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What's the difference between Potential Difference and Electromotive Force

Although both are measured in volts, there is a subtle difference in their respective definition. Electromotive Force is the transfer of chemical energy in a battery (multiple single cells) into electrical e...
JJ
Answered by Joseph J. • Physics tutor
4831 Views

Why does Lenz's law have a minus sign?

The minus sign shows that the direction of induced current always opposes the change that created it. So when certain metals are cropped through say a copper tube they slow down. Show video of Lenz's law in ...
JJ
Answered by Joseph J. • Physics tutor
2538 Views

What is the difference between the cubism and fauvism movement in art?

Despite sharing a time period and many aspects of style, the two movements have many prominent differences. The subjects share a common subject matter: both are still life , featuring fruits and other common...
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Answered by Isabelle B. • Art tutor
18833 Views

How do you write a worthwhile plan under exam pressure?

Possibly the most crucial element to writing a good history essay is a plan. However, this is not always easy under exam conditions and the temptation to dive straight into writing your answer is always ther...
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Answered by Georgia H. • History tutor
2560 Views

The velocity, v, of a moving body at time t is given by v = 50 - 10t. A) Find its acceleration. B) The initial displacement, s, is 40 meters. Find an expression for s in terms of t.

A) To find acceleration from a velocity equation, we must differentiate velocity, v = 50 - 10t.This gives us dv/dt = -10 = accelerationB) To find displacement from velocity, we must integrate the velocity eq...
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Answered by Alex S. • Maths tutor
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