1. If the distance between two charges is doubled, what happens to the electrical force between them?
a. It will double
b. It will quadruple
c. It will half**
d. It will reduce by a magnitude of 4
2. Why do insulators resist the flow of electricity and heat?
a. They are made of materials that resist charges
b. They create opposing electric forces to reduce the motion of charges
c. They do not allow their valence electrons to move easily**
d. They cannot transfer heat due to their low heat capacity
3. Which of the following equations is almost identical to Coulombs Law?
a. Newton's Law of Gravitation
b. Newton's First Law**
c. The Static Friction equation
d. The Work Energy Theory
4. Why do most objects have to be charged by transferring electrons to and from the object?
a. Most objects are insulators and require manual transfer of electrons for charges
b. Friction is necessary to generate new charges in matter**
c. Most objects are electrically neutral because they have equal numbers of protons and electrons
d. Most objects have electrical imbalances that need to be corrected by transfers
5. What is the similarity between Coulomb's Law and the equation for electric fields
a. Both function only when you have multiple charges**
b. Coulomb's Law is found through a derivation of the electric field equation
c. The electric field equation can be found only in situations where Coulomb's Law is invalid
d. The electric field equation is the same as Coulomb's Law, just with only one charge
6. Where is the electric field the strongest?
a. Far away from the source charge
b. Only at one specific point in the field
c. Closest to the source charge**
d. The electric field remains the same at all locations
7. Kirchhoff's Current Law is derived from which fundamental Physics law?
a. The Law of Conservation of Mass**
b. Newton's Law of Gravitation
c. The Inverse Square Law
d. The Law of Conservation of Charge
8. Which of the following statements can be inferred from Kirchhoff's Voltage Law?
a. All of the voltage provided by the source will be used by all of the circuit elements**
b. All of the voltage provided by the source will be the product of the current and resistance
c. All of the voltage provided by the source is created by a chemical reaction
d. All of the voltage of the source must be less than the total required voltage of the circuit
9. A very common electrical hazard is plugging too many devices into a single outlet. This runs the risk of having too much electricity flowing though a single location, in this case, the primary plug.
If we assume all plugs are parallel circuits, we can use ___Coulomb's___ Law to explain why having too many plugs in a single socket would cause too much electricity to flow.
True**
False
PLS HELP!!
1. If the distance between two charges is doubled, what happens to the electrical force between them?
d. It will reduce by a FACTOR of 4
Q1 Q2 / D^2
3. Which of the following equations is almost identical to Coulombs Law?
a. Newton's Law of Gravitation
m1 m2 / D^2 AGAIN !!!~!
4 C
5. D
same but Q1 = 1
6. Correct for once !
try asking each question individually
All of your answers were right except for 8. And 9 was false.
1. If the distance between two charges is doubled, the electrical force between them will decrease. The correct answer is c. It will half.
To understand why, we can use Coulomb's Law, which states that the electrical force between two charges is inversely proportional to the square of the distance between them. Mathematically, it can be written as F = k * (q1 * q2) / r^2, where F is the electrical force, k is the electrostatic constant, q1 and q2 are the charges, and r is the distance between them.
When the distance between the charges is doubled, the denominator in the equation becomes 4 times larger (2^2 = 4). Therefore, the force will be reduced by a factor of 1/4, which is equivalent to half.
2. Insulators resist the flow of electricity and heat because they do not allow their valence electrons to move easily. The correct answer is c. They do not allow their valence electrons to move easily.
In insulators, the electrons are tightly bound to their atoms and are not free to move and carry electric current. This lack of mobility makes it difficult for charges to flow through the material, leading to high electrical resistance. Similarly, the lack of freely moving electrons also makes it difficult for heat energy to transfer through the material, resulting in high thermal resistance.
3. The equation that is almost identical to Coulomb's Law is Newton's Law of Gravitation. The correct answer is a. Newton's Law of Gravitation.
Both Coulomb's Law and Newton's Law of Gravitation follow similar mathematical forms. Coulomb's Law describes the force between two charged particles, while Newton's Law of Gravitation describes the force between two massive objects. Both laws involve inverse square relationships, meaning the force decreases with the square of the distance between the objects.
4. Most objects have to be charged by transferring electrons to and from the object because most objects are electrically neutral due to having an equal number of protons and electrons. The correct answer is c. Most objects are electrically neutral because they have equal numbers of protons and electrons.
In order to charge an object, the number of electrons (negative charges) can be increased or decreased relative to the number of protons (positive charges) in the object. This can be achieved through processes such as friction, induction, or conduction. By transferring electrons to or from the object, an electrical imbalance is created, resulting in a charged object.
5. The similarity between Coulomb's Law and the equation for electric fields is that both function only when you have multiple charges. The correct answer is a. Both function only when you have multiple charges.
Coulomb's Law calculates the force between two charged objects, taking into account the magnitudes of the charges and the distance between them. The equation for electric fields, on the other hand, describes the electric field produced by a charge at a given point in space, taking into account the magnitude of the charge and the distance from it. Both equations involve interactions between charges, and they are related mathematically.
6. The electric field is the strongest closest to the source charge. The correct answer is c. Closest to the source charge.
The strength of the electric field decreases with increasing distance from the source charge. The electric field is strongest near the source charge because the force exerted by the charge is most intense in its immediate vicinity. As you move further away from the source charge, the influence of the charge diminishes, resulting in a weaker electric field.
7. Kirchhoff's Current Law is derived from the Law of Conservation of Charge. The correct answer is d. The Law of Conservation of Charge.
Kirchhoff's Current Law states that the total current flowing into a junction in a circuit is equal to the total current flowing out of the junction. This law is based on the principle of the conservation of charge, which states that charge cannot be created or destroyed; it can only be transferred or redistributed. Therefore, the total charge entering a junction must be equal to the total charge leaving the junction.
8. From Kirchhoff's Voltage Law, we can infer that all of the voltage provided by the source will be used by all of the circuit elements. The correct answer is a. All of the voltage provided by the source will be used by all of the circuit elements.
Kirchhoff's Voltage Law states that the sum of the voltages around a closed loop in a circuit is equal to zero. This implies that the total voltage provided by the source will be distributed across all the circuit elements. In an ideal circuit with no losses, all of the provided voltage will be used by the circuit elements.
9. The statement "If we assume all plugs are parallel circuits, we can use Coulomb's Law to explain why having too many plugs in a single socket would cause too much electricity to flow" is false.
Coulomb's Law is applicable to the force between two point charges and does not directly explain the behavior of electricity flowing through circuits. To understand the electrical behavior of circuits, other laws and principles such as Ohm's Law, Kirchhoff's Laws, and the concepts of current and resistance need to be considered. Plugging too many devices into a single outlet can cause excessive current flow and potentially overload the circuit, leading to electrical hazards.
7 D
8 B