Calculate the effective neutron capture radius of a nucleus having a cross section of 1.0 barn.

Calculate the conductance and conductivity of a wire of radius 0.01 Omega area of cross -section 10^(-4)m^(2) length 0.1m

What is the effect on resistance, if the area of cross section is increased.

Calculate the velocity of a neutron having de Broglie wavelength of 10 fermi. Mass of neutron, m_(n) = 1.7 xx 10^(-27)kg . Neglect the relative effects.

Calculate the electrical conductivity of the material of a conductor of length 3 m, area of cross-section 0.02 mm^(2) having a resistance of 2 Omega .

Calculate the electrical conductivity of the material of a conductor of length 3 m, area of cross- section 0.02 mm^(2) , having a resistance of 2 Omega .

Calculate the electrical conductivity of the material of a conductor of length 3m, area of cross section 0.2 mm^2 having a resistance of 2 ohm.

Derive an expression for the self-inductance of a toroid of circular crosssection of radius r and major radius R. Calculate the self inductance (L) of toroid for major radius(R) = 15 cm, crosssection of toroid having radius (r) = 2.0 cm and the number of turns (n) = 1200.