Calculate the total flux coming out from a closed surface enclosing a particle (`"_2^4He`). (Given : `e = 1.6 xxl0^-19C`)

Choose correct alternative. A wire carries a current of 1 A. The number of electrons passing though a cross section of wire per second is ( given : e = 1.6 xx 10^-19 C)

Calculate the K.E, P.E, Total energy and Binding energy of an artificial satellite of mass 2000kg orbiting at a height of 3600 km above the surface of the earth Given: G = 6.67 xx 10^-11 Nm^2//kg R= 6400 km= 6.4 xx 10^6 m M= 6 xx 10^24 kg m = 2000 kg h = 3600 km = 3.6 xx 10^6 m

The magnitude of current density in a copper wire is 500 A//cm^2 . If the number of free electrons per cm^3 of copper is 8.47 xx 10^22 , calculate the drift velocity of the electrons through the copper wire (charge on an e = 1.6 xx 10^-19 C).

Would the Bohr formula for the H- atom remain unchanged if proton had a charge (+4/3)e and electron a charge (-3/4)e , where e = 1.6xx10^-19C ? Give reasons for your answer.

A photon of wavelength 4 xx 10^-7 m strikes on metal surface, the work function of the metal being 2.15eV. Calculate The velocity of the Photoelectron. (1ev = 1.6020 xx 10^-19 J)

Calculate the escape velocity on the surface of the Moon given the amss and radius of the Moon to be 7.4xx10^22 kg and 1.74xx10^6 m respectively

An alpha particle (the nudeus of a helium atom) (with charge +2) is accelerated and moves in a vacuum tube with kinetic energy 10 MeV. It passes through a uniform magnetic field of 1.88T, and traces a circular path of radius 24.6cm. Obtain the mass of the alpha particle. [leV = 1.6 xx 10^-19 J , charge of electron = 1.6 xx 10^-19C ]

A current of 0.2 A passes through a metal wire for 20 seconds. Calculate the number of electrons passing through the cross section of the wire during this time. (The charge on an electron = 1.6 times 10^(-19) C)