Calculate the velocity of sound propagating through a copper stick. [Given density of copper `=8.6 gm//cm^3`. `Y=11.8xx10^11"dyne".cm^2`]

A wire of unifrom cross section is made from 1g of copper whose resistance is 0.2 Omega Determine the length and cross sectional area of the wire. Given the density of copper =9g.cm^-3 and its resistivity =1.8 times 10^-6 Omega .cm.

A solenoid having 60 turns per cm is made of copper wire of radius 0.3 mm. The solenoid is 20 cm long and its diameter is 1 cm . If the two ends of the solenoid is connected to a battery of 5 V, determine the magnetic field produced at any point on the axis of the solenoid. Given, resistivity of copper =1.76xx10^(-8)Omega.m

Calculate the conductivity of a semiconductor having electron concentration 5xx10^(12)"cm"^(-3) and hole concentration 8xx10^(13)"cm"^(-3) [mu_(e)=2.3"V"^(-1).s^(-1)."m"^(2)" ""and"" " mu_(h)=0.1"V"^(-1).s^(-1)."m"^(2)]

The mass of copper metal is 6.432 gm and the density of copper is 7.6g.cm^-3 . What is the volume?

Calculate the radius of the 3^(rd) orbit in which electron has the velocity 1xx10^8 cm//sec .

When an iron wire of diameter 1 cm is copper plated uniformly. Resistance of iron reduces to 1/3 of its original value. Calculate the thickness of copper plating, Resistivities of copper and iron are 1.8 times 10^-6 Omega .cm and 1.98 times 10^-5 Omega .cm respectively.

A copper wire of cross-sectional area 1 mm^2 carries a current of 0.21A Find the drift velocity of free electrons. Given density of free electrons in copper =8.84 times 10^(24)m^-3 and electronic charge e=1.6 times 10^-19 C .

State Stokes' law. The terminal velocity of copper ball of radius 2.0 mm falling through a tank of oil at 20^@ C is 6.5 cm. s^-1 . Compute the coefficient of viscosity of the oil at 20^@ C . (Density of oil is 1.5xx10^3 kg.m^-3 , density of copper is 8.9xx10^3 kg. m^-3 )