KGR Kilbreda CollegeYear 10 Science 2010

Name:______

Electrical Practical Test

  1. Set one multimeter as an ammeter.
  1. Set the other multimeter as a voltmeter.
  1. Construct a series circuit using two globes.
  1. What do you predict the voltage will be over each globe in your series circuit?
  1. Prove it using the multimeter.
  1. What do you predict the current will do in your circuit?
  1. Now construct a parallel circuit.
  1. What do you predict the voltage will be over each globe in your parallel circuit?
  1. Prove it using the multimeter.
  1. What do you predict the current will do in your circuit?
  1. Tell me how you would measure current in this circuit using the multimeter.

/11 = %

Renewable Energy Theory Test/66 = %

Question 1.

(10 marks)

Complete the following sentences using the key terms in the box below.

An ______is a closed path that contains a source of electricalenergy connected to one or more load components.

When there is a complete connection, electrons will move around the circuit. This flow of electrons is called an electric ______.

Voltage is measured using a ______, in units called ______.

When current flows through a circuit, electrical energy is changed to otherforms of energy. Current can be measured using an ______and in units called ______.

______is a measure of how difficult it is for current to flow. This is measured

in units called ______.

In a ______there is only one path for the current to flow along.

In a ______the current flows along two or more branches of acircuit.

amps voltmeter ohms series circuit volts

current ammeter parallel circuit resistance electrical circuit

Question 2.

In the diagram above, A, B and C are identical globes. Is the current flowing through globe A the same as the current flowing through globe B? (1 mark)

Is the current flowing through globe A the same as globe C? (1 mark)

Explain your answer. (2 marks)

Question 3. (3 marks)

Are the globes in the following circuit diagramsconnected in series or in parallel?

. ______

Question 4. (3 marks)

Heidi wants to test whether EverexcellentBatteries last as long as SupersensationalBatteries. She buys one 12 V battery of eachbrand and connects each one into a circuit withsix globes. She connects the EverexcellentBattery in series with six globes and theSupersensational Battery in parallel with six globes. She switches them on at the sametime and times how long it is before the globesstop glowing in both circuits. Is this a faircomparison? Why or why not?

Question 5.

Nishika sets up the circuit below, using a 12 V power source and three identical globes. She measures thecurrent at A to be 5 mA (milliamps).

(a)Predict what you think the current readingwould be at B and C. (2 marks)

(b)Knowing that Nishika used a 12 V power supply,estimate how much voltage would be usedacross each globe. (2 marks)

(c)If you actually measured this, you may find adifferent result. How could you explain this?

(2 marks)

Question 6. (3 marks)

Draw the circuit symbols for the following components:

  • an ammeter
  • a switch
  • a variable power supply

Question 7. (4 marks)

Hannah is standing on the first floor balcony outside the Science Rooms at Kilbreda overlooking the Atrium. She drops a basketball over the balcony and watches its motion. The basketball hits an empty table in the Atrium and then bounces off onto the floor where it makes a few more bounces, then rolls slowly to a stop. Describe the energy transformations involved.

Question 8.(3 marks)

Draw a Sankey diagram to represent the energy changes in Question 7.

Question 9.(2 marks)

In our study of energy this term we have discussed useful and useless energy. What do these two terms mean?

Question 10.(10 marks)

Give explanationsof the following, (using a diagram and / or giving examples may make this easier):

a)Greenhouse Effect

b)Greenhouse gases

c)Enhanced Greenhouse Effect

d)Biofuel

e)Renewable energy

Question 11.(8 marks)

Choose a renewable energy resource.

a)Explain why this resource is called “renewable”, contrasting it for example with traditional fossil fuels.

b)Describe, using diagrams as needed the science behind how this source works to produce useable energy.

c)Discuss whether this energy source could be a major contributor to Australia’s energy needs.

d)Explain whether or not you are an enthusiastic advocate of this energy source and why. What are the main advantages and disadvantages?

Question 12.(10 marks)

Below is a news release from the Australian Government in September 2009 as reported by the “Live In Australia” website :

Australia is in the middle of a population boom that promises to fuel economic growth for years to come. Figures this week showed population growth topped 2 percent in the year to March, the fastest pace on record and the highest of any advanced economy. Up to 60 percent more Australians are predicted in the next forty years, in sharp contrast to countries like Japan and Germany where populations are shrinking.

“While Europe and Japan are stagnating, Australia is moving ahead,” said James Craig, chief economist at CommSec. “More people translates to increased spending and demand for homes, and as a result, increased momentum for our economy.”

The Australian government now estimates Australia’s population will jump to 35 million by 2049 from the current 21.9 million and compared with a previous forecast of 28 million.

This release predicts substantial growth in Australia’s population and economy. Linked to the areas we have been studying in this unit of work, what other considerations should be taken into account with such a significant population increase as this predicted? Write a response in approximately 200 words.

Energy test 2010.docx20/04/2010