A beam of charged particles enters a magnetic field and travels in a helical or spiral path. What does the shape of the path ind
1 answer:
Answer:
B. The initial velocity has components both parallel and perpendicular to the magnetic field
Explanation:
A moving charged particle can be deflected by a magnetic field, only when some component of its velocity is perpendicular to the direction of the magnetic field.
A particle will move in a circular path when it has only one velocity component and it is perpendicular to the magnetic field. <em>If</em> the particle has a component that is parallel to the magnetic field, its magnitude and direction is not altered since ; The result is a circular orbit in the plane perpendicular to the magnetic field, and straight line motion parallel to the magnetic field—a helical path.
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Answer:
The friction force is 250 N
Explanation:
The desk is moving at constant velocity. This means that its acceleration is zero: a = 0. Newton's second law states that the resultant of the forces acting on the desk is equal to the product between mass (m) and acceleration (a):
In this case, we know that the acceleration is zero: a = 0, so also the resultant of the forces must be zero:
(1)
We are only interested in the forces acting along the horizontal direction, since it is the direction of motion. There are two forces acting in this direction:
- the pull, forward, F = 250 N
- the friction force, backward,
Given (1), we have
So the force of friction must be equal to the pull:
The apparent depth of an object at the bottom of a tank filled with a liquid of refractive index 1.3 is 7.7 cm. What is the actual depth of the liquid in the tank?
REFRACTIVE INDEX = 1.3
APPARENT DEPTH = 7.7 cm
REAL DEPTH OF THE OBJECT.
Refractive Index = 1.3
Apparent Depth = 7.7 cm
Putting the values in the formula:-