Flashcards
Experiments and other
Flashcards do conjunto (16)
- 1What are random errors?Errors in measurement caused by by factors that vary from one another
- 2What are Systematic errors?They cause each reading to be different to the true value by the same amount
- 3What is a parallax error?Parallax is a displacement or difference in the apparent position of an object viewed along two different lines of sight
- 4What is absolute uncertainty?Is the uncertainty of a measurement, given as a fixed value
- 5What is fractional uncertainty?Uncertainty given as a fraction
Uncertainty/value - 6Percentage uncertaintyFractional uncertainty * 100
- 7Uncertainties on a graphYou can draw the best and worst line of best fit from the range of uncertainties.
Then work out the difference between the gradients, this is your uncertainty - 8Three types of dataDiscrete data
Continuous data
Categoric data - 9How demonstrate stationary waves using microwavesYou can find nodes and antinodes by moving the prode between the transmitter and metal plate
- 10How demonstrate stationary waves using soundWhen playing a loudspeaker into a glass tube, the lycopodium power (laid on the bottom of tube) is shaken away from the antinodes, but left undisturbed at the nodes
- 11How to investigate factors affecting resonant frequencies of a string1) Measure mass and length of string to find mass per unit length
2) Work out tension using mg
3) Turn on the frequency generator until you find the first harmonic - 12Different factorsLength
Tension
Type of string - 13Young's double slit experiment1) Use a coherent and monoromatic source
2) Shine a laser through the slits
3) The slits have to be about the same size as the wavelength to diffract - 14Young's modulus experiment1) Measure the cross-sectional area of wire
2) Add weights in intervals and measure the extension
3)Use all the values to calculate the stress and strain - 15How to reduce uncertainty in the young's modulus experiment?Make the wire long and thin so that extends more for the same force
- 16Experiment to find the resistivity of a wire?1) Record length and diameter of wire, voltmeter reading, and ammeter reading
2) Use readings to work out resistance
3) Repeat using different lengths
4) Plot resistance against length
5) Gradient * Area = resistivity
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- AS - Level Physics (Experiments and other) FlashCards sobre Experiments and other, criado por sebi2899 em 20-05-2016.
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- sebi2899
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