Welcome Visitor! Login | Sign Up | Help!

|

Follow us on:

Electricity

Cool goIITian

 Joined: 29 Aug 2010 Post: 34
27 Feb 2012 01:24:52 IST
0 People liked this
2
371
ac through inductor
Engineering Entrance , Medical Entrance , NEET , JEE Main , AIIMS , JEE Main & Advanced , Physics , Electricity

acrdng 2 d graph given in ncert physics(attached)...d current produced lags behind alternating emf...physically wot does it mean...when the applied initial voltage is zero,how can max current flow in the opposite direction??....also in some other articles(in web),emf is said to vary with respect to current....actually wot is happening

#### Comments (2)

Forum Expert
Joined: 19 Oct 2006
Posts: 7802
27 Feb 2012 10:44:58 IST
0 people liked this

The phase lag between current and voltage in purely inductive circuit is pi/2. Unlike in purely resistive circuit where the change in voltage (ac) is synchronized with change in current (ac) and the two are in phase that is phase difference is ZERO. But in inductive circuit current (ac) is not able to chase the voltage and this results in a phase lag, certainly current can be non zero when voltage is zero as here there is a phase difference and the applied voltage is ac. Hope it is clear !!!

Scorching goIITian

Joined: 12 Apr 2011
Posts: 290
3 Mar 2012 14:48:09 IST
0 people liked this

Charges can be moved by the application of emf or potential difference. This is the case we all expect that a current can be there only when there is a pot.diff. But in the case of AC, THE PHYSICAL MEANING IS that when the emf or p.d drops to zero momentarily or quick the charges DUE TO INERTIA CONTINUES TO MOVE which constitute current even without pot.diff

# Quick Reply

### 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

## For Quick Info

Name

Mobile

E-mail

City

Class

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 - 10050 m Post - 2205
4. edison
 Altitude - 10815 m Post - 7802
5. Sagar Saxena
 Altitude - 8625 m Post - 8064
6. Yagyadutt Mishr..
 Altitude - 6330 m Post - 1979

Physics

Topics

Mathematics

Chemistry

Biology

Institutes

Parents Corner

Board

Fun Zone