An LR circuit consists of a 35-mH inductor, ac resistance of 12 ohms, an 18-V battery, and a switch. What is the current 5.0 ms after the switch is closed

 I = 1.23 A

Explanation:

In an RL circuit current passing is described by

           I = E / R (1 - )

Let's reduce the magnitudes to the SI system

        L = 35 mH = 35 10⁻³ H

        t = 5.0 ms = 5.0 10⁻³ s

let's calculate

         I = 18/12 (1 - e (- 5 10-3 12/35 10-3))

         I = 1.5 (1- )

         I = 1.23 A

this would be about 43%

according to jean piaget, in what stage of cognitive development are children able to understand conservation task?

b. preoperational

just took it