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The problems of electricity two light bulbs of 100 watt and one 60 watt both operation in a 220V circuit. Which bulb has the higher resistance and which bulb carries the greater current?
Wiki User
∙ 11y ago
A 100 watt 220 volt light bulb (or anything consuming 100 watts on 220 volts) draws 100/220, or .45 Amps. It will also have about 220²/100, or 484 ohms resistance.
A 60 watt 220 volt light bulb (or anything consuming 60 watts on 220 volts) draws 60/220, or .27 Amps. It will also have about 220²/60, or 807 ohms resistance.
Wiki User
∙ 10y ago
Wiki User
∙ 11y agoIf the lamps are connected in parallel, the higher wattage lamp has the lower resistance and draws the greater current.
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Lightning carries Alternating current or Direct Current?
Power lines carry electricity as alternating current.
What is a ring circuit?
Usually,there are many mains sockets in a flat to provide electricity for electrical appliances.Do you know how these mains sockets are connected to the electric cable that carries electricity to the flat? The electric cable that carries electricity to a flat is connected to the consumer unit.In the consumer unit,the electric cable branches into a number of parallel circuits that deliver electricity to ceiling lamps,mains sockets,air conditioners(or other appliances with high working current),etc.The circuit that delivers electricity to main sockets exists in form of a ring and is therefore called a ring circuit. The ring circuit provides two paths for electric current to flow from the consumer unit to the mmain sockets.Each path only carries half of the electric current.Therefore,the chance of overloading the circuit is reduced.Besides,if one of the paths is damaged,there's still another path for carrying electric current.
What is a current-carrying wire?
A wire with some resistance and a voltage applied to it The amount of current I passing this wire is V/R
Does the resistance depend on the frequency?
Yes. The resistance does depend on frequency. The reason is 'skin effect'. When an alternating current is passed through a conductor only a small portion of the conductor, usually called the skin depth carries the current. The value of skin depth is inversely proportional to frequency. As the frequency is increased, the skin depth decreases. But the value of ac resistance is directly proportional to frequency, or in other words, inversely proportional to skin depth. Thus, at higher frequencies, ac resistance is higher. This is the reason why we multiply the dc resistance by an empirical value 1.2 or 1.3 to calculate its ac equivalent.
How is electric current created?
Current is the flow of electrons through a conducting substance. Each electron carries an electric charge - so as electrons pass through a substance, such as a metal, then we say an electric current (made up of the electric charges that each electron carries) passes through that substance. We measure current in amperes, often calls "amps". Voltage refers to the potential difference of the electric charge across a boundary or between two points. So if we were to have a high accumulation of electrons in one place (lets say on the ground), and not very many electrons in another place (say in a cloud), then we would say there is a potential charge, or a voltage that we can measure between those two points. Electrons repel each other, and they are attracted to areas where there is a deficiency of electrons. So the force of the electrons trying to move away from other electrons, and towards areas of fewer electrons, is the voltage, and the actual flow of these electrons is the current. Think of electricity like the water in a hose. The water pressure is the voltage - it makes the drops of water flow through the hose. As the pressure increases, so does the flow. Similarly in electricity, as the voltage increases, so does the current. Resistance, measured in ohms, measures how much a substance opposes the flow of electricity. Think of a nozzle at the end of our hose. As we open the nozzle, the resistance to the water flow goes down, and more water flows out the end of the hose. As we close the nozzle, less water flows out the end of the hose, even thought the water pressure remains the same. The same holds true in electricity - as the resistance increases, the current goes down, and as the resistance decreases, the current goes up. Some materials, like copper, have very low resistance, meaning electricity flows through it very easily, and that is why we use copper wires to carry electricity. Some materials, like plastic, has very high resistance, and that is why we use a plastic coating around the copper wire to insulate the copper, and thus keep the flow of electricity away from our body. So now we have everything we need to understand current: 1. Current is the flow of electrons through a substance. 2. Current is driven by voltage - the higher the voltage, the higher the current. 3. Current is reduced by resistance - the higher the resistance, the lower the current.
What carries electricity?
conductors
What is a substance that carries electricity wall?
a power controller carries electricity but stops when it smacks into a wall because walls are hard
What carries the electricity to your house?
Power lines
What is the definition of the resistance arm?
The resistance arm is the side of the lever (from the fulcrum to the load) that carries the load.
Who carries out open market operation in India?
rbi
Which is a network of wires that carries electricity?
the power grid
What is a substance that carries electricity under circumstances but not under other circumstances is called?
A substance that carries electricity under certain circumstances but not under others is called a semiconductor.
Which material best carries electricity?
All metals conduct electricity but the best metal conductor is Silver. At low low temperature exotic alloys begin to superconduct - that is carry current with virtually no resistance what-so-ever.
What is a substance called that carries electricity under certain circumstances but not under other circumstances?
A substance that carries electricity under certain circumstances but not under others is called a semiconductor.
What is a substance that carries elecritiy well?
copper conductor of electricity
What is a substance that carries electricity under certain circumstances but not under other circumstances called?
A substance that carries electricity under certain circumstances but not under others is called a semiconductor.
What happens when someone adds carries or subtracts?
An arithmetic operation happens.
