8P3.5 Resistance yr8

8P3.5 Resistance yr8

By Caroline Andrew

​In the resistance of dough investigation...

•What was the independent variable (the thing that you changed)?

•What was the dependent variable (the thing that you measured)?

•What was an important control variable (something you should have kept the same)?

Subject | Subject

Some text here about the topic of discussion

Multiple Choice

What was the independent variable in the resistance of dough investigation?

• The resistance

• The length of the dough

• The thickness of the dough

Multiple Choice

What was the dependent variable in the resistance of dough investigation?

• The resistance

• The length of the dough

• The thickness of the dough

Multiple Choice

What was an important control variable in the resistance of dough investigation?

• The resistance

• The length of the dough

• The thickness of the dough

Open Ended

What is an electric current,?

Multiple Choice

What is the unit for measuring current?

• Volts, V

• Ohms, Ω

• Seconds ,s

• Amps, A

Open Ended

What do you need for an electric current to flow?

Open Ended

Name some materials with a low resistance

Open Ended

Name some materials with a high resistance

Poll

If the potential difference is constant, which circuit will have the greater current?

• Circuit with low resistance

• Circuit with high resistance

Poll

If the potential difference is constant and the resistance increases, what happens to current?

• Increases

• Decreases

• Stays the same

Poll

If you want to keep the same current when the resistance increases, what must happen to the potential difference?

• Increase

• Decreases

• Stay the same

Multiple Choice

Which of these is Ohm's law?

• Resistance = potential difference x current

• Current = Potential difference x resistance

• Potential difference = current x resistance

Multiple Choice

Which of these is Ohm's law? 

• V = I x R

• V = I ÷ R

• R = V x I

• I = V x R

Open Ended

A current of 3 A flows through a 6 Ω resistor.

Calculate the potential difference across the resistor.

Open Ended

A bulb with 50 Ω resistance has a 0.2A current flowing through it.

Calculate the potential difference across the bulb.

Open Ended

Calculate the resistance of a fan if a 6 V potential difference causes a 0.5 amp current to flow through it.