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Physics: Post your doubts here!

Farhad221

Farhad221

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Does anybody know where can i find A2 topical papers for physics and if someone has softcopy of them i will be really glad if you can upload them?
 
A

ashcull14

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A mass accelerates uniformly when the resultant force acting on it
A is zero.
B is constant but not zero.
C increases uniformly with respect to time.
D is proportional to the displacement from a fixed point.
ans is B ...why not C?
 
princess Anu

princess Anu

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When the slider is moved to Y, the potentiometer P and the voltmeter are in series {no current flows through Q} with almost all the resistance in the voltmeter {as stated in the question, the voltmeter has a very high resistance},
I have a question!, if the question had stated Voltmeter has a infinite resistance, then? there would have been no current in the voltmeter so the ans wud have been D, right?
Physicist said:
see 120 at
http://physics-ref.blogspot.com/2014/11/physics-9702-doubts-help-page-22.html
Click to expand...
 
princess Anu

princess Anu

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ashcull14 said:
A mass accelerates uniformly when the resultant force acting on it
A is zero.
B is constant but not zero.
C increases uniformly with respect to time.
D is proportional to the displacement from a fixed point.
ans is B ...why not C?
Click to expand...
f=ma since mass is constant F is proportional to acceleration, & since acc is uniform hence Force is uniform too!
 
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