Electricity Revision Sheet

Name\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ **[Term 3 & ELECTRICITY REVISION SHEET]** Q1 (a) Describe what is necessary for a current to flow through a wire. \(b) What is Kirchhoff's first law? (Kirchov's law) Q2 Draw the magnetic field lines about a bar magnet Q3 Draw a diag...

Name\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ **[Term 3 & ELECTRICITY REVISION SHEET]** Q1 (a) Describe what is necessary for a current to flow through a wire. \(b) What is Kirchhoff's first law? (Kirchov's law) Q2 Draw the magnetic field lines about a bar magnet Q3 Draw a diagram of (a) two globes being connected in series? \(b) two globes being connected in Parallel? Q4 (a) Give an example of when a series circuit would be used. \(b) Give an example of when a parallel circuit would be used. \(c) Discuss the difference in the brightness of the globes \(d) Compare what happens when one globe is blown in each of the two circuits \(e) Which circuit drains the battery quicker? Explain how Q5 This question requires calculations.Show ALL WORKING OUT ! FIND (a) the voltage across a battery if the current is 3A and the resistance is 12Ω \(b) the resistance through a circuit if the current is 1.6amps and the voltage is 7.2 volts Q6 Explain what the purpose of a fuse is? Q7 What is static electricity? How does this happen with a Van Der Graf? Q8 What is meant by the Doppler effect? Give an example of this. Q9 Explain how an electric motor works. Q10 Explain how an electromagnet works.