A power station transmits electricity to a remote town using a step-up transformer with a turns ratio of 1:100. The transmission lines have a total resistance of 5.0 $\Omega$. If the power station outputs 100 kW at 240 V, what is the power loss in the transmission lines?
2.0 W
5.0 W
200 W
5000 W
Marking your answer...
This may take a few seconds
Sign up for free to see your full marking breakdown and personalised study recommendations.
Create Free Account Log inThis is a free VCE Units 3 & 4 Physics practice question worth 1 mark, testing your understanding of Power transmission. It falls under How are fields used in electricity generation? in Unit 3: How do fields explain motion and electricity?. Submit your answer above to receive instant AI-powered marking and personalised feedback.
In this unit students use Newton’s laws to investigate motion in one and two dimensions. They explore the concept of the field as a model used by physicists to explain observations of motion of objects not in apparent contact. Students compare and contrast three fundamental fields – gravitational, magnetic and electric – and how they relate to one another. They consider the importance of the field to the motion of particles within the field. Students examine the production of electricity and its delivery to homes. They explore fields in relation to the transmission of electricity over large distances and in the design and operation of particle accelerators. A student-designed practical investigation involving the generation of primary data and including one continuous, independent variable related to fields, motion or light is undertaken either in Unit 3 or Unit 4, or across both Units 3 and 4, and is assessed in Unit 4, Outcome 2. The design, analysis and findings of the investigation are presented in a scientific poster format.
In this area of study, students use empirical evidence and models of electric, magnetic and electromagnetic effects to explain how electricity is produced and delivered to homes. They explore the transformer as critical to the performance of electrical distribution systems in minimising power loss.
Analyse the supply of power by considering transmission losses across transmission lines: P = I²R, and using transformers to reduce current and hence reduce losses.
All free, all instant AI marking.
A newly constructed residential area requires a consistent power supply of 20 MW. The local power plant generates electricity at 12 kV and i…
A wind farm located 50 km from a city generates 100 MW of power at 12 kV. The transmission lines connecting the wind farm to the city's dist…
State two reasons why electrical power is transmitted at high voltage rather than at low voltage.
Which of the following statements best describes the primary reason for using high-voltage transmission lines in the electricity grid?
A power transmission line carries electricity from a power plant to a substation. To minimize power loss during transmission, what is the pr…
A regional town is supplied with power from a distant power station. The power station generates electricity at 20 kV. Before transmission,…
StudyPulse has thousands of VCE Physics questions with full AI feedback, mark breakdowns, progress tracking, and study notes across every Key Knowledge point including Power transmission.
