An electron in a vacuum is first accelerated by a voltage of 79900 v and then enters a region in which there is a uniform magnetic field of 0.364 t at right angles to the direction of the electron's motion. what is the force on the electron due to the magnetic field?

9.762 × 10⁻¹² N

Explanation:

Given:

Voltage, V = 79900 Volts

Magnetic field, B = 0.364 T

Now,

The energy (E) due to the applied potential difference,

E = eV

where,

e is the charge of the electron = 1.6 × 10⁻¹⁹ C

thus,

E = 1.6 × 10⁻¹⁹  × 79900 J

also,

kinetic energy due to the applied potential

K.E = (1/2)mv²

where, m is the mass of the electron

v is the velocity of the electron

also

E = K.E

thus we have

1.6 × 10⁻¹⁹  × 79900 J = (1/2) × 9.1 × 10⁻³¹ × v²

or

v = 1.676 × 10⁸ m/s

therefore,

The force in the electron, F = evB

or

F = 1.6 × 10⁻¹⁹ × 1.676 × 10⁸ × 0.364

or

F = 9.762 × 10⁻¹² N

adding a(n) to an electric circuit would increase the magnetic field around a wire;

b. solenoid

a solenoid is a type of electromagnet whose purpose is to generate a controlled magnetic field.

if the purpose of the solenoid is instead to impede changes in the electric current, a solenoid can be more specifically classified as an inductor rather than an electromagnet.

i had this question and the answer was 3.15 miles.

martina travels from school to her mom's office. from there, she walks to school. after school, she walks to the library and then to a friends house before finally ending back at home. find martina's total distance traveled.

a) 0 miles  

b) 0.4 miles  

c) 1 mile  

d) 3.15 miles