P5 Quiz

What is an electrostatic force?

How do charges behave?

How are electrons held in place? How can friction affect this?

Why does lightning occur?

What makes a good conductor? Give an example of a good and bad conductor.

What is an electric current?

Why is charge conserved but energy used up in a circuit?

What is the purpose of the power supply?

What does a voltmeter measured?

Complete the statement: In an electric circuit charge is 1 and energy 2.

What is potential difference? What is one volt in terms of this?

What is a variable resistor?

Use an equation to describe the relationship, voltage and current?

What is Ohm's law?

Describe a series circuit. Include information about current, voltage and resistance. What happens if you double the number of cells?

What is a series circuit? Include information about the current and voltage.

What is a thermistor and a LDR?

What symbol is used for a thermistor?

What symbol is used for a LDR?

What happens to the resistance of metals as the temperature increases? Why?

In practice how do LDRs and thermistors work?

What is a magnetic field?

What happens when there is relative movement between a coil of wire and a magnet?

How can the current and voltage be increased during electromagnetic induction?

How is visualising a magnetic field using magnetic field lines helpful?

What is an alternating current and why is it produced?

What is the magnetic effect of a current?

What is the motor effect?

Explain why the motor effect works.

What is a split ring communicator? How is it used in a motor?

What is inside a transformer?

What is a step up transformer?

What is a step down transformer?

How does electricity flow from the primary coil to the secondary coil when they are not connected?

What is the relationship between voltage in the primary and secondary coils and the number of coils?

What is d.c.?

Why is an alternating current good?

Why is electricity transferred at high voltage?

What is the equation for electrical power?