Field Theory Answers

an electron is sitting 10 cm away from a small object of charge -5nc it is let go and move away from the charge object when it reaches a distance of 15 cm away. find its speed

Water is forced out of a fire extinguisher by air pressure, as shown in Figure. How much gauge air pressure in the tank (above atmospheric) is required for the water jet to have a speed of 30.0 m/s when the water level in the tank is 0.500 m below the nozzle?

why is seeing if a magnet is magnetic by seeing if a magnet sticks to it a bad test?

If a person walks 4 metres in north direction and rotates 30 degree in West direction,
find his displacement ?

Calculate the number of coulombs of positive charge in 304 cm3 of (neutral) water. (Hint: A hydrogen atom contains one proton; an oxygen atom contains eight protons.)

While skydiving you let 35s pass before opening your parachute. How fast are you traveling

Discuss critically some of the differences in construction and use of a CRO with electrostatic and magnetic deflection.

Explain why mass is invariant under Lorentz transformations (boosts)
Thank you

Two large parallel metal plates are separated by a distance d=1cm with the upper plate being 200V positive with respect to the lower plate. An electron with initial velocity 10^6 m/s is released upwards at the center of the lower plate. Calculate the time of flight of the electron? What will be the velocity of the electron upon striking the upper plate? How much energy is conveyed to the upper plate?

A clock has charges on it’s circumference as shown in the figure. A charge of 1 coulomb is taken at the centre and radius is R. The net force on the charge having 1 coulomb has to be found out