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Draw the circuit that could be used to investigate how the current through a filament lamp affects its resistance. How could it be used to investigate this? (6 marks)

*Circuit diagram showing a battery, filament lamp, ammeter and variable resistor connected in series, with a voltmeter connected in parallel with the filament lamp.*The resistance of the variable resistor sh...
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Answered by Oliver B. • Physics tutor
14952 Views

The maximum speed this cyclist can travel on a level road is 14 m/s. How does cycling uphill affect the maximum speed of this cyclist? Explain your answer.

Maximum speed is lower This is because maximum power output of cyclist is constant but additional work is done against gravityGravitational potential energy of the cyclist is increasedPower in = total energy...
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Answered by Stella C. • Physics tutor
14791 Views

A reflex occurs the iris of the human eye in response to changes in light levels - describe how these changes occur, referring to the changes in light level in your answer.

I would most likely present a figure of a dilated & undilated pupal and hopefully this will begin their thought process. To receive full marks for this answer, I will be looking for the below points:• pu...
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Answered by Brandon S. • Physics tutor
2627 Views

What is red-shift and how does it work?

When we see light, the colour of light that we see is determined by the wavelength of the light. Violet light has the shortest wavelength, and red light has the longest wavelength. Red shift happens when we ...
TD
2651 Views

Explain the difference between a longitudinal and transverse wave.

Imagine we have a wave that is travelling from left to right. This is the wave's direction of motion, or what is sometimes called the direction of "energy propagation". In a transverse wave the par...
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Answered by Ross G. • Physics tutor
6982 Views