1) Objects are charged through the transfer of..? a) Protons b) Neutrons c) Positrons d) Electrons 2) Which of the following is not an insulator? a) Wax b) Glass c) Iron d) Rubber 3) Why does a person's hair stand on end when they use a Van de Graaf generator? a) The hair repels from the generator b) Each hair is attracted to the other hairs c) The hair is attracted to the sky d) Each hair is repelled from other hairs 4) What charge do electrons have? a) Positive b) Negative c) Neutral d) They are not charged 5) What charge do protons have? a) Positive b) Negative c) Neutral d) They are not charged 6) Why do paint sprayers charge paint droplets? a) So they dry faster b) So they repel from each other c) So they attract to each other d) So they do not stick to the wrong thing 7) Which of these circuits will light up? a) A b) B c) C d) D 8) Which of these circuits would light a bulb the brightest? a) A b) B c) C d) D 9) Which of these is the circuit symbol for a Resistor? a) A b) B c) C d) D 10) The voltage across a resistor is 10V and the current is 2A. Calculate the resistance. a) 5 Ohms b) 4 Ohms c) 3 Ohms d) 2 Ohms 11) What is the potential difference across a 6 Ohm resistor when the current through it is 1.5A? a) 9V b) 4V c) 4.5V d) 7.5V 12) What colour is the live wire in a 3 pin plug? a) Brown b) Blue c) Green and Yellow d) Black 13) What colour is the earth wire in a 3 pin plug? a) Brown b) Blue c) Green and Yellow d) Black 14) The fuse is connected to which wire? a) All three b) Live c) Earth d) Neutral 15) When the current gets to high in a fuse wire what happens? a) It Blows b) It Melts c) It Wiggles d) It stops the current 16) Which of these is the symbol for double insulated? a) A b) B c) C d) D 17) What does AC stand for? a) Alternate Charge b) Alternate Current c) Alternating Charge d) Alternating Current 18) A Circuit breaker contains ... a) A magnet b) An electromagnet c) A switch d) Fuse wire 19) Why are metals better conductors than non-metals? a) They conduct well b) They have electrons c) They have free electrons d) They can be charged 20) What is ultrasound? a) Low frequency transverse waves? b) Low frequency longitudinal waves c) High frequency transverse waves? d) High frequency longitudinal waves

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