Energy in Capacitors: A 12.0-V battery (potential source) is connected across a 6.00-µF air-filled capacitor.(a) How much energy can be stored this way?(b) How much excess charge is on each plate of the capacitor?
What will be an ideal response?
(a) 432 µJ (b) 72.0 µC
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A straight wire is bent into the shape shown. Determine the net magnetic force on the wire when the current I travels in the direction shown in the magnetic field 
.
A. 2IBL in the ?z direction B. 2IBL in the +z direction C. 4IBL in the +z direction D. 4IBL in the ?z direction E. zero
As measured in Earth's rest frame, a spaceship traveling at 0.964c takes 11.2 y to travel between planets. How long does the trip take as measured by someone on the spaceship?
A) 2.98 y B) 7.28 y C) 42.1 y D) 30.7 y
Intensity: A certain electromagnetic field traveling in vacuum has a maximum electric field of 1200 V/m. What is the maximum magnetic field of this wave? (c = 3.0 × 108 m/s)
A. 3.4 × 10-4 T B. 4.0 × 10-6 T C. 2.2 × 10-5 T D. 9.6 × 10-6 T E. 8.7 × 10-6 T
The Earth is closer to the Sun in January than in July, which accounts for the fact that the highest high tides in the Northern Hemisphere occur in
A) winter. B) spring. C) summer. D) none of the above