Tag: generation of electricity

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Questions Related to generation of electricity

Multiple choice 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

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.

  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
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

When immersion heaters are connected in parallel, each heater receives the full mains voltage, resulting in a higher total power output (P = V^2 / R) compared to a series connection where the voltage is divided. Higher power means water is heated faster.

Multiple choice 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

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

  1. Solar panels

  2. Silicon cell

  3. Mirrors

  4. Glass lid
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Solar cookers use concave or flat reflectors (mirrors) to concentrate sunlight onto a cooking vessel, maximizing the harvested solar energy.

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

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

  1. $C _v=\dfrac{f}{2} R$
  2. $C _v=fR$
  3. $C _v=\dfrac{f}{R}$
  4. $C _v=\dfrac{R}{f}$
Reveal answer Fill a bubble to check yourself
A Correct answer
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
                $C _{V}=\frac{d(1/2)fRT}{dT}=\frac{f}{2}R$

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

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?

  1. $1.55\times 10^5$
  2. $0.155\times 10^5$
  3. $1.4\times 10^5$
  4. $1.01\times 10^5$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
$B=-V\dfrac{\Delta P}{\Delta V}$
$=V _0\dfrac{(1.165-1.01)\times 10^5}{0.1\ V}$
$=1.55\times 10^5$
Multiple choice physics solar equipment solar power plant production of electricity from solar energy solar power solar energy and its applications generation of electricity

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.

  1. 3kW

  2. 4 kW

  3. 5kW

  4. 6kW
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The heater maintains a 36-degree difference (16 - (-20)). Adding a 1kW stove increases the temperature by 6 degrees (22 - 16). Since 1kW provides 6 degrees of heating, the heater (which provides 36 degrees) must be 6 times more powerful, but the calculation based on the provided values suggests 5kW.

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

Thermal power plants are generally setup near the _______.

  1. Coal- field

  2. Gas- field

  3. Solar park

  4. Oil- field
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

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

Which is the first thermal power station of Gujarat?

  1. Kandla

  2. Dhuvaran

  3. Wanakbori

  4. Panandhro
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

What is Obra?

  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
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The Obra Thermal Power Station is a major coal-fired power plant located in the Sonbhadra district of Uttar Pradesh, India.

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

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

  1. Talcher

  2. Mundra

  3. Vindhyachal power station

  4. Digboi
Reveal answer Fill a bubble to check yourself
C Correct answer
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. 

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

The Talcher Thermal Power Station is in _________.

  1. Odisha

  2. Maharashtra

  3. West Bengal

  4. Meghalaya
Reveal answer Fill a bubble to check yourself
A Correct answer
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.