The magnetic flux (in weber) through a stationary rectangular coil of 200 turns…

PHYSICS · Multi-part · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

The magnetic flux

\Phi

(in weber) through a stationary rectangular coil of 200 turns varies with time

t

(in millisecond) as follows:

\Phi = 0

t = 0\,\text{ms}

\Phi

increases linearly to

0.20\,\text{Wb}

t = 4\,\text{ms}

\Phi

remains constant at

0.20\,\text{Wb}

until

t = 6\,\text{ms}

\Phi

then decreases linearly to

-0.10\,\text{Wb}

t = 11\,\text{ms}

. (a) Calculate the magnitude of the induced emf in the coil during the interval

0

–

4\,\text{ms}

. (b) Find the average induced emf during the entire interval

0

–

11\,\text{ms}

. (c) Draw the induced emf versus time graph for

0

–

11\,\text{ms}

, labelling all key values clearly.