A parallel-plate capacitor is connected to a battery and becomes fully charged. The battery is then disconnected. (a) Explain what happens to the stored energy if the plates are moved farther apart.(b) What happens to the voltage across the plates?(c) Would your answers change if the battery remained connected? Explain why or why not.
Read DetailsTwo point charges are located on the x-axis: q1=+3.0 μCq_1 = +3.0\,\mu\text{C} at x=0 mx = 0 \,\text{m} q2=−2.0 μCq_2 = -2.0\,\mu\text{C} at x=0.40 mx = 0.40\,\text{m} (a) Calculate the electric potential at point PP located at x=0.20 mx = 0.20\,\text{m}.(b) A +1.0 μC+1.0\,\mu\text{C} test charge is placed at point PP. What is its potential energy?(c) How much work would be required to bring the test charge from infinity to point PP?
Read DetailsA charged particle enters a uniform magnetic field moving perpendicular to the field lines. (a) Describe the shape of the particle’s path and explain why it follows that path.(b) How would increasing the speed of the particle affect the motion?(c) What happens to the particle’s motion if its charge is reversed?
Read DetailsA 10.0 μF10.0\,\mu\text{F} capacitor is connected in series with a 5.0 kΩ5.0\,\text{k}\Omega resistor and a 12.0 V12.0\,\text{V} battery. (a) Calculate the time constant τ\tau for the circuit.(b) What is the voltage across the capacitor after 2.0 s2.0\,\text{s} of charging?(c) How much charge is on the capacitor at that time?
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