Question

Circuit
Resistance (ohms) Voltage (V)

1
0.5
20
2
0.5
40
3
0.25
40
4
0.25
60
UNIT 4
Non-Contact Forces
＞
LESSON 3
Electrical Properties, Conductors, and Insulators
Use the information in the table about four different electric circuits to answer the question.
Which circuit will have the greatest electric current?
(1 point)
• circuit 1|
• circuit 4
• circuit 2
• circuit

Answer 1

To determine which circuit has the greatest electric current, we can use Ohm's Law, which is defined as:

\[ I = \frac{V}{R} \]

where:
- \( I \) is the electric current,
- \( V \) is the voltage,
- \( R \) is the resistance.

Now we can calculate the current for each circuit using the provided values:

1. **Circuit 1:**
- Voltage (V) = 20V
- Resistance (R) = 0.5Ω
- Current (I) = \( \frac{20V}{0.5Ω} = 40A \)

2. **Circuit 2:**
- Voltage (V) = 40V
- Resistance (R) = 0.5Ω
- Current (I) = \( \frac{40V}{0.5Ω} = 80A \)

3. **Circuit 3:**
- Voltage (V) = 40V
- Resistance (R) = 0.25Ω
- Current (I) = \( \frac{40V}{0.25Ω} = 160A \)

4. **Circuit 4:**
- Voltage (V) = 60V
- Resistance (R) = 0.25Ω
- Current (I) = \( \frac{60V}{0.25Ω} = 240A \)

Now that we have calculated the current for each circuit:
- Circuit 1: **40A**
- Circuit 2: **80A**
- Circuit 3: **160A**
- Circuit 4: **240A**

The circuit with the greatest electric current is **Circuit 4** at **240A**.