Year 9 Electricity Quiz

Which of the following does not involve static charges?

(choose all that apply)

• Rubbing a balloon on human hair

• Friction of shoes on a carpet

• Charging an iPhone

• A series circuit

1. An object becomes positively charged when it:

2. 
   

• 1. Loses electrons

• 1. Gains electrons

• 1. Has more electrons than protons

• 1. Has an equal number of protons and electrons

1. What will happen when a charged balloon is brought close to a neutrally charged object?

   2. 
      

• 1. They will move away from each other

• 1. They will be unaffected by each other

• 1. They will move toward each other

• 1. They will move together, then apart

1. Which of the following explains why the charge on an atom is neutral?

• 1. An atom contains neutrons

• 1. An atom has protons and neutrons

• 1. An atom has equal numbers of protons and electrons

• 1. An atom has equal numbers of protons and neutrons

A material in which the electrons are bound tightly to the nucleus and are not free to move to a neighboring atom; plastic is a good __________________.

A material in which the electrons are free to travel to a neighbouring atom; metals are good _____________________.

____________________ is transferring an electric charge from one object to another by touching the objects together (direct contact). 

1. Which of the following is used to measure electric current

• 1. Ohmmeter

• 1. Energy meter

• 1. Ammeter

• 1. Voltmeter

 Which of the following describes electron flow in a circuit?

• 1. Conventional current

• 1. Current flowing from positive to negative

• 1. Flows from negative to positive in a circuit

• 1. Static charge in a circuit

 Which of the following is the total voltage of three 20V resistors in series?

• 20

• 40

• 60

• 80