SKEE 1013 - Basic Laws

What is the correct formula for Ohm’s Law?

• V = I + R

• V = I × R

• V = I ÷ R

• V = R × I²

(KVL) In a closed loop, the total of all voltage sources is equal to:

• The sum of voltage drops

• The total current

• The sum of resistances

• The power in the circuit

At any junction, the sum of currents flowing into the junction is

• Zero

• Equal to the sum of currents flowing out

• Greater than the currents flowing out

• Less than the currents flowing out

If you increase the resistance in a circuit while keeping the voltage constant, what happens to the current?

• It decreases

• It increases

• It stays the same

• It doubles

If the voltage across a resistor is 10 V and the resistance is 5 Ω, what is the power dissipated?

• 10 W

• 20 W

• 25 W

• 50 W

Which statement is true for a parallel circuit?

• The total resistance is the sum of individual resistances

• The voltage is the same across all components

• The current is the same through all components

• None of the above

What happens to the total resistance when you add more resistors in parallel?

• It increases

• It decreases

• It stays the same

• It depends on the resistances

At a node, I1 = 2A enters, I2 = 3A enters, and I3 leaves. What is I3?

• 1 A

• 3 A

• 5 A

• 6 A

If one of the elements in a loop has an open circuit, KVL:

• Cannot be applied

• Still holds true, but current is zero

• Becomes invalid

• Gives infinite voltage

In a closed loop, the voltage drops are 5 V and 7 V, and the source voltage is 12 V. The KVL equation is satisfied because:

• 12 − (5 + 7) = 0

• 12 + (5 + 7) = 0

• 12 − 5 − 7 = −2

• (5 + 7) − 12 = 2