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Electric Charge

If a small sp...

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If a small sphere of mass m and charge q is hungfrom a silk thread at an angle θ with the surface of a vertical charged conducting plate, then for equilibrium of sphere, the surface charge densityof the plate is

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Q. If a small sphere of mass m and charge q is hung from a silk thread at an angle

θ

with the surface of a vertical charged conducting plate, then for equilibrium of sphere, the surface charge density of the plate is

Q. One end of a 10 cm long silk thread is fixed to a large vertical surface of a charged non-conducting plate and the other end is fastened to a small ball of mass 10 g and a charge of

4 \cdot 0 \times 10^{- 6} C

. In equilibrium, the thread makes an angle of 60° with the vertical. Find the surface charge density on the plate.

10 c m

long silk thread is fixed to a large vertical surface of a charged nonconducting plate and the other end is fastened to a small ball having a mass of

10 g

and a charge of

4.0 \times 10^{- 6} C

. In equilibrium, the thread makes an angle of

60^{o}

with the vertical. Find the surface charge density on the plate.

Q. A small sphere with mass

1.2 g

hangs by a thread between two parallel vertical plates

5 c m

apart. The plates are insulating and have uniform surface charge densities

+ δ

- δ

. The charge on the sphere is

q = 9 \times 10^{- 6} C

. What potential difference (in V) between the plates will cause the thread to assume an angle of

37^{\circ}

with the vertical as shown in figure?

Q. A small sphere with mass 1.2 g hangs by a thread between two parallel vertical plates 5.00 cm apart. The plates are insulating and have uniform surface charge densities

+ σ

- σ

. The charge on the sphere is

q = 9 \times 10^{- 6} C

. What potential difference between the plates will cause the thread to assume an angle of

37^{\circ}

with the vertical as shown in figure ?

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