Answer: B = 1.69 T
Explanation: Given that the
Electron velocity V = 7.4 × 10^5 m/s
Force F = - 2 × 10^-13 N
Charge q = -1.602 x 10-19 C.
We are given the charge, its velocity, and the magnetic field strength and direction. We can thus use the equation F = qvB sin θ .
Since the electron is moving perpendicular to a magnetic field,
sin θ = sin 90 = 1, therefore
- 2 × 10^-13 = - 1.602×10^-19 × 7.4×10^5B
B = -2×10^-13/1.2×10^-13
B = 1.68708T
B = 1.69 T
Answer:
The separation of the two slits is = 1.5 ×
m
Explanation:
Wave length
= 630 nm = 0.63 mm
x = 35 mm
l = 2.8 m
Order of fringes (m) = 3
We know that the separation of the two slits is given by
![d = \frac{m \lambda \ l}{x}](https://tex.z-dn.net/?f=d%20%3D%20%5Cfrac%7Bm%20%5Clambda%20%5C%20l%7D%7Bx%7D)
Put all the values in above formula we get
![d = \frac{(0.63)(3)(2.8)}{(35)}](https://tex.z-dn.net/?f=d%20%3D%20%5Cfrac%7B%280.63%29%283%29%282.8%29%7D%7B%2835%29%7D)
d = 1.5 ×
m
Therefore the separation of the two slits is = 1.5 ×
m
An object with a constant pushing or pulling force is exerted on it is greater than the frictional force, than A. The object will accelerate.