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What voltage must be applied to a 6.4-ohm lamp filiment to develop 20 amperes of current t?
I x R = E 20 x 6.4 = 128 Volts
When the thermistor in the circuit is heated the lamp becomes brighter why does this happen?
When the thermistor in the circuit is heated, its resistance decreases due to the negative temperature coefficient of thermistors. This reduction in resistance allows more current to flow through the circuit. As a result, the increased current causes the lamp to receive more power, leading to a brighter illumination.
Can current flow both ways through a lamp?
Yes, we use AC (alternating current) in our homes, the current changes direction 120 times a second.
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.
What voltage must be applied to a 6.4-ohm lamp filiment to develop 20 amperes of current t?
I x R = E 20 x 6.4 = 128 Volts
What will happen to the lamp if current decreases?
brightness will decrease
What type of cord is used in a lamp?
Lamps use what is called a power cord. Power cords connect the appliance (in this case, a lamp) to a wall socket and the electrical field causes the filiment in the light bulb to beam.
What does a lamp in a circuit do?
A lamp in a circuit converts electrical energy into light energy when current flows through it. This conversion is possible due to the properties of the lamp's filament or gas, which heats up and emits light when electricity passes through it.
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).
When the thermistor in the circuit is heated the lamp becomes brighter why does this happen?
When the thermistor in the circuit is heated, its resistance decreases due to the negative temperature coefficient of thermistors. This reduction in resistance allows more current to flow through the circuit. As a result, the increased current causes the lamp to receive more power, leading to a brighter illumination.
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.
Why is the lamp wire hot?
The lamp wire is hot because electrical current flowing through it encounters resistance, which causes the wire to heat up.
What is the function of ignitor in lamp?
The ignitor in a lamp is responsible for creating a high voltage pulse to initiate the discharge of the lamp. It helps to start and maintain the electric current flow through the lamp, ensuring that it lights up properly.
A 75 ohm light and a 150 ohm heater are connected in parallel to a 150 volt power source. What is the current through the 75 ohm lamp?
2 amps
Can current flow both ways through a lamp?
Yes, we use AC (alternating current) in our homes, the current changes direction 120 times a second.
What is the current when a 60 watt lamp is connected to 120 volta?
To find the current, use Ohm's Law, which states that current (I) equals power (P) divided by voltage (V). For a 60-watt lamp connected to 120 volts, the current is calculated as follows: I = P/V = 60 watts / 120 volts = 0.5 amperes. Therefore, the current flowing through the lamp is 0.5 A.
