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Standard XII

Physics

Conservation of Energy in Case of Electrostatics

A particle of...

Question

A particle of mass $2 g m$ and charge $1 μ C$ is held at rest on a frictionless horizontal surface at distance $1 m$ from the fixed charge $1 m C$ . If the particle is released, it will be repelled. The speed of the particle when it is at a distance of $10 m$ from the fixed charge is

100 m s^{- 1}

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90 m s^{- 1}

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60 m s^{- 1}

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45 m s^{- 1}

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Solution

The correct option is B $90 m s^{- 1}$
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Similar questions

Q. A particle of mass

2 g

and charge

1 μ C

is held at a distance of

1 m

from a fixed charge of

1 m C .

If the particle of released it will be repelled. Speed of the particle when it is at a distance of

10 m

from the fixed charge is

Q. In free space, a particle A of charge

1 μ C

is held fixed at a point P. Another particle B of the same charge and mass

4 μ g

is kept at a distance of

1 m m

from P. if B is released, then its velocity at a distance of

9 m m

from P is :
[Take

\frac{1}{4 π ε_{0}} = 9 \times 10^{9} N m^{2} C^{- 2}

]

Q. Two identical charges,

5 μ C

, each are fixed at a distance

8 c m

and a charged particle of mass

9 \times 10^{- 6} k g

and charge

- 10 μ C

is placed at a distance

5 c m

from each of them and is released. Find the speed of the particle when it is nearest to the two charges.

Q. A point charge

+ Q

having mass

m

is fixed on horizontal smooth surface. Another point charge having magnitude

+ 2 Q

and mass

2 m

is projected horizontal towards the charge

+ Q

from far distance with velocity

v_{o}

.

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when it is closest to fixed particle

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Q. A particle of mass

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and charge

- 2 μ C

(initially at a very large distance) is projected with initial velocity

200 m/s

towards a positive charged particle of charge

2 μ C

which is fixed. The distance of

1 kg

particle from heavy particle when speed of

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particle is equal to twice of initial value is

\frac{x}{10^{7}} m

. Find the value of ‘

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’.

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A particle of mass 2 gm and charge 1 μC is held at rest on a frictionless horizontal surface at distance 1m from the fixed charge 1mC. If the particle is released, it will be repelled. The speed of the particle when it is at a distance of 10m from the fixed charge is

The correct option is B 90ms−1undefined

A particle of mass $2 g m$ and charge $1 μ C$ is held at rest on a frictionless horizontal surface at distance $1 m$ from the fixed charge $1 m C$ . If the particle is released, it will be repelled. The speed of the particle when it is at a distance of $10 m$ from the fixed charge is

The correct option is B $90 m s^{- 1}$
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