Conservation Of Electric Charge And The Process Of Charging
A glass rod is rubbed with a piece of silk and acquires a charge of +12 nC. What is the charge on the silk after this process?
Two identical metal spheres carry charges of +10 μC and −4 μC. They are brought into contact and then separated. Determine the final charge on each sphere.
A positively charged rod is held near a neutral metal sphere without touching it. Which statement correctly describes the charge distribution on the sphere?
A metal sphere has a net charge of −5 μC. After a process, its charge becomes −2 μC. Calculate the number of electrons that crossed the sphere’s boundary.
A student wants to charge a metal sphere negatively using a positive rod and a ground connection. Which sequence of steps produces the intended result?
A negatively charged balloon is brought near a neutral wooden wall. The balloon sticks to the wall. Which explanation best accounts for this observation?
Three identical metal spheres, X, Y, and Z, carry charges of +9 μC, −3 μC, and +6 μC respectively. Sphere X is touched to Sphere Y, and they are separated. Then Sphere Y is touched to Sphere Z, and they are separated. Determine the final charge on Sphere Z.
A scientist claims that when a positively charged rod touches a neutral metal sphere, protons flow from the rod into the sphere. Which statement correctly evaluates this claim?
A negatively charged metal sphere is connected to Earth by a conducting wire. After equilibrium is reached, the wire is removed. What is the final charge on the sphere?
A system consists of two insulated objects with charges +7 μC and −3 μC. No charge enters or leaves the system. An internal process occurs. Which combination of final charges is possible?
An engineer needs to give a metal component a net positive charge using induction, but the only available charged object is a negative rod. Which procedure would achieve this?
A charged rod attracts a small, neutral piece of aluminum foil. A student claims this proves the foil must have the opposite charge to the rod. Evaluate this claim.
Two identical metal spheres each carry a charge of +8 μC. They are brought into contact and then separated. What is the final charge on each sphere?
During a thunderstorm, the base of a cloud accumulates negative charge directly above a tall metal antenna. The antenna is grounded. Which best describes the charge state of the antenna?
A rubber rod is rubbed with animal fur. The rod acquires a charge of −15 nC. A student calculates the number of electrons transferred. Which value is correct?
An insulating plastic comb is held near small pieces of neutral paper, and the paper pieces jump toward the comb. Compared to polarization of a metal object, what is the key difference in how the paper becomes polarized?