A low-resistance transmitting cable is used to carry 725 kW of electricity from agenerating station. If the electricity voltage is 25 000 V, what magnitude of currentis flowing through the cable?A. 5.4 AB. 29 AC. 58 AD. 62 A
Question
A low-resistance transmitting cable is used to carry 725 kW of electricity from agenerating station. If the electricity voltage is 25 000 V, what magnitude of currentis flowing through the cable?A. 5.4 AB. 29 AC. 58 AD. 62 A
Solution
The magnitude of the current can be calculated using Ohm's law, which states that the current (I) is equal to the power (P) divided by the voltage (V).
In this case, the power (P) is 725 kW or 725,000 W and the voltage (V) is 25,000 V.
So, the current (I) can be calculated as follows:
I = P / V I = 725,000 W / 25,000 V I = 29 A
So, the magnitude of the current flowing through the cable is 29 A. Therefore, the correct answer is B. 29 A.
Similar Questions
Find the resistance of a conductor if the electric current flowing through it is 0.35 A when the potentialdifference across it is 1.4 V
power station generates 250kW of power at a potential difference of 25kV. Theenergy is transmitted through cables of total resistance 4.0Ω.What is the power loss in the cables?
A power cable having a resistance of 200Ω is used to deliver 2.0MW of power at 400kV from a power station to an industrial estate. Calculate the power wasted in the cable.*1 point2,500 W3,000 W5,000 W8,000 W
A transmission line cable consists of 26 strands of identical copper conductors, each 1.255 mm in diameter. The length of the cable is 10 km, but because of the twist of the strands, the actual length of each conductor is increased by 5%. If the resistivity of the copper is 1.72 x 10-8 Ω.m, what is the resistance of the cable in ohms?
A 100 W electric light bulb is connected to a 250 V supply. Determine (a) the current flowing in the bulb, and (b) the resistance of the bulb.
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.