Qualification > Sciences
ALL PHYSICS DOUBTS - POST HERE !!
Vin:
I think when the magnet is entering it deflects to the right .. because that is when the pd in induced .. and the polarity of the solenoid is North which opposes the magnet to induce the pd
while removing the meter should deflect to the left because according to Lenz's law wen the mag. is removed the solenoid becomes South and attracts the mag.
ambitious94:
--- Quote from: Ari Ben Canaan on May 26, 2010, 01:34:51 pm ---This question has been bugging me. I saw it in a few GCE past papers.
You know that diagram for Lenz's Law in all textbooks ? It shows a magnet entering a solenoid....
okay, How do I predict which way the Galvananometer or ammeter will defelct ? Like will go tot the right or left and why ?
Like in the diagram below :
Which way does the ammeter pointer deflect towards ? Left or right ?
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Ok, for this first u have to determine the North and South poles of the solenoid. That u have to determine by Lenz's law. Now North always has anticlockwise current right? So u simply draw the arrow for the direction of current. The Ammeter needle will deflect in the direction of the current. Simple. :) like in the case of ur diagram, it will move towards the right side, cuz htat's where the current is goin
Fastal:
--- Quote from: ambitious94 on May 26, 2010, 01:42:19 pm ---Ok, for this first u have to determine the North and South poles of the solenoid. That u have to determine by Lenz's law. Now North always has anticlockwise current right? So u simply draw the arrow for the direction of current. The Ammeter needle will deflect in the direction of the current. Simple. :) like in the case of ur diagram, it will move towards the right side, cuz htat's where the current is goin
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i THINK he/she is right
Raywin:
--- Quote from: jellybeans on May 26, 2010, 01:39:56 pm ---HI!!!! need some help here... are my answers right..? or wrong.. hehhs, :P
help pleaseee :D
... helllllppp .. dont really know what the MS's talking about... :(
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I think ur right.. :P wht does the MS tell?
ambitious94:
--- Quote from: Ari Ben Canaan on May 26, 2010, 12:55:39 pm ---Here....
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Thanks for this! i was just about to request the answer to it :) But one thing's bugging me. Why'd they give us the diagram of the house? Aren't those switches that are drawn in the diagram in the question...I'm gettin confused with that :)
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