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Protection from Earthquake : Steps to Follow

ntblock-2 hav...

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ntblock-2 having mass m and charge Q is held stationary in air with the help of block-1 carrying some charge. If the distance between the blocks is h, then the charge on block-1 isn

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Q. A particle having a charge 10 mC is held fixed on a horizontal surface. A block of mass 80 g and having charge stays in equilibrium on the surface at a distance of 3 cm from the first charge. The coefficient of friction between the surface and the block is

μ = 0.5

. Find the range within which the charge on the block may lie

Q. Block 1 is placed at a distance d from Block 2. A total charge Q is distributed among the two blocks such that a charge q is given to 1. What should be q for the force between 1 and 2 to be maximum?

Q. Two small and charged blocks of masses

m_{1} = m_{2} = 20

q_{1} = 0.6 μ C a n d q_{2} = 2.4 μ C

are placed at a distance

r = 60

cm. Coefficient of friction between block 2 and ground is

μ = 0.5

. Find frictional force between block 2 and ground (assuming initially block 2 is at rest).

Q. A Non-conducting block performs

SHM

on a frictionless surface with frequency,

ν_{0}

. The block carries a charge

+ Q

on its surface. If a uniform electric field

\to E

is switched-on as shown, then the

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- 10 nC

charge on it. Block and finite line charge are along same line. If in equilibrium, extension of spring is

10 cm

then spring constant

(K)

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