Energy Transformations and Efficiency Quiz

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What type of graph is appropriate for a set of data?

Bar graph

Line graph (correct)

Pie chart

Curved graph

When calculating resistance using the slope of a line of best fit on a scatter graph, what does a steeper slope indicate?

Variable resistance

No resistance

Higher resistance (correct)

Lower resistance

What formula can be used to calculate energy efficiency when analyzing a bouncing ball?

$\frac{\text{Bounce height}}{\text{Drop height}} \times 100$

$\text{Drop height} - \text{Bounce height}$

$\frac{\text{Drop height}}{\text{Bounce height}} \times 100$ (correct)

$\frac{\text{Drop height}}{\text{Bounce height}}$

In the context of wind turbines, what is a common feature of valid experiments or fair tests regarding their operation?

Utilizing different blade designs Signup and view all the answers

When constructing parallel and series circuits, which type of circuit has the same current passing through each component?

Series circuit Signup and view all the answers

What is the difference between potential energy and kinetic energy?

Potential energy is stored energy waiting to be released, while kinetic energy is actively using energy for movement. Signup and view all the answers

What does the term 'P = V x I' represent in a circuit diagram?

The relationship between potential difference and current in a circuit Signup and view all the answers

How is electrical power (P) calculated in a circuit?

By multiplying voltage and current Signup and view all the answers

What does 'C' stand for in the acronym used to evaluate scientific evidence?

Currency Signup and view all the answers

In the context of energy transformations, what is meant by 'coherence'?

The logical progression of a discussion Signup and view all the answers

How can energy transformation be best illustrated?

Through sequences of energy transfers and transformations in a flowchart Signup and view all the answers

Which of the following represents the correct sequence of energy transformations for a coal-fired power station?

Chemical potential energy -> Thermal energy -> Kinetic energy -> Electrical energy Signup and view all the answers

What is the correct symbol used in a circuit diagram to represent a light bulb?

A rectangle with a wavy line inside Signup and view all the answers

To investigate Ohm's law quantitatively, which of the following measurements would you need to take?

Voltage and current Signup and view all the answers

If a machine has an energy output of 200 joules and an energy input of 500 joules, what is its energy efficiency as a percentage?

40% Signup and view all the answers

Which of the following is the most appropriate way to present data from an investigation of Ohm's law?

A scatter graph with a line of best fit Signup and view all the answers

In the context of energy transfers and transformations, what does the term 'energy transfer' refer to?

The movement of energy from one location to another Signup and view all the answers