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When an RL circuit is connected to a battery, what happens to the current in the circuit?
O It is initially at its maximum value and then decreases linearly with time.
O It is initially at its maximum value and then decreases exponentially with time.
O It is initially 0 and then increases exponentially with time.
O It is constant during the charging.
O It is initially 0 and then increases linearly with time.

Respuesta :

Answer:It is initially 0 and then increases exponentially with time

Explanation:

When battery is connected to RL circuit

Current varies according to

[tex]i=i_0\left [ 1-e^{\frac{tR}{L}}\right ][/tex]

where [tex]i_0 =maximum\ Current[/tex]

t=time

R=Resistance

L=Inductance

and Potential difference across Resistor is given by

[tex]v=v_0\left [ 1-e^{\frac{tR}{L}}\right ][/tex]

where [tex]v_0=maximum\ voltage[/tex]

At t=0 i=0 and as time increase value of increases exponentially

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