The document discusses electromagnetic forces and alternating current. It explains that a force will act on a current-carrying conductor in a magnetic field using the equation F = BIL sin(theta). It defines magnetic flux density in teslas and discusses how to determine the direction of force on a charge moving in a magnetic field. It also introduces terms related to alternating current such as period, frequency, peak value, and root-mean-square value, and notes that mean power in a resistive load is half the maximum power for sinusoidal alternating current.

2. Show an appreciation that a force might act on
a current-carrying conductor placed in a
magnetic field.
Recall and solve problems using the equation F
= BIL sin(theta), with the directions as
interpreted by Fleming’s left-hand rule.
Define magnetic flux density and the tesla.
Predict the direction of the force on a charge
moving in a magnetic field.

3. Show an understanding and use the terms period,
frequency, peak value and root-mean-square value as
applied to an alternating current or voltage
Deduce that the mean power in a resistive load is half the
maximum power for a sinusoidal alternating current.
Distinguish between r.m.s. and peak values and recall and
solve problems using the relationship Irms = Io /
sqrt(2) for the sinusoidal case.

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