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A circuit contains a 1.5 volt battery and a bulb with a resistance of 3 ohms. Calculate the current.

Question 1 options:

0.5 amps

4.5 amps

4.5 volts

0.5 ohms

Question 2 (3 points)

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A 12 Volt car battery pushes charge through the headlight circuit resistance of 10 ohms. How much current is passing through the circuit?

Question 2 options:

120 volts

1.2 ohms

120 ohms

1.2 amps

Question 3 (3 points)

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If a toaster produces 12 ohms of resistance in a 120-volt circuit, what is the amount of current in the circuit?

Question 3 options:

1440

10 amps

10 ohms

1440 ohms

Question 4 (3 points)

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A subwoofer needs a household voltage of 110 V to push a current of 5.5 A through its coil. What is the resistance of the subwoofer?

Question 4 options:

605

20 volts

20 ohms

605 ohms

Question 5 (3 points)
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How much voltage would be necessary to generate 10 amps of current in a circuit that has 5 ohms of resistance?

Question 5 options:

50 ohms

2 volts

2 amps

50 volts

1 answer

Let's solve these questions one by one using Ohm's Law, which states:

\[ V = I \times R \]

Where:

  • \( V \) is voltage in volts (V),
  • \( I \) is current in amperes (A), and
  • \( R \) is resistance in ohms (Ω).

Question 1:

Given:

  • Voltage \( V = 1.5 \) volts
  • Resistance \( R = 3 \) ohms

Using Ohm's Law, we can solve for current \( I \): \[ I = \frac{V}{R} = \frac{1.5}{3} = 0.5 \text{ amps} \]

Correct Answer: 0.5 amps

Question 2:

Given:

  • Voltage \( V = 12 \) volts
  • Resistance \( R = 10 \) ohms

Using Ohm's Law: \[ I = \frac{V}{R} = \frac{12}{10} = 1.2 \text{ amps} \]

Correct Answer: 1.2 amps

Question 3:

Given:

  • Voltage \( V = 120 \) volts
  • Resistance \( R = 12 \) ohms

Using Ohm's Law: \[ I = \frac{V}{R} = \frac{120}{12} = 10 \text{ amps} \]

Correct Answer: 10 amps

Question 4:

Given:

  • Voltage \( V = 110 \) volts
  • Current \( I = 5.5 \) amps

Using Ohm's Law to find resistance \( R \): \[ R = \frac{V}{I} = \frac{110}{5.5} = 20 \text{ ohms} \]

Correct Answer: 20 ohms

Question 5:

Given:

  • Current \( I = 10 \) amps
  • Resistance \( R = 5 \) ohms

Using Ohm's Law to find voltage \( V \): \[ V = I \times R = 10 \times 5 = 50 \text{ volts} \]

Correct Answer: 50 volts

To summarize:

  1. 0.5 amps
  2. 1.2 amps
  3. 10 amps
  4. 20 ohms
  5. 50 volts