Related InterviewSolutions

• The dimensions of \(\frac{1}{2}\varepsilon_0E^2\) where \(\varepsilon_0\) is permittivity of free space and E is electric field is(A) ML2T2(B) MET2(C) ML-21-1(D) MLT-1
• Define Electrostatic Potential energy of a system of charges. 
• What is the SI unit of Electric Potential?
• Comparison of the variation of electric potential with distance between a point charge and an electric dipole.
• Explain why Electrostatic potential is constant throughout the volume. 
• Explain why Electric charges always reside on the surface of a charge conductor. 
• We know that electric field is discontinuous across the surface of a charged conductor. Is electric potential also discontinuous there?What meaning would you give to the capacitance of a single Conductor?
• A man fixes outside his house one evening a two-metre high insulating slab carrying on its top a large aluminium sheet of area 1m2. Will he get an electric shock if he touches the metal sheet next morning?
• What are the forms of energy into which the electrical energy of the atmosphere is dissipated during a lightning?(Hint: The earth has an electric field of about 100 Vm1 at its surface in the downward direction, corresponding to a surface charge density = -10-9 Cm-2. Due to the slight conductivity of the atmosphere upto about 50 km (beyond which it is good conductor), about +1800 C is pumped every second into the earth as a whole. The earth, however, does hot get discharged since thunderstorms and lightening occurring continually all over the globe pump an equal amount of negative charge on the earth).
• The discharging current in the atmosphere due to the small conductivity of air is known to be 1800 A on an average over the globe. Why then does the atmosphere not discharge itself completely in due course and become electrically neutral? In other words, what keeps the atmosphere charged?