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Physics-

General

Easy

Question

A magnetic field of $2 cross times 10 to the power of negative 2 end exponent T$ acts at right angles to a coil of area $100 blank c m to the power of 2 end exponent$ with 50 turns. The average emf induced in the coil is $0.1 blank V$ , when it is removed from the field in time $T$ . The value of $t$ is

$0.1 s e c$
$0.01 s e c$
$1 s e c$
$20 s e c$

The correct answer is: $0.1 blank s e c$

$e equals negative fraction numerator N open parentheses B subscript 2 end subscript minus B subscript 1 end subscript close parentheses A cos invisible function application theta over denominator capital delta t end fraction$
$rightwards double arrow 0.1 equals fraction numerator negative 50 cross times left parenthesis 0 minus 2 cross times 10 to the power of negative 2 end exponent right parenthesis cross times 100 cross times 10 to the power of negative 4 end exponent cross times cos invisible function application 0 degree over denominator t end fraction$
$rightwards double arrow t equals 0.1 blank s e c$

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For previous objective, which of the following graphs is correct

For previous objective, which of the following graphs is correct

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Which of the following is correct?

Which of the following is correct?

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