Practical 11 - Investigation of the force on a current in a magnetic field

Question 1

Which equation are we using for this practical?

Answer 1

F = BIlsintheta

Question 2

Method

Answer 2

Magnet places on balance and tare pressed
Current increased and reading of ammeter and balance taken for minimum 5 pairs of values
F = mg. The extra force from the wire pushes down on the balance.

Question 3

What causes the weight to increase on the balance?

Answer 3

The extra force is form the wire pushing down on the balance

Question 4

What do we plot on the axes and what gradient does this give us?

Answer 4

y-axis = F
x-axis = I
Gradient = Bl

Question 5

Describe the line given on the graph

Answer 5

Straight line

Question 6

What is l in the equation and how is it measured?

Answer 6

Length of magnets
With a ruler

Question 7

What are we trying to figure out in this practical?

Answer 7

B (magnetic field strength)

Question 8

What do we need to take into consideration with l?

Answer 8

To multiply where necessary if it’s coiled