Physics Paper 2 Flashcards
(34 cards)
What does power mean?
The rate at which energy is transferred/ the rate at which work is done.
What does weight mean?
The force exerted on an object due to gravity
What does current mean?
The rate of flow of charge in a circuit
What does voltage mean? (Potential difference)
The measure of amount of energy which charge is carrying
What is the symbol of current and what is it measured in?
Symbol: I
Measured in : Amps (A)
What is the symbol in voltage and what is it measured in?
Symbol: V
Measured in : Volts (v)
What does resistance mean?
The property of a component which restricts the flow of charge
What is the symbol of resistance what what is it measured in?
Symbol : R
Measured in : Ohms ( Ω )
What is the symbol of charge and what is it measured in?
Symbol : Q
Measured in : coulombs (C)
What is the symbol of power and what is it measured in?
Symbol: P
Measured in : Watts (W)
What is the conservation of energy?
It cannot be created or destroyed, only transferred it stored usefully or dissipates into the surroundings
What is a series circuit?
An electrical circuit where components are connected one after another in a single loop
How does current flow in a series circuit?
It flows in a single path so it flows through every component. It is the same through each component.
How does voltage flow through a series circuit?
It is shared amongst components. If the resistance is equal within components then the voltage is shared equally.
How much current will you have if you have a bigger resistance
The smaller the current
What will the resistance be like if the wire was short in a circuit?
There would be low resistance as there would be less particles to collide with
What will the resistance be like if the wire was long in a circuit?
A higher resistance as there’s more particles to collide with
What would the resistance be like in a series circuit?
Total resistance can be calculated by adding the resistance of the resistors in the circuit.
What is a parallel circuit?
An electrical circuit where components are connected one after separate branches, which allows currents to flow through multiple independent paths
What is current like in a parallel circuit?
It gets split up between each branch. You can calculate total current by adding the current from each loop.
What is voltage like in a parallel circuit?
The voltage stays the same
What is resistance like in a parallel circuit?
If you add more resistors the total resistance decreases
What is current like in a parallel circuit?
Current is shared in each loop
What is voltage like on a parallel circuit?
each component has the same voltage
