New kid on the Block

Joined: 14 Mar 2012
Post: 1
14 Mar 2012 11:25:46 IST
2 People liked this
598 View Post
electric current
Engineering Entrance , Medical Entrance , NEET , JEE Main , AIIMS , JEE Main & Advanced , Physics , Electricity

what is ohm's low?

Comments (4)

New kid on the Block

Joined: 11 Mar 2012
Posts: 10
14 Mar 2012 11:53:34 IST
0 people liked this

taking the name of god like ohm ohm ohm om om om om om is ohm law
Pranav's Avatar

Hot goIITian

Joined: 5 Feb 2012
Posts: 111
14 Mar 2012 12:10:47 IST
0 people liked this

At a constant temperature,the potential difference across the ends of a conductor is directly proportional to the current flowing through the conductor............
samvarun rajulapati's Avatar

Cool goIITian

Joined: 13 Aug 2011
Posts: 49
14 Mar 2012 15:26:14 IST
0 people liked this

at constant T,potential diff.(V) is directly proportional to current(i).This is ohm's law
Yagyadutt Mishra's Avatar

Forum Expert
Joined: 19 Feb 2009
Posts: 1958
14 Mar 2012 15:48:31 IST
3 people liked this

After the electricity was discovered scientist were well known about the fact that , electric energy is tranfered between two point in the form of electric current.So the whole scenario was like there are two points A and B , a simple wire is joining these two points , and suppose R is the resitance of this simple wire , and once we connect these two wires with a voltage source ( which is definitely the source of electric energy ) then an Electric current I suddenly starts flowing between the two points A and B..Refer this figure for a better analogy


So scientist were not so mad ( definitely they were not ) . Hence they started changing the value of R ( which is the resistance of wire ) , and they saw that when the value of R is increased then the amount of current flowing through the wire AB started decreasing.Now this is somewhat an interesting phenomenon that they have noticed on that time.

So Mr. Ohm came up with his own theory ( in fact he had started this experiment , arranging a simple wire between two points and varrying the resistance keeping Voltage constant )

# He noiticed that , when V is kept constant , then Increasing Resitance decreases the current in the network.
# He kept Resistance constant , and he noticed that Increasing the voltage increases the current in the network
( obviously current will be increased because voltage is nothing just a bag of electric energy and current is nothing just a carrier of this energy so once you started increasing the size of bag and the amoung of energy into it , current will atomatically increase )

So according to his experiment , he discovered a law , which says ...

Current in as circuit ,  I is directly proportion to the Voltage , and Inversely proportion to R

So he wrote => V = I * R or  I = V / R

P.S : Jitani kahani abhi tak banayi sab samjhane ke liye thi ,
point is simple ..Ohm's law says that Voltage in the network is directly proportional to the current and when you remove the proportionality symbol , a constant factor will be multiplied and that is R .

Quick Reply


Some HTML allowed.
Keep your comments above the belt or risk having them deleted.
Signup for a avatar to have your pictures show up by your comment
If Members see a thread that violates the Posting Rules, bring it to the attention of the Moderator Team
Free Sign Up!
Sponsored Ads

Preparing for JEE?

Kickstart your preparation with new improved study material - Books & Online Test Series for JEE 2014/ 2015

@ INR 5,443/-

For Quick Info






Vertical Limit

Top Contributors
All Time This Month Last Week
1. Bipin Dubey
Altitude - 16545 m
Post - 7958
2. Himanshu
Altitude - 10925 m
Post - 3836
3. Hari Shankar
Altitude - 10085 m
Post - 2217
4. edison
Altitude - 10825 m
Post - 7804
5. Sagar Saxena
Altitude - 8635 m
Post - 8064
6. Yagyadutt Mishr..
Altitude - 6330 m
Post - 1958

Find Posts by Topics






Parents Corner


Fun Zone