Qualification > Sciences

PHYSICS AS HELP

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astarmathsandphysics:
Ok. When I get home

~Mimi~:
Nov 2006. Ques.30.
Isn't it because it's a uniform field. E is constant anywhere within the field. Is that correct?

nid404:
but the formula E=V/d is for a uniform field...... :-\

~Mimi~:
May / June 2004. # 35

( I hope it makes sense, lol...)

Basically R=V/I
When the resistance of the variable resistor decreases, the share of voltage across it also falls. Since the sum of the voltages across the two resistors must add up to the same old number. The share of voltage across the fixed resistor will then increase.

For the current, when resistance of the variable resistor falls. The sum of resistance in circuit ( fixed+variable) falls.
Since R= V/I. The current increases.

So the answer is D.

~Mimi~:

--- Quote from: \m/ |\|!d \m/ on March 21, 2010, 02:39:24 pm ---but the formula E=V/d is for a uniform field...... :-\


--- End quote ---

yh, that's true..... :-\

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