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Describe one technique you could use to measure the threshold voltage for LEDs.

A sensitive ammeter is placed in series with LED. With the increase in Voltage, measure the potential difference value when it starts conducting. Black-out and shaded vision tube is used to observe the volta...
MP
Answered by Milan P. • Physics tutor
8513 Views

In still air an aircraft flies at 200 m/s . The aircraft is heading due north in still air when it flies into a steady wind of 50 m/s blowing from the west. Calculate the magnitude and direction of the resultant velocity?

Vector diagram showing an aircraft flying at 200 m/s north with a wind blowing at 50 m/s from west. Therefore the problem involves pythagoras theorem. So, the Magnitude of the resultant velocity is given by:...
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Answered by Milan P. • Physics tutor
16213 Views

How do I use quotes in my A Level English lit exam?

Quoting is very important in your English exam as the quotes are the evidence to the point you are making. There isn't a set 'required number' of quotes to use in an essay, but the usual rule is PEC (Point, ...
KW
Answered by Katie W. • English tutor
18543 Views

What factors cause the shifts and movements of the demand curve?

A movement along the demand curve is caused by a change in price only . If price decreases, quantity increases and demand is said to have extended or expanded. If price increases, quantity decreases and dema...
EG
Answered by Elliot G. • Economics tutor
31450 Views

What is GDP and is it a useful indicator to measure the standard of living?

1) GDP- is the value of all goods and services produced by the economy in a given period (year, quarter...)Quantity of goods x Price of goodsNominal GDP- measures values using current prices. (Prices of G&am...
MM
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