Physics Exam 2

What is the equation for I_max?

I_max = E/R

What is the equation for Q_max?

Q_max = ExC

For EM waves, what is the ratio E₀/B₀ equal to?

c

What is the formula for intensity?

I = P/A (P = power)

What is the formula for centripetal acceleration?

V²/R

What is the formula for acceleration due to a magnetic field?

F_B/m

What is the formula for a magnetic moment?

u = IxA

What is the direction of a magnetic moment?

The same as the B_ext it creates.

What’s the equation for power?

P = Fxv (v = velocity)

What is the equation for radius of a particle’s path in a magnetic field that has been accelerated by a potential difference?

r = sqrt(2mqxV)/qB (only sqrt the numerator)

What is the equation for V_parallel?

V_parallel = sqrt((V_total² - (V_{perpendicular)}²)

If I am doing Kirchoff’s Loop equations, and my current goes from + to - battery, what equation do I use?

-V

If I am doing Kirchoff’s Loop equations, and I am going w/o the current through a resistor, what equation do I use?

+IR