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Explain what happens in terms of current induced as a magnet enters a solenoid in a closed circuit, and as it leaves.

This is an application to Faraday's and Lenz' laws of electromagnetic induction. So as the magnet moves into the coil, the magnetic field from the magnet moves through the coil, therefore there is a change i...
DL
Answered by Danruh L. • Physics tutor
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How can I centre-align an item horizontally within another element?

To centre-align an element using CSS, we will make the margins either side of the element of equal width. First, ensure that the elements width is set to less than 100%.width: 80%; This is important as other...
DS
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How does Shakespeare present the theme of guilt in Macbeth?

[Point 1] In 'Macbeth', one of the ways in which guilt is presented is through the reoccurring image of blood . In Act 2 Scene 2, the blood on Macbeth’s hands after his murder of Duncan is both literal and a...
ST
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Find the equation of the tangent line to the curve y = 2x^2 - 4x + 3 at the point (3,9)

To find the equation of the tangent line to the curve y = 2x 2 - 4x + 3, we have to differentiate. Taking each part of the equation separately, we can calculate dy/dx = 4x - 4. By differentiating the equatio...
Answered by • Maths tutor
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y = 1/x^2, differentiate y (taken from AQA 2018 past paper)

y = 1/x^2 is the same asy = x^-2 , now we can use the standard differentiation formula nx^n-1 to gety = -2x^-3y = -2/x^3
Answered by • Maths tutor
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