Daily review: Formula & Equations for Ohm’s,…

Q: Which of the following is the correct mathematical expression for Ohm's Law?

V = I * R — Ohm's Law states that Voltage (V) is the product of current (I) and resistance (R).

Q: Kirchhoff’s Current Law (KCL) is based on the principle of conservation of:

Charge — KCL states that the algebraic sum of currents at a node is zero, which is based on the conservation of electric charge.

Q: In Coulomb’s Law, the force between two point charges is inversely proportional to:

The square of the distance between them — Coulomb's Law states F = k(q1*q2)/r^2, making the force inversely proportional to the square of the distance (r^2).

Q: Kirchhoff’s Voltage Law (KVL) states that the sum of voltages around any closed loop is:

Zero — KVL states that the directed sum of potential differences (voltages) around any closed loop is zero.

Q: If the resistance in a circuit is doubled while the voltage remains constant, what happens to the current?

It is halved — Since I = V/R, if R is doubled (2R), the current becomes V/(2R), which is half the original current.

Q: What does the 'k' represent in Coulomb's Law (F = k * q1 * q2 / r^2)?

Coulomb's constant — The 'k' is Coulomb's constant, approximately 8.99 x 10^9 N·m²/C².

Q: A node in a circuit has three currents entering with values 2A, 3A, and 5A. What is the sum of currents leaving the node?

10A — According to KCL, the sum of currents entering equals the sum leaving; 2 + 3 + 5 = 10A.

Q: Which of the following is equivalent to the unit of Resistance (Ohm)?

Volt/Ampere — From R = V/I, the unit is Volts per Ampere (V/A).

Q: If you increase the distance between two charges by a factor of 3, how does the electrostatic force change?

Decreases by 9 — Since F is proportional to 1/r^2, tripling the distance (3^2) results in the force becoming 1/9th of the original.

Q: Kirchhoff’s Voltage Law (KVL) is a direct consequence of the law of conservation of:

Energy — KVL is based on the conservation of energy, as potential difference represents energy per unit charge.

Question 1 of 10

Which of the following is the correct mathematical expression for Ohm's Law?

Ohm's Law states that Voltage (V) is the product of current (I) and resistance (R).

Question 2 of 10

Kirchhoff’s Current Law (KCL) is based on the principle of conservation of:

KCL states that the algebraic sum of currents at a node is zero, which is based on the conservation of electric charge.

Question 3 of 10

In Coulomb’s Law, the force between two point charges is inversely proportional to:

Coulomb's Law states F = k(q1*q2)/r^2, making the force inversely proportional to the square of the distance (r^2).

Question 4 of 10

Kirchhoff’s Voltage Law (KVL) states that the sum of voltages around any closed loop is:

KVL states that the directed sum of potential differences (voltages) around any closed loop is zero.

Question 5 of 10

If the resistance in a circuit is doubled while the voltage remains constant, what happens to the current?

Since I = V/R, if R is doubled (2R), the current becomes V/(2R), which is half the original current.

Question 6 of 10

What does the 'k' represent in Coulomb's Law (F = k * q1 * q2 / r^2)?

The 'k' is Coulomb's constant, approximately 8.99 x 10^9 N·m²/C².

Question 7 of 10

A node in a circuit has three currents entering with values 2A, 3A, and 5A. What is the sum of currents leaving the node?

According to KCL, the sum of currents entering equals the sum leaving; 2 + 3 + 5 = 10A.

Question 8 of 10

Which of the following is equivalent to the unit of Resistance (Ohm)?

From R = V/I, the unit is Volts per Ampere (V/A).

Question 9 of 10

If you increase the distance between two charges by a factor of 3, how does the electrostatic force change?

Since F is proportional to 1/r^2, tripling the distance (3^2) results in the force becoming 1/9th of the original.

Question 10 of 10

Kirchhoff’s Voltage Law (KVL) is a direct consequence of the law of conservation of:

KVL is based on the conservation of energy, as potential difference represents energy per unit charge.

Daily review: Formula & Equations for Ohm’s, Kirchhoff’s & Coulomb’s Laws Quiz