Acosmic ray electron moves at 6.5 x 106 m/s perpendicular to the earth’s magnetic field at an altitude where field strength is 1.24 10-5 t. what is the radius (in meters) of the circular path the electron follows? the charge of an electron is 1.6 x 10-19 c and its mass is 9.11 x 10-31m. your answer should be a number with two decimal places, do not include the unit.

(2) (a) you have a simple circuit that consists of only a battery (δvbat=1.5v) and two resistors with resistance r1=10ω and r2=5ω, connected in series with each other. what is the current running through the battery? (b) you re-arrange your circuit so now r2 is attached in parallel to r1 rather than in series. what is the current running through the battery? (c) you add an additional resistor r3=7ω on the same branch as r2. what is the current running through the battery? (d) what is the power dissipated in r3?