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Yes, we use AC (alternating current) in our homes, the current changes direction 120 times a second.
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If one of the three lamps blows out when connected in series what happens to the current in the other two?
In a series circuit there is only one path for current to flow. The current will flow through each good lamp. If any lamp opens (blows), then the circuit is broken and current flow stops. The older strings of Christmas tree lights used to be connected in series and it was hard to fine the blown bulb. If there were two burnt out bulbs almost impossible to find.
A 2.5 Amperes current flows through a 100W lamp what is the voltage?
The formula you are looking for is E = W/I.
Why choke coil is used in tube light?
To limit the current through the lamp when the gas ionises and conducts.
Will the current reaching a lamp after passing through a resistor in series be equalwhy?
A: Because both item are connected is series. Any resistance connected in series will carry the same current no matter of the resistance value or the number of resistors. However for an incandescence lamp the value will change when turn on and change when it is hot, That is because lamps have different property then resistance when cold and hot
What happens to the brightness of the bulbs in a parallel circuit?
A lamp's rated power only applies when the lamp is supplied with its rated voltage. If you connect the lamps in series, with the same supply voltage, then the lamps are no longer subjected to their rated voltage and, so, will not operate at their rated power.
Why must a light bulb be connected to both ends of a battery to light up?
For current to flow through the lamp, there must be a potential difference (voltage) applied across opposite ends of that lamp.
What is the difference between a parallel circuit and a series circuit?
A parallel circuit is one in which there is more than one current path. An example might be several light bulbs in a house, all of which provide a path for electric current. The advantage is that any of the lamps can be turned on or off without affecting the current flow through any other lamp. A series circuit is one in which the current has only a single path through multiple components. An example might be two resistors, one after the other. Both will have the same current through them but they may have varying voltages depending on their resistance. Another example of a series circuit is a houehold lamp and a light switch. When the light switch is open, no current flows through it and therefore, no current can flow through the lamp either. When the switch is closed, current will now flow through the switch and the lamp.
When a lamp is switched off is the electrical current to the light open or closed?
Open and closed does not refer to electrical current or the flow of electricity. Open or closed refers to the state of an electrical circuit. When a lamp is turned on electricity flows through wires, the switch and the lamp; and the circuit is considered closed. When a lamp is switched off the circuit is considered open (or broken) and the flow of electric current is stopped.
If one of the three lamps blows out when connected in series what happens to the current in the other two?
In a series circuit there is only one path for current to flow. The current will flow through each good lamp. If any lamp opens (blows), then the circuit is broken and current flow stops. The older strings of Christmas tree lights used to be connected in series and it was hard to fine the blown bulb. If there were two burnt out bulbs almost impossible to find.
What are open circuits?
In open circuits the path for current to flow is broken. If you turn off a light switch, you are "opening the circuit", current flow stops and the lamp goes out.
How much electricity does a lamp used when turned off?
When the switch is open there should be no current flow.
Why starter used in tube light fitting?
The starter is used to help the lamp light and acts like a closed switch. It allows electric current to flow through the filaments.
Why does a fluorescent fixture start with high voltage but shut off at low voltage?
Basically it takes a higher current to start a fluorescent lamp that it does to sustain the arc. (It's higher current, not voltage. The voltage is constant.) The ballast regulates the current flow through the lamp. Removing the voltage from devices requiring power will turn any device off.
What is an Argand lamp?
An Argand lamp is a lamp with a circular hollow wick and glass chimney which allows a current of air both inside and outside the flame.
How does a npn transistor switch work to switch a load on and off?
let's insert a transistor in place of the switch to show how it can control the flow of electrons through the lamp. Remember that the controlled current through a transistor must go between collector and emitter. Since it is the current through the lamp that we want to control, we must position the collector and emitter of our transistor where the two contacts of the switch were. We must also make sure that the lamp's current will move against the direction of the emitter arrow symbol to ensure that the transistor's junction bias will be correct as in Figure below(b).
Does current in the lamps occur simultaneously or does charge flow first through one lamp then the other and finally the last in turn?
Currents are either flowing or they are not. However these lamps are hooked up, series or parallel, the minute current starts flowing through a circuit it is moving throughout the entire circuit.
How does an electric circuit with a battery lamp copper wire and switch work?
The battery provides the current and the energy; the lamp consumes the energy when the current goes through it; the copper wire conducts the current; and the switch lets you close or open the circuit (so that current passes, or doesn't pass, through).
