What is a rivet? How are two metal plates joined by a rivet?

A table tennis ball covered with a conducting paint is suspended by a silk thread so that it hangs between tow metal plates. One plate is earthed, when the other plate is connected to a high voltage generator, what will happen to the ball.

An electron having charge e and mass m starts from the lower plate of two metallic plates separated by a distance d . If the potential difference between the plates is V , the time taken by the electron to reach the upper plate is given by .

Two vertical metallic plates carrying equal and opposite charges are kept parallel to each other like a parallel plate capacitor. A small spherical metal ball is suspended by a long insulated thread such that it hangs freely in the centre of the two metallic plates. The ball which is uncharged is taken slowly towards the positively charged plate and is made to touch that plate. Then the ball will

A parallel plate capacitor consists of two metal plates of area A and separation d . A slab of thickness t and electric constant K is inserted between the plates with its faces parallel to the plates and having the same surface area as that of the plates. Find the capacitance of the system. IF K=2 , for what value of t//d will the capacitance of the system be 3//2 times that of the air capacitor? Calculate the energy in the two cases and account for the energy change.

Two identical plates of different metals are joined to form a single plate whose thickness is double the thickness of each plate. If the coefficients of conductivity of each plate are 2 and 3 respectively, Then the conductivity of composite plate will be

A copper and a tungsten plate having a thickness sigma=2 mm eacha re riveted together so that at 0^@ C They form a flat bimetallic plate. Find the average radius of cuvature of this plate at t=200^@C . The coefficients of linear expansion for copper and tungsten are alpha_(cu)=1.7xx 10^-5//K and alpha_(W)=0.4xx10^(-5)//K , respectively.

Charges 2q and -3q are given to two identical metal plates of area of cross section A . the distance between the plates is d . Find the capacitance and potential difference between the plates.

The given figure shows a metal plate in the form of a trapezium. Calculate the area of the plate in sq. cm correct to one decimal plate.

There is a rectangular metal plate in which two cavities in the shape of rectangle and circle are made, as shown with dimensions. P and Q are the centres of these cavities. On heating the plate, which of the following quantities increases?

Two strips of metal are riveted together at their ends by four rivets, each of diameter 6mm. What is the maximum tension that can be exterted by the riveted strip if the shearing stress on the rivet is not to exceed 6.9 xx 10^(7) Pa ? Assume that each rivet is to carry one quarter of the load .