If an AC circuit consists of a 220 mH inductor in series with a 75 k 
resistor and an AC generator with rms voltage of 12 V. At what frequency will the rms voltage drop across the resistor be equal to that across the inductor?
A. 114 kHz
B. 5.5 kHz
C. 875 Hz
D. 18 kHz
D. 18 kHz
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Astronaut Hans leaves Earth in a spaceship traveling at a speed of 0.280c relative to the observer Brian at rest on Earth
Hans is holding a pencil at an angle of 30° with the direction of travel, as seen by Hans. What angle does the pencil make with the direction of travel, as seen by Brian on Earth? A) 29° B) 30° C) 31° D) 33° E) 90°
A proton (mass = 1.67 × 10^-27 kg, charge = 1.60 × 10^-19 C) moves from point A to point B under the influence of an electrostatic force only. At point A the proton moves with a speed of 60 km/s. At point B the speed of the proton is 80 km/s. Determine the potential difference VB - VA
a. +15 V b. -15 V c. -33 V d. +33 V e. -20 V
What is the composition of the lunar regolith?
A. olivine and silicon dioxide B. silicon dioxide and anorthosite C. anorthosite and basalt D. basalt and olivine
A bar magnet moving with speed V passes below a stationary charge q. What can be said about the magnitude of the magnetic forces on the bar magnet (Fb) and on the charge q (Fq)