Table of Contents
- 1 What happens to the current if the switch is closed?
- 2 Why does current increase when a switch is closed?
- 3 What will the ammeter reads when the switch is closed?
- 4 When the current flowing through a circuit is switched off then?
- 5 What happens to the voltmeter and ammeter readings when switch S is closed?
- 6 What happens to the current when a switch is closed?
- 7 What is the effect of time constant on induced voltage?
What happens to the current if the switch is closed?
It is known that the switch is the device used to control the flow of the current in the circuit. If the switch is open, the current does not flow and if the switch is closed, then the current flows through the circuit components.
Why does current increase when a switch is closed?
What happens to the reading on the ammeter when the switch is closed? When the switch is closed, resistors R1 and R2 are in parallel, so that the total circuit resistance is smaller than when the switch was open. As a result, the current increases.
Does current flow when the switch is off?
In a circuit a cell is connected along with a switch which provides constant current in the circuit. So when the switch is turned off the current flow does not happen because the charges are not moving.
Why does voltage decrease when switch is closed?
This is due to the gap in between the switch. So the applied energy is not converted to current even though the resistance is still there. Hence voltage will be there, where you applied it.
What will the ammeter reads when the switch is closed?
The resistances are identical. With the switch K open, the ammeter reads 0.6A . What will be the ammeter reading when the switch is closed? Now as the voltage remains the same, thus, from that, we will find the value of current for when the switch is closed.
When the current flowing through a circuit is switched off then?
Direction of the induced current is such that it opposes any change occurring in it. Since switched is off then magnetic flux across the inductor decreases hence emf is induced so that flux through the inductor increases hence directio of the induced current will be in the same direction as of the main current.
What happens if the switch is closed in a parallel circuit?
In a parallel circuit, the current will flow through the closed paths and not through the open paths. Consider a simple circuit with an outlet, a switch and a 60 watt light bulb. If the switch is closed, the light operates. That’s why parallel circuits are used for wiring lighting and receptacle outlets.
What happens to the voltmeter when the switch is closed?
When the switch is closed, the voltmeter reading drops to 2.96 V , and the ammeter A reads 1.66 A . Assume that the two meters are ideal, so they do not affect the circuit.
What happens to the voltmeter and ammeter readings when switch S is closed?
When the switch is closed the reading of the voltmeter will? When the switch is closed, the voltmeter reading drops to 2.96 V , and the ammeter A reads 1.66 A . Assume that the two meters are ideal, so they do not affect the circuit.
What happens to the current when a switch is closed?
The rate of change of current, roc i, will be greatest when the switched is closed. Current and voltage transients will be produced until the current reaches a steady-state level of E/R, at which time the coil effect will be negligible.
What is the time constant of the current in the circuit?
Thus, as the current approaches the maximum current , the stored energy in the inductor increases from zero and asymptotically approaches a maximum of The time constant tells us how rapidly the current increases to its final value. At the current in the circuit is, from (Figure), which is of the final value .
What happens to the energy of a capacitor when a switch closes?
If the capacitor contains a charge before the switch is closed, then all the energy of the circuit is initially stored in the electric field of the capacitor ( (Figure) (a)). This energy is When the switch is closed, the capacitor begins to discharge, producing a current in the circuit.
What is the effect of time constant on induced voltage?
At the magnitude of the induced voltage is The voltage across the inductor therefore drops to about of its initial value after one time constant. The shorter the time constant the more rapidly the voltage decreases.