BMST Electrical Circuits and Ohm's Law 2

Question 1

A circuit has a voltage of 24 V and a resistance of 8 Ω. What is the current?

Accepted Answer

3 A

Answer

Using Ohm's Law: I = V/R = 24/8 = 3 A.

Question 2

Two resistors of 6 Ω and 12 Ω are connected in parallel. What is the equivalent resistance?

Accepted Answer

4 Ω

Answer

For parallel resistors: 1/R = 1/6 + 1/12 = 3/12, so R = 4 Ω.

Question 3

A resistor dissipates 50 W of power when 5 A flows through it. What is the resistance?

Accepted Answer

2 Ω

Answer

Using P = I²R: R = P/I² = 50/25 = 2 Ω.

Question 4

Which component in a circuit is specifically designed to limit current flow?

Accepted Answer

Resistor

Answer

A resistor is designed to oppose and limit the flow of electric current in a circuit.

Question 5

If voltage across a resistor doubles while resistance stays the same, what happens to power dissipated?

Accepted Answer

It quadruples

Answer

Since P = V²/R, doubling V quadruples the power (2² = 4).

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