Topic 11

• The removal of excess charge by providing a low resistance path for electrons to flow through.

  Earthing
• Lines representing an electric field, that point in the direction in which a positive charge would experience an electric force. The close they are, the strongest the field.

  Electric Field Lines
• A region in which a change will experience a non-contact, electric force. All charged objects have one around them, and it is stronger the closer your are to the charge.

  Electric Field
• A consequence of static charge building up in the cloud. Strikes are caused by the discharge of this charge.

  Lightning
• When two charges of the same polarity meet, they will repel.

  Like Charges
• The electric field between two charged plates is uniform. The field lines are parallel, equally spaced and point from the positive plate to the negative plate.

  Parallel Plates
• The electric field around a point change becomes weaker the further away you are. The field lines for a positive charge point radially outwards, whereas the field lines for a negative charge point radially inwards.

  Point Charge
• The transfer of electrons between two surfaces that have an imbalance of charges. It can be particularly dangerous in locations such as petrol pumps, so the pumps must be earthed.

  Sparking
• The charge caused by an imbalance of positive and negative charges in, or on, an object‘s surface. It is often caused by electrons being rubbed from one surface onto another.

  Static Charge
• When two charges of opposite polarities meet, they will attract.

  Unlike Charges