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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...

MP
Answered by Milan P. Physics tutor
7004 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 Mag...

MP
Answered by Milan P. Physics tutor
14502 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 usua...

KW
Answered by Katie W. English tutor
15794 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 decrea...

EG
Answered by Elliot G. Economics tutor
28131 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...

MM
3070 Views

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