Table of Contents
- 1 What will happen if the switch in the primary circuit is suddenly closed?
- 2 What happens when a switch is closed in a transformer?
- 3 What do you call the part of the circuit that opens or closes the flow of current?
- 4 What will happen to the transformer if it is supplied with DC supply of same voltage?
- 5 What happens to the current when a switch is closed?
- 6 Can voltage change instantaneously in an inductor?
What will happen if the switch in the primary circuit is suddenly closed?
What will happen to the brightness of the light bulb if the switch in this circuit is suddenly closed? Ideally, there will be no change whatsoever in the light bulb’s brightness when the switch is closed, because voltage sources are supposed to maintain constant voltage output regardless of loading.
What will happen if we give a DC input to the primary side of a transformer?
When a DC voltage is applied to the primary winding of a transformer, due to low resistance, the winding acts as a short circuit across the terminals of the DC source that lead to the flow of heavy current through the winding resulting in overheating of the winding.
What happens when a switch is closed in a transformer?
If the switch is closed, an emf will be induced on the second solenoid, which amplifies the car battery’s voltage. The question is what happens when the switch is open and suggest a useful practical modification to the primary circuit.
What would happen if you connect a transformer to a DC circuit with a voltage of 20\% of nameplate rating after a steady state condition is reached?
Nothing, because in DC the magnetic flow does not vary, is constant, and have not producing varous of flow. in the winding secondary.
What do you call the part of the circuit that opens or closes the flow of current?
Make or Break – You make a circuit by closing the current path, such as when you close a switch. Breaking a circuit is the opposite. Opening a switch breaks the circuit.
What happens to the galvanometer needle when you close the switch?
When the switch is opened and closed, the galvanometer registers currents in opposite directions. No current flows through the galvanometer when the switch remains closed or open. It was found that each time the switch is closed, the galvanometer detects a current in one direction in the coil on the bottom.
What will happen to the transformer if it is supplied with DC supply of same voltage?
The transformer works on the principle of mutual induction, in which the current in a coil must change evenly. With DC power supply, the current does not change due to the constant supply and the transformer does not work.
What would happen if a transformer is connected to DC supply Mcq?
18) If a transformer is connected to a direct current supply, what happened? Explanation: The tapings can be placed either on high voltage (HV) or low voltage (LV) windings. Good voltage regulation is possible with high voltage winding as it carries a large number of turns.
What happens to the current when a switch is closed?
While the switch is closed, the current in the series circuit is determined only the series resistance I=E/R = 200/100 = 2A. When the switch is opened at time=0, the 2A current keeps flowing, but it flows into the tiny capacitor, causing the voltage across the opening switch to climb to huge values.
What is a closed circuit in electrical circuits?
An electric circuit has a source of Electromotive force and a load. This load acts as a conductor path. If the current flows through the load it is considered as a closed circuit. If in a simple circuit, current can flow from one terminal of the battery to another without any discontinuation is said to be closed circuit.
Can voltage change instantaneously in an inductor?
You know that current cannot change instantaneously in an inductor, but the voltage across it can. Think about the equation that relates the voltage across an inductor and the current through it. What happens to the voltage if you suddenly break the circuit?
What happens when an inductance is opened?
When you open circuit an inductance with current flowing in it, it will generate whatever voltage is required to maintain the continuity of that current. In most situations this results in a transient voltage surge that dumps only a small amount of energy.