Tag: generation of electricity

Questions Related to generation of electricity

Two identical immersion heaters are to be used to heat water, in a large container. Which one of the following arrangement would heat the water faster :
Give reasons for your answer.

physics solar equipment production of electricity from solar energy solar power alternate sources of energy solar power plant solar energy and its applications renewable and non-renewable resources renewable and non-renewable sources of energy generation of electricity

  1. Connecting the heaters in series with the main supply,

  2. Connecting the heaters in parallel with the main supply,

  3. Connecting the heaters in series and parallel with the main supply,

  4. None of the above

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Correct Option: A

Which of the following is used in solar cooker to harvest the solar energy?

physics solar equipment production of electricity from solar energy solar power alternate sources of energy solar power plant solar energy and its applications renewable and non-renewable resources renewable and non-renewable sources of energy generation of electricity

  1. Solar panels

  2. Silicon cell

  3. Mirrors

  4. Glass lid

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Correct Option: B

Relation between constant volume specific heat $(C _v)$ and degree of freedom $(f)$ for a gas is ($R$ is gas constant) 

physics solar equipment solar power plant production of electricity from solar energy solar power solar energy and its applications generation of electricity

  1. $C _v=\dfrac{f}{2} R$

  2. $C _v=fR$

  3. $C _v=\dfrac{f}{R}$

  4. $C _v=\dfrac{R}{f}$

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Correct Option: A
Explanation:

The internal energy of 1 mole of an ideal gas at temperature $T$ , having $f$ degrees of freedom is given by ,

          $U=N _{A}\times(1/2)fk _{B}T=(1/2)fRT$  ......................eq1
where $N _{A}=$Avogadro's number
           $k _{B}=$ Boltzmann's constant
from first law of thermodynamics ,
           $dU=dQ-dW$  ............eq2
At constant volume , $dV=0$ 
hence  $dW=PdV=0$
eq2 becomes , $dU=dQ$
but       $dQ=C _{V}dT$  (for 1 mole of gas)
therefore $dU=C _{V}dT$
or            $C _{V}=dU/dT$
putting the value of $U$ in this equation, we get
                $C _{V}=\frac{d(1/2)fRT}{dT}=\frac{f}{2}R$

Temperature of a gas is $20^o$C and pressure is changed from $1.01\times 10^5$ Pa to $1.165\times 10^5$ Pa. If volume is decreased isothermally by $10\%$. Bulk modulus of gas is?

physics solar equipment solar power plant production of electricity from solar energy solar power solar energy and its applications generation of electricity

  1. $1.55\times 10^5$

  2. $0.155\times 10^5$

  3. $1.4\times 10^5$

  4. $1.01\times 10^5$

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Correct Option: A
Explanation:
$B=-V\dfrac{\Delta P}{\Delta V}$
$=V _0\dfrac{(1.165-1.01)\times 10^5}{0.1\ V}$
$=1.55\times 10^5$

The room heater can maintain only ${16^0}C$ in the room when the temperature outside is -${20^0}C$. It is not warm and comfortable, that is why the electric stove with power of 1 kw is also plugged in.Together these two devices maintain the room temperature of ${22^0}C$. Determine the thermal  power of the heater.

physics solar equipment solar power plant production of electricity from solar energy solar power solar energy and its applications generation of electricity

  1. 3kW

  2. 4 kW

  3. 5kW

  4. 6kW

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Correct Option: C

Thermal power plants are generally setup near the _______.

geography irrigation and power solar power plant generation of electricity production of electricity from solar energy exploration and conservation of minerals secondary sector : industry

  1. Coal- field

  2. Gas- field

  3. Solar park

  4. Oil- field

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Correct Option: A
Explanation:

Thermal power plants required coal and oil, which they burn to generate the required power. Since transmission of electricity is more efficient than transporting coal or oil over the same distance,  So thermal power plants are generally located near coal fields.

Which is the first thermal power station of Gujarat?

geography irrigation and power solar power plant generation of electricity production of electricity from solar energy exploration and conservation of minerals secondary sector : industry

  1. Kandla

  2. Dhuvaran

  3. Wanakbori

  4. Panandhro

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Correct Option: B
Explanation:

Dhuvaran Thermal Power Station is an Oil and Gas power plant located at Khambhat in Anand district, Gujarat. The power plant is under ownership of state owned Gujarat state Electricity limited.This was the first power plant of Gujarat Electricity Board, the parent company of Gujarat State Electricity Corporation Limited.

What is Obra?

geography irrigation and power solar power plant generation of electricity production of electricity from solar energy exploration and conservation of minerals secondary sector : industry

  1. Copper project in Rajasthan

  2. Super thermal power project in Uttar Pradesh

  3. Atomic power plant at Kalpakkam

  4. Hydroelectric project in Uttar Pradesh

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Correct Option: B

At present which is the biggest thermal power plant in India?

geography irrigation and power solar power plant generation of electricity production of electricity from solar energy exploration and conservation of minerals secondary sector : industry

  1. Talcher

  2. Mundra

  3. Vindhyachal power station

  4. Digboi

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Correct Option: C
Explanation:

The largest Thermal power plant to the date in India is Vindhyachal Super Thermal Power Plant (VSTPP). It has an installed capacity of 4760MW with 6 units of 210 MW and 7 units of 500MW. 

The Talcher Thermal Power Station is in _________.

geography irrigation and power solar power plant generation of electricity production of electricity from solar energy exploration and conservation of minerals secondary sector : industry

  1. Odisha

  2. Maharashtra

  3. West Bengal

  4. Meghalaya

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Correct Option: A
Explanation:

Talcher Thermal Power station is located in Talcher sub-division of Angul district in the Indian state of Odisha. The power plant is one of the Coal based plants of NTPC. The coal for the power plant is sourced from Jagannath Mines of Mahanadi Coalfields Limited.