1.

A square plate of side length 4 cm is placed in a magnetic field of induction 20 mT in a direction making an angle 30^@ with the plane of coil then the magnetic flux linked with the coil is ?

Answer»

SOLUTION :Area `=(4 xx 10^(-2))xx(4xx10^(-2))`
`=16xx 10^(-4)m^2`
`theta=90-30=60^@`
`vecB=20XX 10^(-3)T`
`PHI =BA cos theta`
`=(20xx 10^(-3))(16 xx 10^(-4))xx1/2`
`=10xx10^(-3)xx16xx109^(-4)`
`=16xx 10^(-6)`
`=16 mu wb`


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