What is the voltage across the resistor at the moment the switch is closed?
Initially, the switch is open. What is the voltage across the resistor and the capacitor at the moment the switch is closed? The voltage across the resistor is equal to the terminal voltage of the battery, and the voltage across the capacitor is zero. You just studied 19 terms!
What happens to current after switch is closed?
A switch has two states Open or closed When a switch is open no current can flow through it. When a switch is closed current flows through it.
What happens to inductor when switch is opened?
There is a constant magnetic field in the inductor, and no back emf. However, when the switch is opened again, The current drops to zero very rapidly. The magnetic field collapses rapidly.
What happens to voltage in a closed circuit?
His voltage law states that for a closed loop series path the algebraic sum of all the voltages around any closed loop in a circuit is equal to zero. This is because a circuit loop is a closed conducting path so no energy is lost.
How to determine the voltage across the inductor?
Determine the voltage across the inductor immediately after the switch is closed. 12 V. The inductor opposes any change in current in the circuit. Without the inductor, the resistor would immediately change its current to its maximum value.
What happens to the voltage when the switch is closed?
Extra credit: if the switch is closed for a long time, the voltage accross the inductor is 0. Hence no current is flowing through the 3kOhm resistor, and the current flowing through the inductor is 5/2k = 2.5mA. The switch is opened: the current flowing through the inductor is still 2.5mA.
Is the current in an inductor zero just after closing the switch?
This is derived by finding the differential equation in terms of current by using KVL. Is this true that the current in the circuit consisting of an inductor, a capacitor and a resistor (all in series) is zero too at the time just after closing the switch?
How to determine the current in a resistor after it has been closed?
Determine the current in the resistor after the switch has been closed for a long time. After a long time, the current through the resistor has become steady, so the inductor has no effect. Ohm’s law gives a current of . Write an equation for the voltage across the resistor as a function of time t after the switch is closed.