Question 145: Electromagnetic Induction

Question

A coil having $$n$$ turns and resistance $$R\Omega $$ is connected with a galvanometer of resistance $$4R\Omega .$$ This combination is moved in time $$t$$ seconds from a magnetic field $${W_1}$$ weber to $${W_2}$$ weber. The induced current in the circuit is

Accepted Answer

$${{\Delta \phi } \over {\Delta t}} = {{\left( {{W_2} - {W_1}} \right)} \over t}$$
$${R_{tot}} = \left( {R + 4R} \right)\Omega  = 5R\Omega $$
$$i = {{nd\phi } \over {{R_{tot}}dt}} = {{ - n\left( {{W_2} - {W_1}} \right)} \over {5Rt}}$$
( as $${W_2}\,\,\& \,\,{W_1}$$ are magnetic flux )

Answer

$${{\left( {{W_2} - {W_1}} \right)} \over {Rnt}}$$

Answer

$$ - {{n\left( {{W_2} - {W_1}} \right)} \over {5\,\,Rt}}$$

Answer

$$ - {{\left( {{W_2} - {W_1}} \right)} \over {5\,\,Rnt}}$$

Answer

$$ - {{n\left( {{W_2} - {W_1}} \right)} \over {Rt}}$$

Electromagnetic Induction

A coil having $n turns and resistance R\Omega is connected with a galvanometer of resistance 4R\Omega . This combination is moved in time t seconds from a magnetic field {W_1} weber to {W_2}$ weber. The induced current in the circuit is

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