Solar energy is treated as the energy source of the future. Write any two solar devices working on solar energy that can be utilised in daily life. Enable Ginger Cannot connect to Ginger Check your internet connection or reload the browser Disable in this text field Rephrase Rephrase current sentence Edit in Ginger ×

Solar energy is a renewable energy and is considered as the future energy source as it do not produce any pollution and is easily available. It is the base of all other energy sources. There are many devices which are being used in our daily lives such as solar cells which are now being increasingly used in cars, houses, etc. They convert solar energy directly to electrical energy. Another device which works on solar energy is solar cooker which is used to heat the food materials. In this case, the solar energy is converted to heat energy.

Match the suitable renewable and non-renewable resources. Sources A B C Renewable Coal Wind Petroleum Non-renewable Hydrogen Natural gas Solar energy

Renewable sources: Wind, solar energy, hydrogen. A renewable resource, also known as a flow source, is a natural resource which will replenish to replace the portion depleted by usage and consumption, either through natural reproduction or other recurring processes in a finite amount of time in a human time scale. Non-renewable: Coal, petroleum, natural gas. A non-renewable resource (also called finite resource) is a natural resource that cannot be readily replaced by natural means at a pace quick enough to keep up with consumption. An example is carbon-based fossil fuels.

Give the significance of the following in the domestic circuit? Electric meter Earthing.

Electric meter: This device helps to keep track of the amount of electricity consumed by a household. Electrical utilities use electrical meters installed at the premises of the customers to measure the electrical energy supplied to their customers for billing. Typically, they are calibrated in billing units, the most common being the kilowatt-hour. Earthing: The function of the earth wire is to prevent electric shock by directing the leakage current along the path of the least resistance to earth. One end of the earth wire is connected to metallic casing of appliances and other one is connected to the ground.

MEDIUM

Earn 100

What do you do to save electricity?

Important Questions on Electricity and Circuits

MEDIUM

Science>Physics>Electricity and Circuits>Methods to Conserve Electricity

Consider the following statements and choose the correct alternative.

Statement - $I$ : Heating capacity of biogas is more than that of biomass.

Statement - $II$ : Biogas produces lesser pollution as compared to biomass.

EASY

Science>Physics>Electricity and Circuits>Methods to Conserve Electricity

Solar energy is treated as the energy source of the future. Write any two solar devices working on solar energy that can be utilised in daily life.

MEDIUM

Science>Physics>Electricity and Circuits>Methods to Conserve Electricity

Give an example of non-conventional energy with the help of which electricity can be generated.

HARD

Science>Physics>Electricity and Circuits>Methods to Conserve Electricity

The solar constant at a place is

1.4 kw / m^{2}

. The solar energy received by an area of

4 m^{2}

per second at this place is:

MEDIUM

Science>Physics>Electricity and Circuits>Methods to Conserve Electricity

Match the suitable renewable and non-renewable resources.

Sources	A	B	C
Renewable	Coal	Wind	Petroleum
Non-renewable	Hydrogen	Natural gas	Solar energy

MEDIUM

Science>Physics>Electricity and Circuits>Methods to Conserve Electricity

Explain the working of a solar water heater with the help of a labelled diagram.

MEDIUM

Science>Physics>Electricity and Circuits>Methods to Conserve Electricity

List any three advantages and disadvantages of solar energy.

EASY

Science>Physics>Electricity and Circuits>Methods to Conserve Electricity

What is the use of

watt - hour

meter in a household circuit?

MEDIUM

Science>Physics>Electricity and Circuits>Methods to Conserve Electricity

Name the major constituent of biogas. Write the properties of biogas which make it a good fuel.

MEDIUM

Science>Physics>Electricity and Circuits>Methods to Conserve Electricity

Name the two devices that work using heat energy of the sun.

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Science>Physics>Electricity and Circuits>Methods to Conserve Electricity

Correct statement, if it is wrong.

India is called the 'country of winds'.

MEDIUM

Science>Physics>Electricity and Circuits>Methods to Conserve Electricity

What is energy management?

HARD

Science>Physics>Electricity and Circuits>Methods to Conserve Electricity

Is it during the summer or the monsoon season that load-shedding is normally implemented in Kerala? Why?

MEDIUM

Science>Physics>Electricity and Circuits>Methods to Conserve Electricity

Incandescent bulbs are designed keeping in mind that the resistance of their filament increases with the increase in temperature. If at the room temperature

100 W

60 W

and

40 W

bulbs have filament resistances

R_{100}

R_{60}

and

R_{40}

respectively, then the relation between these resistances is

MEDIUM

Science>Physics>Electricity and Circuits>Methods to Conserve Electricity

In India, electricity is supplied for domestic use at $220 V$ . It is supplied at $110 V$ in USA. If the resistance of a $60 W$ bulb for use in India is $R$ , the resistance of a $60 W$ bulb for use in USA will be

EASY

Science>Physics>Electricity and Circuits>Methods to Conserve Electricity

Two bulbs

25 W, 220 V

and

100 W, 220 V

are given. Which one has higher resistance?

HARD

Science>Physics>Electricity and Circuits>Methods to Conserve Electricity

Two electric bulbs rated

25 W

220 V

and

100 W

220 V

are connected in series across a

220 V

voltage source. The

25 W

and

100 W

bulbs now draw

P_{1}

and

P_{2}

powers. Find

P_{1}

and

P_{2}

MEDIUM

Science>Physics>Electricity and Circuits>Methods to Conserve Electricity

Give the significance of the following in the domestic circuit?

Electric meter
Earthing.

EASY

Science>Physics>Electricity and Circuits>Methods to Conserve Electricity

Which one among the following is the correct order of power consumption for light of equal intensity ?

EASY

Science>Physics>Electricity and Circuits>Methods to Conserve Electricity

Three bulbs with power rating of

40 W, 60 W

and

100 W

220 V

are connected in series to a

220 V

mains. Energy consumption will be

What do you do to save electricity?

Important Questions on Electricity and Circuits

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