In the circuit in the figure. R = 120, Ohm, L = 3.00 H, and Vemf = 40.0 V. After

Question

In the circuit in the figure. R = 120, Ohm, L = 3.00 H, and Vemf = 40.0 V. After the switch is closed, how long will it take the current in the inductor to reach 300. mA? he Earth is showered with particles from know as muons. They have a charge identical to that of an electron but are many times heavier (m = 1.88*10^-28 kg). Suppose a strong magnetic fields as established in a lab (B = 0.450 T) and a muon enters this field with a velocity of 3.25*10^6 m/s at a right angle to the field. What will be the radius of the muon's resulting orbit?

Explanation / Answer

8) Current equation in RL circuit

I = V/R ( 1 - e^-Rt/L)

0.3 = 40/120 (1 - e^-120t/3)

t = 0.057 s

9)Magnetic force = centripetal force

qvB = mv^2 / r

r = mv/qB

=1.88*10^-28 * 3.25*10^6 / 1.6*10^-19*0.45

= 0.00848 m

= 8.48 mm

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