Question

a spring mass system has time period T of its oscillation. it is now suspended above a large horizontal metal sheet with uniformly distributed positive charge. if mass is given some positive charge, then its new time period of oscillation will be ANSWER , GAIN 50 POINTS

Answer 1

If it is allowed to oscillate above a positively charged metal plate, its period will ... When a negatively charged pendulum oscillates over a positively charged plate then ...

Answer 2

Answer:  

Time length of spring mass gadget is given by

T=2π $\sqrt{m/k}$

Time period is only dependent on mass of object and sprig constant

as m and k do not change, new time period will remain T.

We assume that extension or compression in spring is very small compared to natural length of the spring

according to hooks law if F is force acting on the spring and x is compression or extension in spring

F/x=constant =k

here k is the spring constant

so here if the extension or compression is within elastic limit of spring the spring constant remains same  

for a given spring its spring constant does not change if the extension or compression is small comparable to its natural length

spring constant is inversely proportional to  its length. it means if the given spring with spring constant k is cut into two parts then the spring constant of each part will be 2k.

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