applications of ohms law used in daily life
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5 Practical Applications of Ohm's Law in Daily Life
Speed Control of Conventional Fans
The speed of conventional fans can be controlled using potentiometer which is also an application of the law.
Fuse design and Circuit Breakers Designs are also implemented using the Law
Advanced level laws:
Advanced level laws such as Kirchhoff’s Norton’s, Thevenin’s are based on this law.
DC Power Supply is employed as power source for different components in labs. It provides variable output voltage based on the resistance and the overall working is controlled by Ohm’s Law.
Electric Heaters, Kettles and Other Equipment
The working of heaters, kettles and other equipment also follows this law.
Mobile Phone & Laptop Charger
Mobile phone & laptop chargers use DC power supply in operations. As described earlier that working of this supply depends on the Ohm’s law.
Resistive filament bulb
Although not widely employed today, the old day’s filament bulb holds the application of P =VI (a modified form of V = IR)
Alternator
Modern day generation of electrical power uses Alternator/Synchronous generator. The internally generated voltages are based on flux which in turn uses Resistance/current relationships of rotor’s winding.
The other equipment which uses similar applications of law in their working are all named here:
Electric Iron
Rocket
Space Ship
Solid state Electronics
BJT Transistor
Amplifiers
MOSFETS
JFETS
Cell phone/Electronic Circuits
Wiring and working of small/medium/large/mega sized IC and discrete circuits.
Sources:
Current Flow and Ohm's Law
A Law of Physics in the Classroom: The Case of Ohm’s Law
Ohm’s law
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Thomas Wong, Technologist, Technology Executive
Updated Dec 4, 2015
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Ohm's law : V=I*R
V is voltage, I is current, R is resistance
You probably want to know one more thing....power=I*V
As an example, you have a 50 watt light bulb. For normal household electrical outlets, the voltage is 120 volt. From the power equation, we can see current is only .42 amp. Let's say you have 1 ohm resistance in your long extension cord including plug and socket resistance....the voltage drop across your extension cord, plug and socket is .42 amp * 1 ohm or .42 volt. This voltage is less than .5% of the outlet voltage....no problem at all.
Now, let's say you want to use 50 watt light bulb again; but instead, you like to use the 12 volt system in your backyard. This time, using the power equation, current would be 4.2 amp. With a similar gauge wire and length as your previous extension cord, similar contact and socket resistance, you also have 1 ohm resistance. This time, however, voltage drop across you extension cord, plug and socket would be 4.2 amp * 1 ohm =4.2 volt. This voltage is 35% of the 12 volt system.!!! This is a big problem.
This is the reason why low voltage systems require much bigger wire than normal household outlet for the same wattage applications.
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Shaun Marsh, works at E-Commerce
Answered Nov 4, 2015
Originally Answered: What is the practical application of OHM's law?
Ohm's law is applicable to any circuit, be it DC or be it AC.
Answer
Ohm's Law is applicable to all linear or ohmic circuits, regardless of whether they are d.c. or a.c. A linear or ohmic circuit is one in which the ratio of voltage to current is constant for variations in voltage. Ohm's Law does not apply to non-linear or non-ohmic circuits (e.g. tungsten, electronic devices such as diodes, and electrolytes).
(OR)
Ohm’s Law (I = E/R) involves three things. I (current in amperes), E (voltage in volts), and R (resistance in ohms). Thus, by measuring, or knowing two, you can determine the third in any circuit. Such permits you to alter one by changing the other two. For example, if you need to change I (current) you can increase E or reduce R. Many devices have current restrictions, some have voltage restrictions, and some resistance restrictions. The device might be a transistor, motor, toaster oven, sound system, etc.
@https://www.electrikals.com/
7.5k Views ·
Speed Control of Conventional Fans
The speed of conventional fans can be controlled using potentiometer which is also an application of the law.
Fuse design and Circuit Breakers Designs are also implemented using the Law
Advanced level laws:
Advanced level laws such as Kirchhoff’s Norton’s, Thevenin’s are based on this law.
DC Power Supply is employed as power source for different components in labs. It provides variable output voltage based on the resistance and the overall working is controlled by Ohm’s Law.
Electric Heaters, Kettles and Other Equipment
The working of heaters, kettles and other equipment also follows this law.
Mobile Phone & Laptop Charger
Mobile phone & laptop chargers use DC power supply in operations. As described earlier that working of this supply depends on the Ohm’s law.
Resistive filament bulb
Although not widely employed today, the old day’s filament bulb holds the application of P =VI (a modified form of V = IR)
Alternator
Modern day generation of electrical power uses Alternator/Synchronous generator. The internally generated voltages are based on flux which in turn uses Resistance/current relationships of rotor’s winding.
The other equipment which uses similar applications of law in their working are all named here:
Electric Iron
Rocket
Space Ship
Solid state Electronics
BJT Transistor
Amplifiers
MOSFETS
JFETS
Cell phone/Electronic Circuits
Wiring and working of small/medium/large/mega sized IC and discrete circuits.
Sources:
Current Flow and Ohm's Law
A Law of Physics in the Classroom: The Case of Ohm’s Law
Ohm’s law
31.6k Views · View Upvoters
Upvote · 5
Share
Comment...
Promoted by HiChina Travel
Looking for information on traveling to China?
We have free China guidebooks to download.
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Thomas Wong, Technologist, Technology Executive
Updated Dec 4, 2015
Continue Reading
Ohm's law : V=I*R
V is voltage, I is current, R is resistance
You probably want to know one more thing....power=I*V
As an example, you have a 50 watt light bulb. For normal household electrical outlets, the voltage is 120 volt. From the power equation, we can see current is only .42 amp. Let's say you have 1 ohm resistance in your long extension cord including plug and socket resistance....the voltage drop across your extension cord, plug and socket is .42 amp * 1 ohm or .42 volt. This voltage is less than .5% of the outlet voltage....no problem at all.
Now, let's say you want to use 50 watt light bulb again; but instead, you like to use the 12 volt system in your backyard. This time, using the power equation, current would be 4.2 amp. With a similar gauge wire and length as your previous extension cord, similar contact and socket resistance, you also have 1 ohm resistance. This time, however, voltage drop across you extension cord, plug and socket would be 4.2 amp * 1 ohm =4.2 volt. This voltage is 35% of the 12 volt system.!!! This is a big problem.
This is the reason why low voltage systems require much bigger wire than normal household outlet for the same wattage applications.
10.5k Views · View Upvoters
Your feedback is private.
Is this answer still relevant and up to date?
Upvote · 2
Share
Comment...
RecommendedAll
Promoted by Worldquant University
At Worldquant University, all tuition costs are covered.
MSc programs in financial engineering can cost more than $50K but ours is tuition-free for every student.
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Shaun Marsh, works at E-Commerce
Answered Nov 4, 2015
Originally Answered: What is the practical application of OHM's law?
Ohm's law is applicable to any circuit, be it DC or be it AC.
Answer
Ohm's Law is applicable to all linear or ohmic circuits, regardless of whether they are d.c. or a.c. A linear or ohmic circuit is one in which the ratio of voltage to current is constant for variations in voltage. Ohm's Law does not apply to non-linear or non-ohmic circuits (e.g. tungsten, electronic devices such as diodes, and electrolytes).
(OR)
Ohm’s Law (I = E/R) involves three things. I (current in amperes), E (voltage in volts), and R (resistance in ohms). Thus, by measuring, or knowing two, you can determine the third in any circuit. Such permits you to alter one by changing the other two. For example, if you need to change I (current) you can increase E or reduce R. Many devices have current restrictions, some have voltage restrictions, and some resistance restrictions. The device might be a transistor, motor, toaster oven, sound system, etc.
@https://www.electrikals.com/
7.5k Views ·
Answered by
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Incandescent Bulbs are the most used one. above mentioned appliances are real life application of ohm's law. in above mentioned appliances heat is being produced by a current carrying conductor, the resistance of that conductor is responsible for this heat production.
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