Convert
`6.92 xx 10^(-7)` m to micrometres and Angstroms

A negligible small current is passed through a wire of length 15 m and uniform cross section 6.0 xx 10^-7 m^2 and its resistance is measured to be 5.0 Omega . What is the resistivity of the material?

A photon of wavelength 4 xx 10 ^(-7) m strickes on metal surface, the work function of the metal being 2.13 eV. Calculate the velocity of the photoelectron (1 eV = 1. 6020 xx 10 ^(-19) J)

Calculate the electric potential at the surface of a gold nucleus. Given radius of nucleus = 6.6 xx 10^-15 m and atomic wight of gold is 79.

What is the drift velocity of electrons in a silver wire of length 1 m, area of cross-section 3.14 xx 10^-6m^2 and carrying a current of 10 A. Given, charge on electron = 1.6 xx 10^-19C , Avogadro number = 6.02 xx 10^23 atomic weight of silver = 108 and density of silver = 10.5 xx 10^3 kg m^-3 .

A uniform copper wire of mass 2.23xx10^(-3) kg carries a current of 1 A when 1.7 V is applied across it. Calculate its length and area of cross-section. If the wire is uniformly stretched to double its length, calculate the new resistance. Density of copper is 8.92xx10^(3) kg m^(-3) and resistivity is 1.7xx10^(-8) Omega m.

Electromagnetic waves of frequency 5 xx 10^(14) Hz are passed through a liquid.The wavelength of the waves in liquid is measured to be 4.5 xx 10^(-7) m . Calculate the wavelength of e.m. waves in vacuum,

The velocity of an e in excited state of H-atom is 1.093 xx 10^(6)m//s , what is the circumference of this orbit?