Faraday entered a big metallic cage supported on insulating pillars and then charged the cage by a powerful electric machine. He remains quite safe inside the cage. Do you believe on this happening?

2

(a)

A charge q is placed at the center of the line joining two equal charges(Q). show that the system of three charges will be in equilibrium, if q \(=-\frac { Q }{ 4 } \)

2

(a)

A 2m insulating slab with a large aluminum sheet of area 1m² on its top is fixed by a man outside his house one evening. Will he get an electric shock, if he touches the metal sheet next morning?

2

(a)

Guess a possible reason, why water has a much greater dielectric constant (= 80) than mica (= 6)?

2

(a)

Automobile ignition failure occurs in damp weather. Explain, why?

2

(a)