Electric Charges and Electric Force
Which scenario violates the law during the process of charging by rubbing a balloon against hair?
Particle numbers increase or decrease through frictional interaction, having an excess or resulting in neutral bodies.
Transferring from one to the other because they now carry different amounts.
Both retain their original charge due to the importance of electric neutrality.
When a third resistor is added in series to an existing series circuit with two resistors, how does this affect the total current in the circuit?
The total current decreases.
The total current increases.
The total current remains unchanged.
There's not enough information to determine the change in current.
If the separation distance between two point charges is halved, how does the magnitude of the electrostatic force between them change according to Coulomb's law?
It increases by a factor of four.
It doubles.
It decreases by a factor of four.
It halves.
If two objects are rubbed together and one becomes positively charged, what happens to the other object?
It becomes negatively charged.
It also becomes positively charged.
It remains neutral.
It loses mass.
If a balloon is rubbed against hair and sticks to a wall, what can be said about the charges involved?
New charges are created on both surfaces.
The balloon gains mass due to extra charge from the hair.
Charges are destroyed during the process.
They have been separated but the total charge is conserved.
What does the conservation of charge principle state about the total charge in an isolated system?
The total charge increases over time.
The total charge remains constant over time.
The total charge changes intermittently.
The total charge decreases over time.
How does a neutral metal sphere behave when a positively charged rod is brought near it without physically touching it?
It loses all its electrons to the ground.
It becomes uniformly negatively charged throughout.
It becomes uniformly positively charged throughout.
It becomes polarized with negative charge near the rod and positive charge on the far side.

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In an experiment with charged particles in uniform motion creating magnetic fields, what effect does doubling only one particle's velocity have on each created magnetic field according to classical physics?
There's no change in either magnetic field strength.
The respective magnetic field strength for that particle halves.
The respective magnetic field strength for that particle doubles.
Both magnetic field strengths double.
What does the conservation of charge principle state regarding isolated systems?
The total charges alternate between positive and negative values periodically.
The total charge remains constant.
The total charge increases over time.
The total charge decreases over time.
In a closed system where only electrons are transferred, what happens to the total charge after some electrons move from one object to another?
It remains the same.
It decreases.
It reverses sign.
It increases.