Turn on thread page Beta
 You are Here: Home >< GCSEs

# What is the relationship between Voltage and Current? watch

Announcements
1. Ok so I'm revising electricity and when revising circuits i learned that I and V are directly proportional according to the equation V=IR and iv characteristics however i'm really confused because while revising the national grid i'm being told that voltage and current are inversely proportional, can someone explain this to me. BTW I'm studying triple science GCSE level
2. Well another equation is P=IV (P is power) which means that if the current increases, the voltage decreases and vice versa. That’s it basically it
Posted on the TSR App. Download from Apple or Google Play
3. (Original post by bluemuffin)
Well another equation is P=IV (P is power) which means that if the current increases, the voltage decreases and vice versa. That’s it basically it
So there aren't set laws for this?, idk why im so confused..
4. (Original post by misspessimism)
Ok so I'm revising electricity and when revising circuits i learned that I and V are directly proportional according to the equation V=IR and iv characteristics however i'm really confused because while revising the national grid i'm being told that voltage and current are inversely proportional, can someone explain this to me. BTW I'm studying triple science GCSE level
The first equation is ohm's law, which assumes that the resistance is constant. This is not the case for a lot of components because as temperature increases, due to the current flowing, the resistance increases and the voltage dropped increases while current decreases, hence, they are inversely proportional.

Turn on thread page Beta
TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: March 11, 2018
Today on TSR

### Uni league tables

Do they actually matter?

### University open days

• University of Warwick
Sat, 20 Oct '18
• University of Sheffield
Sat, 20 Oct '18
• Edge Hill University
Faculty of Health and Social Care Undergraduate
Sat, 20 Oct '18
Poll
Useful resources

## Study tools

### Essay expert

Learn to write like a pro with our ultimate essay guide.

See where you can apply with our uni match tool

### Ask a question

Chat to other GCSE students and get your study questions answered.

### Make study resources

Create all the resources you need to get the grades.

### Create your own Study Plan

Organise all your homework and exams so you never miss another deadline.

### Resources by subject

From flashcards to mind maps; there's everything you need for all of your GCSE subjects.

### Find past papers

100s of GCSE past papers for all your subjects at your fingertips.

## Help out other students

Can you help? Study help unanswered threads

## Groups associated with this forum:

View associated groups

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE