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koban [17]
3 years ago
13

Consider a situation in which you are moving two point charges such that the potential energy between them decreases. (NOTE: ign

ore gravity).
This means that you are moving the charges:
a) Closer to each other
b) Farther apart
c) Either A or B
Physics
1 answer:
Oxana [17]3 years ago
5 0

Answer: Option A

Explanation:

The potential energy decreases in the case when the charges are opposite and they attract each other.

In this case there is no external energy required in order to put the charges together.

This is so because the charges are opposite and they will attract each other. Yes, the only condition should be that the charges should be alike.

Example: a negative charge and a positive charge.

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The velocity of a particle moving along the x-axis varies with time according to v(t) = A + Bt−1 , where A = 2 m/s, B = 0.25 m,
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Answer:

a= -2\ m/s^2

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To find acceleration :

we know that

a=\dfrac{dv}{dt}

\dfrac{dv}{dt}=0-0.5t^{-2}

a=-0.5t^{-2}

Acceleration at t= 2 s

a=-0.5\times 2^{-2}

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Acceleration at t= 5 s

a=-0.5\times 5^{-2}

a=-12.5\ m/s^2

We know that

v=\dfrac{dx}{dt}

dx=\left(2+\dfrac{1}{4t}\right)dt

Position at t= 2 s:

\int_{0}^{x}dx=\int_{1}^{2} \left(2+0.25\dfrac{1}{t}\right)dt

x=\left [2t+0.25\ lnt \right ]_{1}^{2}

x=2+0.25 ln2

x=2.17 m

Position at t= 5 s:

\int_{0}^{x}dx=\int_{1}^{5} \left(2+0.25\dfrac{1}{t}\right)dt

x=\left [2t+0.25\ lnt \right ]_{1}^{5}

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2 years ago
Suppose that a rectangular toroid has 1,500 windings and a self-inductance of 0.060 H. If the height of the rectangular toroid i
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Answer:

Current in the toroid will be I=17.32\times 10^{-3}A

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We have given number of winding in rectangular toroid N = 1500

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We have to find the current in the toroid

Magnetic energy stored is equal to E=\frac{1}{2}Li^2

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So current in the toroid will be I=17.32\times 10^{-3}A

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