Anegative charge q = − 3.20 × 10 ^− 6 c q=−3.20×10−6c is located at the origin and has velocity → v = ( 7.50 × 10 4 m / s ) ^ ı + ( − 4.90 × 10 4 m / s ) ^ ȷ v→=(7.50×10^4m/s)ı^+(−4.90×10^4m/s) ȷ^ . at this instant what is the magnetic field produced by this charge at the point x = 0.250 m x=0.250m , y = − 0.330 m y=−0.330m , z = 0 z=0 ?

Red light strikes a metal surface and electrons are ejected. if violet light is now used with a 10% greater intensity, what will happen to the ejection rate (number of ejected electrons per second) and the maximum energy of the electrons? a) greater ejection rate; same maximum energyb) same ejection rate; greater maximum energyc) greater ejection rate; greater maximum energyd) same ejection rate; same maximum energye) none of the above answers are correct

Select the three ways that the parallel-plate capacitor differs from a car battery.

If a negatively charged particle is placed at rest in an electric potential field that increases in the positive x-direction, what will the particle do? a. accelerate in the positive x-direction b. remain at rest c. accelerate in the negative x-direction