A fixed 14.8-cm-diameter wire coil is perpendicular to a magnetic field 0.41 T p

Question

A fixed 14.8-cm-diameter wire coil is perpendicular to a magnetic field 0.41 T pointing up. In 0.18 s , the field is changed to 0.24 T pointing down.

Part A

What is the average induced emf in the coil?

Express your answer to two significant figures and include the appropriate units.

A fixed 14.8-cm-diameter wire coil is perpendicular to a magnetic field 0.41 T pointing up. In 0.18 s , the field is changed to 0.24 T pointing down.

Part A

What is the average induced emf in the coil?

Express your answer to two significant figures and include the appropriate units.

Explanation / Answer

given diameter=14.8, radius r=7.4*10^-2=0.074m

Bi=0.41T,Bf=0.24T,t=0.18s

=BACos
=(*0.074²)*0.41Tcos0°=0.0070498024Wb
=BACos
=(*0.074²)0.24Tcos0°=0.0041267136Wb

Faradizzles Law =-N(/t)

=((0.0070498024Wb+0.0041267136Wb)/0.18secs) =0.062091V

which is about 62.091mV

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