Question

A copper wire of resistance R = 22 Ohm. is connected to a source of voltage that mcreases with time as DeltaV(t) = v_0(1 - e^-at), where V_0 = 130 V and a = 0.57 s^-1 Part (a) Enter an expression for the power dissipated in the wire in terms of V_0, a, R, and t. Expression : P = Select from the variables below to write your expression. Part (b) Calculate the energy dissipated by the resistor in joules during the first t = 1.85 s. Numeric : A numeric value is expected and not an expression. E =

Answer 1

Power dissipated in resistor,P= V²/R

where

P(t) = (V(1-e^-at))² / R

b)

t o a 2 2 whe rewe 12 23 N oe