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melomori [17]
3 years ago
6

Which of the following fields push on a stationary electron?(A) electric and gravitational fields but not magnetic fields. (B) g

ravitational fields but not electric or magnetic fields. (C) electric, magnetic, and gravitational fields. (D) magnetic and gravitational fields but not electric fields.
Physics
2 answers:
ruslelena [56]3 years ago
8 0

Answer:

(A) electric and gravitational fields but not magnetic fields.

Explanation:

Let's analyze the effect produced by each of the three fields on the stationary electron:

- Gravitational force: the gravitational force exerted on the electron by a gravitational field is

F=mg

where

m is the mass of the electron

g is the strength of the gravitational field

Since the mass of the electron m is non-zero, the electron experiences a gravitational force.

- Electric field: the electric force exerted on the electron by an electric field is

F=qE

where

q is the charge of the electron

E is the magnitude of the electric field

Since the charge q of the electron is non-zero, the electron experiences an electric force.

- Magnetic field: the magnetic force exerted on the electron by a magnetic field is

F=qvBsin \theta

where

q is the electron charge

v is the velocity of the electron

B is the magnitude of the magnetic field

\theta is the angle between the direction of v and B

Since the electron is stationary, we notice that the velocity is zero: v=0, therefore the magnetic force is zero as well.

Therefore, the correct answer is

(A) electric and gravitational fields but not magnetic fields.

Crazy boy [7]3 years ago
8 0

Answer:

Which of the following exists around every object that has mass?

A.

a magnetic field

B.

magnetic poles

C.

a gravitational field

D.

electric charges

Explanation:

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