Practicals

Question 1

What would be the variables for the frequency of a stationary waves experiment?

Answer 1

Change the length of the vibrating string

Measure the vibration of the first harmonic

Question 2

What would be plotted on the graph for the frequency of a stationary wave graph using the equation f=1/2l x r(T/μ)

Answer 2

f on the y axis
1/2l on the x axis
r(T/μ) is the gradient

Question 3

What would be the variables for using a double slit for diffraction experiment?

Answer 3

Change the distance between the screen and double slit
Measure the spacing between maxima
Keep the slit seperation constant

Question 4

What you be plotted on the graph for finding the wavelength of laser light experiment graph using the equation w=λD/s

Answer 4

w on the y axis
D on the x axis
λ/s is the gradient

Question 5

What would the variables be for the resistivity of a wire experiment?

Answer 5

Change the length of wire

Measure the potential difference, current and diameter of wire

Question 6

What you plot on a graph in the determining the resistivity of a wire experiment using the equation R=ρL/A?

Answer 6

R on the y axis (V/I)
L on the x axis
ρ/A is the gradient

Question 7

What is the set up for a circuit to measure internal resistance?

Answer 7

A cell, ammeter and variable resistor all in series with a voltmeter in parallel with the cell

Question 8

What are the variables in the experiment to measure the internal resistance and emf of a cell?

Answer 8

Chance the current (by changing the resistance of the variable resistor)
Measure the potential difference

Question 9

What would you plot on a graph for finding the internal resistance and emf of a cell experiment using the equation V=ε-Ir?

Answer 9

V on the y axis
I on the x axis
ε is the y intercept
-r is the gradient

Question 10

What are the variables in the experiment to measure g from freefall?

Answer 10

Record the distance between the light gates

Measure(electronically) the time taken for the ball bearing to fall

Question 11

What would you plot on a graph for the g from freefall experiment using the equation s=ut+½at^2

Answer 11

t^2 on the y axis
s on the x axis
2/a is the gradient

Question 12

What are the variables in the experiment for measuring the youngs modulus of a wire?

Answer 12

Change the weight attached to the wire

Measure the extension, diameter and original length of the wire

Question 13

What would you plot on a graph for the youngs modulus of a wire experiment using the equation ε=(f/A)/(∆L/L)

Answer 13

∆L on the y axis
F on the x axis
L/εA is the gradient