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Physics
GCSE

What actually is current? Why does it differ from potential difference?

Current is defined as 'the flow of electric charge'. It can be broken down into very simple system of electrons, who carry charge, moving around a circuit. Potential difference can be thought of the force...

JO
Answered by James O. Physics tutor
5966 Views

Find the period of a wave given that it has a speed of 200m/s and a wavelength of 2m

The equation for finding the period of the wave is the reciprocal of the frequency 

hence th eperiod T =1/f

substitute this into the wave speed equation 

v=f x lambda

solve for...

ZJ
Answered by Zubaydah J. Physics tutor
2977 Views

Why are transformers used in the National Grid?

The National Grid is how electricity is distributed from suppliers to consumers (commercial or private household). Power stations produce power in the region of Mega Watts (the order of millions of watts)...

MR
Answered by Mike R. Physics tutor
17541 Views

What is a Sankey diagram and how do we use it?

A Sankey Diagram can be used to represent the energy usage and efficiency of anything. There are 3 main parts of  Sankey diagram, the start (left side), the arrow heads that peel off facing upwards or dow...

AW
Answered by Alex W. Physics tutor
9981 Views

Why protons held together in the nucleus?

Alike atoms, protons are also made of smaller particles - mesons. When protons are at very close distance mesons are bonded together by the Strong Nuclear Force, which is stronger than the Electric Force,...

ED
Answered by Eugeniu D. Physics tutor
4343 Views

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