels such as petroleum, coal, and natural gas.
3.When an electric bulb produces light, it also gives heat that leads to the wastage of energy or electricity . So, to minimise this wastage CFLs (Compact Fluorescent Lamps) are used nowadays.
That's why It is better to use CFL bulbs than to use tube lights.
4.Fossil fuels are formed when organic matter that has been buried deep within the earth are subject to heat and pressure over millions of years.
5.a.Energy is defined as the capacity to do work.
b. Outer space is the space with no matter.
6.a.Joule, unit of work or energy in the International System of Units (SI).
it is equal to the work done by a force of one newton acting through one metre.
1 joule is equivalent to 1 watt-second, 10 7 ergs, 0.2390 calories, or 0.738 foot-poundSymbol: J.
b.The energy chain concept is defined as energy paths from source to energy. Consumption to final end-use energy benefit in terms of heating, cooling, lighting and other benefits of energy.
7.There is a strong connection between work and energy, in a sense that when there is a net force doing work on an object, the object's kinetic energy will change by an amount equal to the work done.
8.Electrical energy is energy derived from electric potential energy or kinetic energy. When used loosely, electrical energy refers to energy that has been converted from electric potential energy. This energy is supplied by the combination of electric current and electric potential that is delivered by an electrical circuit.
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