Physics Answers

What is the force on na electron in an electric field of 200 N/C?

Show that low-frequency limit of Planck’s Law reduces to the Rayleigh-Jeans Law

and in the high-frequency limit reduces to Wien’s Law

Three point charges 10 C, -20 C, and -50 C are at the three consecutive corners of a square 10 cm on a side. What is the potential energy of the system?

A square coil RSTU of sides 5.0 cm carrying a current, I of 2.5 A is placed in a uniform magnetic field, B of 2.4 T.Calculate the torque on the coil.

Two long parallel wires, 12.0 cm apart are carrying current 1.8 A and 3.5 A respectively in the same directions. The magnetic field at the midpoint between both wires is 5.0 X 10^-8 T out of the page. If a proton moves with a velocity of 2.8 X 10⁵ m s-1 at the midpoint between the wires, determine the magnetic force acting on the proton.

Aircraft sometimes acquire small static charges. Suppose a supersonic jet has a 0.60 µC charge and flies 30ᵒ north of west at a speed of 660 m s-1 over the Earth’s south magnetic pole, where the 8.00 X 10-5 T magnetic field points straight up. Determine the magnetic force on the supersonic jet.

Find the magnitude of the charge if it has a Voltage of 13 V with a distance of 25 mm.

Find the Potential Energy of a charge with 96 μC with a potential difference of 14 V

Two-point charges reacted with each other to produce 4.32 x 10⁻⁴ J. the magnitude of q is 30 nC with a distance from the point charge of 19 cm. Find the magnitude of the point charge

Find the electric flux through a cylinder with a distance of 22 cm and a height of 35 cm with a charge of 5.42 μC. ( use the general formula of flux and the area of cylinder is 2𝜋rh + 2𝜋r²)