A man inside an insulated metallic cage does not receive a shock, when the cage is highly charged. Explain, why.

A bird is in a wire cage hanging from a spring balance.Is the reading indicated on the balance,when the bird is flying out in the cage greater than ,less than or the same as that when the bird is sitting in the cage ?Explain.

Why does a gun recoil when a bullet is fired from the gun ? Explain.

Why does the paper strip open up when touched with a charged rod?

A charge is situated outside an unchanged hollow conductor experience a force if another charge B is placed inside the conductor, but B does not experience any force. Why? Does it not violate the third law of motion?

In a particular experiment, a high voltage is created by charging an isolated metal sphere as shown in the fig. The sphere has diameter 42 cm and any charge on its surface may be considered as if it were concentrated at its center. The air surrounding the sphere loses its insulating properties, causing a spark, when the electric field exceeds 20 kV cm^-1 . Calculate for the charged sphere when a spark is about to occur the charge on the sphere and its potential.

Faraday cage: A Faraday cage or Faraday shield lies an enclosure made of a conducting material. The fields within a conductor cancel out with any external fields, so the electric field within the enclosure is zero. These Faraday cages act as big hollow conductors you can put things in to shield them from electrical fields.Any electrical shocks the cage receives, pass harmlessly around the outside of the cage. An isolated point charge +q is placed inside the Faraday cage. Its surface must have charge equal to

Faraday cage: A Faraday cage or Faraday shield lies an enclosure made of a conducting material. The fields within a conductor cancel out with any external fields, so the electric field within the enclosure is zero. These Faraday cages act as big hollow conductors you can put things in to shield them from electrical fields.Any electrical shocks the cage receives, pass harmlessly around the outside of the cage. What is the electrical force inside a Faraday cage when it is struck by lightning?

Faraday cage: A Faraday cage or Faraday shield lies an enclosure made of a conducting material. The fields within a conductor cancel out with any external fields, so the electric field within the enclosure is zero. These Faraday cages act as big hollow conductors you can put things in to shield them from electrical fields.Any electrical shocks the cage receives, pass harmlessly around the outside of the cage. Example of a real world Faraday cage is