Energy

A battery charger passes a current of 2.0 A through a cell over a period of 2.5 hours. 

How much charge is transfered to the cell?

Q = I x t = 2.0 x (2.5 x 60 x 60) = 18,000 C

The greater th resistance across a component, the smaller the current that flows through it.

Charge (C) = Current (A) x Time (s)

Q = I x t

Electric current is the flow of electric charge round the circuit. Current will only flow around a complete circuit if there's a potential difference

For some components, as the current through them is changed, the resistance of the component changes as well.

Potential difference (V) = current (A) x resistance (I)

V = I x R

An LDR is a resistor that is dependent on the intensity of light. In bright light, the resistance falls.

What is current measured in? Amperes

Electrical potential difference also means which of these answers? Voltage

What are the units of power?  Watts

In which type of circuit is current conserved Parallel

Which of these is true in a series circuit? The current across each component is the same

What type of current flows from batteries? DC current

F = ke                 p = mv

V = IR                 P = IV

Q =It                   E = QV

How do you calculate momentum? p = mv

What are the units of momentum?  kg m/s

If an object with a mass of 12 kilograms is moving at 10 metres per second, what is its momentum? 120 kg m/s. 

What is the symbol for a bulb in a circuit? A circle with a cross in it

What are the two types of circuit? Circuit and Parallel

What does LED stand for? Light Emitting Diode