A 20 A circuit has a design current of 18 A and voltage drop of . If its
circuit length is 25 m , what is the overall voltage drop ?
9.75 V
8.775
8.775 V
9.75

Ask by Flynn Sullivan. in Singapore

Jan 23,2025

Question

A 20 A circuit has a design current of 18 A and voltage drop of . If its
circuit length is 25 m , what is the overall voltage drop ?
9.75 V
8.775
8.775 V
9.75

Ask by Flynn Sullivan. in Singapore

Jan 23,2025

UpStudy AI · Accepted Answer

To calculate the overall voltage drop in the circuit, use the formula:

$$
\text{Voltage Drop} = I \times (\text{Voltage Drop per A per m}) \times \text{Length}
$$

Given:
- **Current (I)** = 18 A
- **Voltage Drop per A per m** = 19.5 mV/(A·m)
- **Length** = 25 m

Plugging in the values:

$$
\text{Voltage Drop} = 18 \, \text{A} \times 19.5 \, \text{mV/(A·m)} \times 25 \, \text{m}
$$

$$
\text{Voltage Drop} = 18 \times 19.5 \times 25 = 8775 \, \text{mV}
$$

Convert millivolts to volts:

$$
8775 \, \text{mV} = 8.775 \, \text{V}
$$

**Answer:** 8.775 V
The overall voltage drop is 8.775 V.