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ArbitrLikvidat [17]
3 years ago
14

Answer pls will give 20 points per person

Physics
2 answers:
LuckyWell [14K]3 years ago
7 0

Answer: question 1 is b I believe

Explanation:

every action has an opposite reaction

pogonyaev3 years ago
5 0

Answer:

Mscalculator is right it is "B" i took it on edge

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An electron moving in a direction perpendicular to a uniform magnetic field at a speed of 1.6 107 m/s undergoes an acceleration
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B = 0.024T positive z-direction

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In this case you consider that the direction of the motion of the electron, and the direction of the magnetic field are perpendicular.

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You solve for B from the equation (2):

B=\frac{ma}{qv}\\\\B=\frac{(9.1*10^{-31}kg)(7.0*10^{16}m/s^2)}{(1.6*10^{-19}C)(1.6*10^7m/s)}\\\\B=0.024T

The direction of the magnetic field is found by using the right hand rule.

The electron moves upward (+^j). To obtain a magnetic forces points to the positive x-direction (+^i), the direction of the magnetic field has to be to the positive z-direction (^k). In fact, you have:

-^j X ^i = ^k

Where the minus sign of the ^j is because of the negative charge of the electron.

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