Answer:
Answer:
r=\dfrac{1}{B}\sqrt{\dfrac{2Vm}{e}}r=
B
1
e
2Vm
Explanation:
Let m and e are the mass and charge of an electron. It is accelerated from rest through a potential difference V and are then deflected by a magnetic field that is perpendicular to their velocity. Let v is the velocity of the electron. It can be calculated as :
\dfrac{1}{2}mv^2=eV
2
1
mv
2
=eV
v=\sqrt{\dfrac{2eV}{m}}v=
m
2eV
When the electron enters the magnetic field, the centripetal force is balanced by the magnetic force as :
\dfrac{mv^2}{r}=evB
r
mv
2
=evB
r=\dfrac{mv}{eB}r=
eB
mv
or
r=\dfrac{1}{B}\sqrt{\dfrac{2Vm}{e}}r=
B
1
e
2Vm
So, the radius of the resulting electron trajectory is \dfrac{1}{B}\sqrt{\dfrac{2Vm}{e}}
B
1
e
2Vm
. Hence, this is the required solution.
The answer is B electrons will be rubbed from one surface to another
The period of the pendulum is 8.2 s
Explanation:
The period of a simple pendulum is given by the equation:
where
L is the length of the pendulum
g is the acceleration of gravity
T is the period
We notice that the period of a pendulum does not depend at all on its mass, but only on its length.
For the pendulum in this problem, we have
L = 16.8 m
and
(acceleration of gravity)
Therefore the period of this pendulum is
#LearnWithBrainly
Answer:
Explanation:
distance of fan A = 18.3 m
distance of fan B = 127 m
speed of sound (s) = 343 m/s
What is the time difference between hearing the sound at the two locations?
time (T) = distance / speed
- time for sound to reach fan A = 18.3 / 343 = 0.053 s
- time it takes for sound to reach fan B = 127 / 343 = 0.370 s
- time difference = 0.370 - 0.053 = 0.317 s
Because they perform different functions