Electric Charges
What subatomic particle carries a negative electric charge?
Electron
What is the standard unit of electric charge used in Coulomb's Law?
Coulombs (C)
What is the SI unit of electrostatic force?
Newton (N)
Substances or materials do not transfer electric charge easily.
Insulators
What does the Greek word "ELEKTRON" mean, from which the word "electricity" is derived?
Amber
According to Coulomb's Law, what happens to the force between two charges if the distance between them is increased?
The force will decrease
Which of the following correctly states Coulomb's Law?
A. The electric force between two charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.
B. The electric force between two charges is directly proportional to the square of the charges and inversely proportional to the distance between them.
C. The electric force between two charges is directly proportional to the distance between them and inversely proportional to the product of the charges.
D. The electric force between two charges is independent of the distance between them
A. The electric force between two charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.
What is the SI unit of electric potential difference?
Volts
Atoms with a different number of electrons
What formula represents Coulomb’s Law?
F=KQ1Q2/r2
Two charges, Q1 and Q2, are placed at a distance r apart. If Q1 is positive and Q2 is negative, what is the nature of the force between them?
A. Repulsive
B. Attractive
C. Neutral
D. No force
Attractive
Material A has a higher electron affinity than material B. When charged by friction, which material will lose electrons?
Material B
What is the charge of an atom with 4 neutrons, 3 protons, and 1 electron?
+2 (2 protons)
If two charges exert a force of 10 N on each other when they are 2 meters apart, what will the force be when they are 1 meter apart?
A. 20 N
B. 40 N
C. 5 N
D. 80 N
B. 40N
What is the relationship between the magnitude of the electrostatic force and the distance between the charges?
They are inversely proportional
What is the current produced by a charge of 6.5 x 10^-18 C flowing in 15 seconds?
4.33 x 10^-19 A
What method of charging involves direct contact and the transfer of electrons?
Conduction
What is the value of the coulomb's constant?
8.99x10^9 Nm2/C2
What is the formula used for finding the distance r between to charges in electrostatic force.
r=√ Kq1q2/F
Which of the following is a characteristic of a parallel circuit? A. The current is the same through all components
B. The voltage is the same across all components
C. The resistance is the same through all components
D. None of the above
B. The voltage is the same across all components