Question

1. To get the wire loop to spin we will strip [x amount] of the copper off at least one or both wires.

all

none half ≈

2. To get the wire loop to spin we will strip [see question 1] of the copper off both ends of the wire to increase the [y] experienced by the motor.

magnetic field

cross sectional area

torque current

3. How fast the motor spins is related to the amount of force acting on it; which factors effect magnetic force? (Can be more than one answer)

Current Area of wire loop

Number of loops of wire

Thickness of wire

Mass of wire loop

4. After gently tapping the motor it continues to "lock" into place, (without changing our materials and/or equipment) what practical factors can we change in the experiment to overcome this problem? Hint: think of what variables are constant/fixed and which we have control over. (Can be more than one answer)

magnetic field of the magnet

number of wire loops

current

wire thickness

Answer 1

1 )

To get the wire loop to spin we will strip HALF of the copper off at least one or both wires.

2 )

To get the wire loop to spin we will strip HALF of the copper off both ends of the wire to increase the

[TORQUE] experienced by the motor.

3 )

the factors affect the force is current (i), no of loops (N) and also the area of cross section (A)

since the relation is

= N i A B sin

= r x F

4 )

here

the practical factors are that can change in the experiment to overcome this problem is current and

no of loops.