Year 10 Science Revision
5.3.3 ELECTRICAL ENERGY
a) Design, construct and draw circuits containing a number of components- (globe, closed switch, open switch, ammeter, voltmeter, battery or transformer)
What is electricity?
A form of energy resulting from the existence of charged particles either statically as an accumulation of charge or dynamically as a current.
What is a conductor?
Materials that permit electrons to flow freely from atom to atom and molecule to molecule. An object made of conducting material will charge to be transferred across the entire surface of the object. Metals like silver, gold and aluminium are good insulators as it ‘conducts’ the electron current or flow of electrons fairly easily.
What is an insulator?
Insulators have the opposite effect on the flow of electrons; they do not let electrons flow very easily from one atom to another. Insulators are materials whose atoms have tightly bound electrons. Some common insulators are glass, plastic, rubber, air and wood.
What is voltage?
Voltage is a specific measure of potential energy that is always relative between two points.
What is resistance?
Resistance is a term that describes the forces that oppose the flow of electron current in a conductor.
What is a current?
The continuous movement of free electrons through the conductors of a circuit.
What does Ohm’s law state?
Ohm’s law states that the current through a conductor between two points is directly proportional to the potential difference or voltage across the two points, and inversely proportional to the resistance between them.
What will happen to a circuit if the voltage is increased?
If the voltage is increased, the current must also increase R = V/I
What will happen if the resistance is increased?
If the resistance is increased, the current will decrease.
What is a way of increasing the resistance in a circuit?
Advantages and disadvantages of parallel circuits?
If one bulb was to break, the others would continue to work, and the
a) Design, construct and draw circuits containing a number of components- (globe, closed switch, open switch, ammeter, voltmeter, battery or transformer)
What is electricity?
A form of energy resulting from the existence of charged particles either statically as an accumulation of charge or dynamically as a current.
What is a conductor?
Materials that permit electrons to flow freely from atom to atom and molecule to molecule. An object made of conducting material will charge to be transferred across the entire surface of the object. Metals like silver, gold and aluminium are good insulators as it ‘conducts’ the electron current or flow of electrons fairly easily.
What is an insulator?
Insulators have the opposite effect on the flow of electrons; they do not let electrons flow very easily from one atom to another. Insulators are materials whose atoms have tightly bound electrons. Some common insulators are glass, plastic, rubber, air and wood.
What is voltage?
Voltage is a specific measure of potential energy that is always relative between two points.
What is resistance?
Resistance is a term that describes the forces that oppose the flow of electron current in a conductor.
What is a current?
The continuous movement of free electrons through the conductors of a circuit.
What does Ohm’s law state?
Ohm’s law states that the current through a conductor between two points is directly proportional to the potential difference or voltage across the two points, and inversely proportional to the resistance between them.
What will happen to a circuit if the voltage is increased?
If the voltage is increased, the current must also increase R = V/I
What will happen if the resistance is increased?
If the resistance is increased, the current will decrease.
What is a way of increasing the resistance in a circuit?
Advantages and disadvantages of parallel circuits?
If one bulb was to break, the others would continue to work, and the