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Physics
End of Year Assessment
Question | Answer |
---|---|
If you INCREASE the voltage, ________ current will flow | More |
If you INCREASE the resistance, _______ current will flow | Less |
What does the ammeter do? | Measures the current |
What is current measured in? | Amps |
The ammeter must be placed in series/parallel in a circuit | In series |
What does a voltmeter measure | Voltage |
What is voltage measured in? | Volts |
What equation links current, voltage and resistance? | Voltage = current x resistance (V = IR) |
What equation links time, velocity and speed? | V = s/t |
What equation links acceleration, time taken and change in velocity? | Acceleration = change in velocity/time taken |
What is the formula for wave speed? | Wave speed = frequency x wavelength |
What is the formula for acceleration (more complicated one)? | 2as = v2 - u2 |
On a velocity/time graph, distance travelled is shown by what? | The area under the curve |
What is the formula for frequency? | F = 1/T |
What is the formula for the speed of a wave? | V = frequency x wavelength |
When a wave travels into a more dense medium, what happens to the frequency? | It stays the same |
Materials through which light travels more slowly, have a __________ refractive index | Higher |
What medium has the lowest refractive index? | A vacuum |
What is the equation used to find the refractive index of a material? | Refractive index = speed of light in vacuum/speed of light in material |
What is the formula for refractive index using Snell’s Law? | Refractive index = sin (angle of incidence)/sin (angle of refraction) |