# GCSE physics ocr potential dividers

GCSE physics revision of potential dividers

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• Created by: harry
• Created on: 02-04-13 12:30
What is a potential divider?
It is a pair of resistors that divide the potential (voltage) in a circuit
1 of 5
How is the voltage across a potential divider shared out?
According to the relative resistances of the resistors
2 of 5
So if the top resistor had 70% of the resistance, what % of the voltage would it have?
70%
3 of 5
What is the equation for a potential divider?
Voltage out= Voltage in x (R2/(R1xR2)
4 of 5
So in a circuit, the voltage in is 9V, R1 is 20 ohms and R2 is 40 ohms. What is the output voltage?
6V
5 of 5

## Other cards in this set

### Card 2

#### Front

How is the voltage across a potential divider shared out?

#### Back

According to the relative resistances of the resistors

### Card 3

#### Front

So if the top resistor had 70% of the resistance, what % of the voltage would it have?

### Card 4

#### Front

What is the equation for a potential divider?

### Card 5

#### Front

So in a circuit, the voltage in is 9V, R1 is 20 ohms and R2 is 40 ohms. What is the output voltage?