Ohms law class 10 | 10th class physics | limitations of ohms law | statement and derivation of ohms

Ohms law 10th physics chapter 14 ohms law in urdu hindi,
Ohm's law 10th physics | 10th physics chapter 14 ohms law in urdu hindi | ओम का नियम, 10 वीं भौतिकी

Ohm's law
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Queries solved in this video
1. What is ohms law?
2. What are limitations of ohms law
3. Define ohms law
4. Explain ohmsaw
5. What are ohmic and non ohmic classes

14.4 OHM'S LAW
Activity 14.1: Take a nichrome wire of about 50 cm length and
apply a potential difference of 1.5 V from a battery
(Fig.14.10a). Measure the current flowing through the wire
using an ammeter connected to it in series. Also measure the
potential difference across the wire using a voltmeter
connected across it. Obtain a set of readings for I and V, by
increasing the number of cells. Plot a graph between I and V.
This will be a straight line (Fig.14.10-b).
If V is the potential difference across the two ends of any
conductor, then current I will flow through it. The value of the
current changes with the changes in potential difference and
is explained by Ohm's law, stated as:
The amount of current passing through a conductor is directly
proportional to the potential difference applied across its
ends, provided the temperature and the physical state of the
conductor does not change.
i.e., I
V or V
I
or V = R
I
where R is the constant of proportionality, and is the
resistance of the conductors. Its SI unit is ohm, de

symbol Ω. If a graph is plotted between the current I and the
potential difference V, a straight line will be obtained.
Resistance: The property of a substance which offers
opposition to the flow of current through it is called its
resistance.
This opposition comes from the collisions of moving
electrons with atoms of the substance.
Unit of Resistance: ohm
The SI unit of resistance R is ohm. If we put V = 1 V, and I = 1 A,
the value of R will be 1 . Thus
Ω
When a potential difference of one volt is applied across the
ends of a conductor and one ampere of current passes
through it, then its resistance will be one ohm.
Example 14.2: Reading on voltmeter connected across a
heating element is 60 V. The amount of current passing
through the heating element measured by an ammeter is 2 A.
What is the resistance of the heating coil of the element?
Solution:
Given that, V = 60 V, I = 2 A
Using Ohm's law
V = IR

14.5 V-I Characteristics of Ohmic and Non Ohmic
Conductors
Ohm's law is valid only for certain materials.
Materials that obey Ohm's law, and hence have a constant
resistance over a wide range of voltages, are said to be ohmic.
Materials having resistance that changes with voltage or
current are non-ohmic.
Ohmic conductors have a linear current relationship
voltage￾over a large range of applied voltages (Fig. 14.11-a). The
straight line shows a constant ratio between voltage and
current. Ohm's law is obeyed. For example, most m

#ohmslaw
#10thPhysics

[faisalmunir]

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[uzmamuzaffar]

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[mariya]

No words to describe your teaching method. 👌 Thank you for such elaborative lectures.

[Islamic_Shorts__All]

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[MuhammadFaisalKhanKhan-gzxb]

Mashallah. Your the best teacher of us. Best outstanding teaching method ever. Thank you sir.

[backbenchersbenchers]

Your lectures is really helpful for me... In different situations...
Thanks a lot 😃😃😃

[noorazam]

Think you sir, اس سوال کا جواب تو بتا ھم تو کھتے ھےکے چاندمیں سائنس دان تو چالاھے وہاں یو وئی ریز ھے مگر اس تو بمیار لگتی ھے مگر وہاں وزن نہیں ھے وہ نممکین ھے

[sherazali]

Agr I directly proportional V ho ga tu formula change ho jaye ga tu I/V =R bn jaye ga is it correct? Aur statement me bhi phle current hi likha hai

[afnanshahid]

Sir khuda apko ior apka gahr walon ko hamesha khush rakha ameen ♥️❤️

[malikfateh]

May god bless you with health, wealth and success.jazakallah,

[MuhammadKhalid-nxki]

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[alihussain]

Sir ap ki waja sa mara9th ka 60 number hain

[makeupstudio]

The way of ur teaching method amazing MashaAllah I can easily understand thanks alot for the lectures ☺☺☺☺ always stay blessed and kindly plzzz tell the uses of A.C and D.C I am getting to much confusion in this topic I will be thankful to u seriously ☺☺

[arsalmalik]

Sir kia current can flow in a circuit without potential difference

[saimamushtaq]

Sir displacement ka symbol hum d ho ga ya hum us ko mass spring example ke Matabiq x laikhe gay agar yeh short me ata ha

[khairullaj]

sir yeh konsa sign hai jis pr arrow bhi hai ?

[amnatasneem]

Ohms law ki limitations ka bad kon sa law bnia gia

[bahjetnaqvi]

Your way of teaching and your presentation is amazing