Generate Quiz 6997FF7CBF90D

A stationary electron is subjected to a powerful magnetic field. Because magnetic force acts on moving charges, the electron stays stationary.

In essence, TVs provide us with images by projecting electron beams onto a screen. However, placing a magnet close to a television would create a magnetic field that would cause the electron beam to change direction.

The quantity of magnetic field lines that flow through a surface is referred to as magnetic flux. The scalar product of surface area A and magnetic field B is known as magnetic flux.

ΦB = B ⋅ A = B A cos θ

Magnetic flux has no direction and only magnitude because it is a scalar quantity. Therefore, it is impossible to determine its “direction” by using any rules.

The SI unit for inductance is “Henry” (H). Both self and mutual inductance will have the same SI unit since they are both forms of inductance. Option C is therefore accurate.

AC motors transform electrical energy into mechanical energy, and AC generators transform mechanical energy into electrical energy.

Images of tumors and inflammatory tissues can be identified using MRI. Smear stain is used to identify blood cells, a microscope is used to identify skin cells, and X-rays are used to examine bone structures.

v=5.20 × 106 m/s B=1.30×10-4 T e/m=1.76×1011 C/kg

r=? evB=mv2/r
By changing the order: r=(v/B)÷(e/m)
r=5.20×106m/s /1.30×10-4 T ÷ 1.76×1011 C/kg r=22.7 cm
Therefore, the right response is A.

The right response is energy. A key idea in electromagnetism, Lenz’s law specifies the direction of an induced current in a conductor when it is exposed to a fluctuating magnetic field. Lenz’s law states that the induced current will flow in a direction that opposes the original magnetic field’s change by producing a magnetic field. Energy is converted as a result of this resistance to the magnetic field change, usually as mechanical work or electrical energy.