Select the correct answer.
2 answers:
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Answer:
Magnetic field,
Explanation:
Given that,
Velocity of electron,
It enters a region of space where perpendicular electric and a magnetic fields are present.
Magnitude of electric field,
We need to find the magnetic field will allow the electron to go through the region without being deflected.
Magnetic force on the electron, .......(1)
Electric force on the electron, F = q E........(2)
From equation (1) and (2) we get:
B = 0.0002 T
or
Hence, this is the required solution.
If we have the angle and magnitude of a vector A we can find its Cartesian components using the following formula
Where | A | is the magnitude of the vector and is the angle that it forms with the x axis in the opposite direction to the hands of the clock.
In this problem we know the value of Ax and Ay and we need the angle .
Vector A is in the 4th quadrant
So:
So:
So:
= -47.28 ° +360° = 313 °
= 313 °
Option 4.