Aparticular metal has a work function of 1.05 ev. a light is shined onto this metal with a corresponding wavelength of 324 nm. what is the maximum velocity of the photoelectrons produced? (hint: 1ev = 1.6022 x 10-19 j, mass of an electron = 9.11 x 10-31 kg)

Velocity of electron will be              

Explanation:

We have given work function of metal

Wavelength of the light

So energy is given by , here h is plank's constant and c is speed of light

So

For a metal we know that

So

Now kinetic energy is given by

So velocity of electron will be

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm.   the wire diameter is d = 0.9 mm.   the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a                                          

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2)   in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation: