1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Troyanec [42]
3 years ago
9

Determine the velocity of a beam of electrons that goes undeflected when moving perpendicular to an electric and magnetic field.

The electric field and the magnetic field are also perpendicular to each other and have magnitudes 7.7 x 10^3 V/m and 7.5 x 10^-3 T , respectively.
a. What is the radius of the electron orbit if the electric field is turned off?
Physics
1 answer:
maks197457 [2]3 years ago
7 0

Answer:

r = 7.8 × 10 ⁻⁴ m

Explanation:

Given: Electric field E = 7.7 x 10^3 V/m, Magnetic field = 7.5 x 10^-3 T

as |E| = |V| x |B|

⇒  |V| = 7.7 x 10^3 V/m / 7.5 x 10^-3 T = 1.03×10⁶ m/s

Formula for this question is F = qE + qVB  

⇒ F = q VB, ( as Electric component is zero)

the acceleration a = v²/r  and also a = F/m   ( r=radius of curvature) so

so qVB/m = v²/r      

⇒ r = mV/qB

r= (9.11 × 10 ⁻³¹ kg x 1.03×10⁶ m/s) / (1.6 × 10 ⁻¹⁹ C x 7.5 x 10⁻³ T)

r = 7.8 × 10 ⁻⁴ m

You might be interested in
Henrietta is going off to her physics class, jogging down the sidewalk at a speed of 2.70 m/s. Her husband Bruce suddenly realiz
Katen [24]

Answer:

The velocity is v  =  6.66 \  m/s

Henrietta is at distance s=  18.17 \  m from the under the window

Explanation:

From the question we are told that

The speed of Henrietta is v=  2.70 \ m/s

The height of the window from the ground is h  =  36.5 \  m

Generally the time taken for the lunch to reach the ground assuming it fell directly under the window is

t  =  \sqrt{\frac{2 *  h }{g} }

=> t  =  \sqrt{\frac{2 *  36.5 }{9,8} }

=> t  =  2.73 \  s

Generally the time taken for the lunch to reach Henrietta is mathematically represented as

T =  t +  t_1

Here t_1 is the time duration that elapsed after Henrietta has passed below the window the value is given as 4 s

Now

T = 2.73  +  4

=> T = 6.73 \  s

Generally the distance covered by Henrietta before catching her lunch is

s=  v  *  T

=> s=  2.70  * 6.73

=> s=  18.17 \  m

Generally the speed with which Bruce threw her lunch is mathematically represented as

v  =  \frac{18.17}{2.73}

v  =  6.66 \  m/s

4 0
3 years ago
Point charges of 21.0 μC and 47.0 μC are placed 0.500 m apart. (a) At what point (in m) along the line connecting them is the el
rewona [7]

Answer:

a) x = 0.200 m

b)E = 3.84*10^{-4} N/C

Explanation:

q_1 = 21.0\mu C

q_1 = 47.0\mu C

DISTANCE BETWEEN BOTH POINT CHARGE = 0.5 m

by relation for electric field we have following relation

E = \frac{kq}{x}^2

according to question E = 0

FROM FIGURE

x is the distance from left point charge where electric field is zero

\frac{k21}{x}^2 = \frac{k47}{0.5-x}^2

solving for x we get

\frac{0.5}{x} = 1+ \sqrt{\frac{47}{21}}

x = 0.200 m

b)electric field at half way mean x =0.25

E =\frac{k*21*10^{-6}}{0.25^2} -\frac{k*47*10^{-6}}{0.25^2}

E = 3.84*10^{-4} N/C

6 0
3 years ago
Read 2 more answers
An open-topped freight car with mass 24,000 kg is coasting without friction along a level track. It is raining very hard, and th
skelet666 [1.2K]

Answer:

(a) v = 3..6 m/s

(b) The rain falling downward has been able to affect the horizontal motion of the car by reducing it's velocity from 4 m/s to 3.6 m/s.

Explanation:

from the question we have the following:

mass of the car (Mc) = 24,000 kg

initial velocity of the car (u) = 4 m/s

mass of water (Mw) = 3000 kg

final velocity of the car (v) = ?

(a) we can calculate the final momentum of the car by applying the conservation of momentum where

initial momentum = final momentum

Mc x U = (Mc + Mw) x V

24000 x 4 = (24000 + 3000) x v

96,000 = 27000v

v =3.6 m/s

(b) The rain falling downward has been able to affect the horizontal motion of the car by reducing it's velocity from 4 m/s to 3.6 m/s.

7 0
3 years ago
Make a general statement about what happens to light as it enters a different medium.
Aleksandr-060686 [28]

Answer:

Refraction is an effect that occurs when a light wave, incident at an angle away from the normal, passes a boundary from one medium into another in which there is a change in velocity of the light. The wavelength decreases as the light enters the medium and the light wave changes direction.

Explanation:

4 0
3 years ago
Bernini's sculpture apollo and daphne implies motion. what kind of motion is being depicted?
gladu [14]
Bernini's sculpture "Apollo and Daphne" implies a chase scene motion. Apollo and Daphne<span> is a life-sized Baroque marble </span>sculpture<span> by Italian artist Gian Lorenzo </span>Bernini<span>, executed between 1622 and 1625. Hope this answers the question. Have a nice day.</span>
5 0
3 years ago
Other questions:
  • TRUE OR FALSE: The following drops were most likely dropped from a 90 degree angle.
    6·2 answers
  • The journey of an electron through an external circuit involves a long and slow zigzag path that is characterized by losses in e
    13·1 answer
  • Which characteristics is common in mature rivers river
    7·2 answers
  • A certain car traveling in a straight line path has a velocity of +10.0 m/s at some instant. after 3.00 s, its velocity is +6.00
    12·1 answer
  • If the decomposition of hydrogen peroxide is a first order reaction and it takes 20.0 minutes for the initial concentration to f
    6·1 answer
  • A car moving with a velocity 15m/s and accelerating by 5m/s² attempts to reach a car moving with 30 m/s velocity.What distance s
    14·1 answer
  • A pot of water is heated on a gas-flame stove and begins to boil. Which two
    14·2 answers
  • Hdkshshgsksisbsgshsbisheghs be iwhghhfhjdjjh
    11·1 answer
  • What changes into energy in the sun?
    14·1 answer
  • From eight weeks after conception until birth, the developing fertilized egg is called an
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!