Answer
Verified
428.1k+ views
Hint The energy losses in transmission are ohmic power losses associated with the current flowing through the circuit and the resistance of the wires in the transmission line. Lower current in the wires implies lower power losses and vice versa. Higher voltages will require more insulation and hence increase costs.
Complete step by step answer
Transformers are devices that can increase or decrease current or voltage that is being transmitted through the transmission lines in the form of alternating current.
To reduce costs in the transmission lines, we require the minimum amount of energy losses in the transmission lines. So ideally we can increase the voltage of the power lines $ (V) $ and since the power transmitted in the lines remain constant, from the relation $ P = VI $ , the current $ (I) $ transmitted in the cables will decrease and hence the ohmic energy losses due to the resistance of the cables will decrease and we will save energy which is mentioned in option (A) and (D).
However, transmitting higher voltage through the power lines requires more insulation on the power lines and increases the costs once again. So, to minimize energy losses and costs, we need to decide an optimal amount of voltage and current to be transmitted in the lines.
To convert the alternating current to have a specific amount of voltage and current in the transmission lines, we must use transformers to step-up or step-down the current or voltage.
From the above discussion, we can conclude that option (A) and option (D) are correct.
Note
We can also rule out option (B) since transformers are not needed to conserve electrical energy as there will always be energy losses associated with actual transformers as well as power transmission lines and we can never completely conserve electrical energy. Similarly, we can also rule out option (C) since the transmission speed of the current in the power lines is constant and travels near the speed of light and it is independent of the voltage or current in the power lines, which is controlled by transformers.
Complete step by step answer
Transformers are devices that can increase or decrease current or voltage that is being transmitted through the transmission lines in the form of alternating current.
To reduce costs in the transmission lines, we require the minimum amount of energy losses in the transmission lines. So ideally we can increase the voltage of the power lines $ (V) $ and since the power transmitted in the lines remain constant, from the relation $ P = VI $ , the current $ (I) $ transmitted in the cables will decrease and hence the ohmic energy losses due to the resistance of the cables will decrease and we will save energy which is mentioned in option (A) and (D).
However, transmitting higher voltage through the power lines requires more insulation on the power lines and increases the costs once again. So, to minimize energy losses and costs, we need to decide an optimal amount of voltage and current to be transmitted in the lines.
To convert the alternating current to have a specific amount of voltage and current in the transmission lines, we must use transformers to step-up or step-down the current or voltage.
From the above discussion, we can conclude that option (A) and option (D) are correct.
Note
We can also rule out option (B) since transformers are not needed to conserve electrical energy as there will always be energy losses associated with actual transformers as well as power transmission lines and we can never completely conserve electrical energy. Similarly, we can also rule out option (C) since the transmission speed of the current in the power lines is constant and travels near the speed of light and it is independent of the voltage or current in the power lines, which is controlled by transformers.
Recently Updated Pages
How many sigma and pi bonds are present in HCequiv class 11 chemistry CBSE
Mark and label the given geoinformation on the outline class 11 social science CBSE
When people say No pun intended what does that mea class 8 english CBSE
Name the states which share their boundary with Indias class 9 social science CBSE
Give an account of the Northern Plains of India class 9 social science CBSE
Change the following sentences into negative and interrogative class 10 english CBSE
Trending doubts
Difference Between Plant Cell and Animal Cell
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
Which are the Top 10 Largest Countries of the World?
Give 10 examples for herbs , shrubs , climbers , creepers
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
How do you graph the function fx 4x class 9 maths CBSE
Differentiate between homogeneous and heterogeneous class 12 chemistry CBSE
The Equation xxx + 2 is Satisfied when x is Equal to Class 10 Maths
Change the following sentences into negative and interrogative class 10 english CBSE