Recreational Vehicle (RV) Technician Practice Test

What is the current through a 4.7 k ohm resistor at 13.5 volts?

1. 2.9mA

2. 5.7mA

3. 10.0mA

4. 20.0mA

The correct answer is: 2.9mA

To determine the current flowing through a 4.7 k ohm resistor at 13.5 volts, Ohm's Law can be applied, which states that current (I) is equal to voltage (V) divided by resistance (R). Mathematically, this is represented as: I = V / R Here, the voltage is given as 13.5 volts and the resistance as 4.7 k ohms. Since 4.7 k ohms is equivalent to 4700 ohms, the calculation becomes: I = 13.5 V / 4700 Ω Calculating this gives: I = 0.00287 A To convert amperes into milliamperes (mA), you multiply by 1000: I = 0.00287 A * 1000 = 2.87 mA This result rounds to 2.9 mA, which aligns with the option provided. Therefore, the current through the 4.7 k ohm resistor at 13.5 volts is 2.9 mA, making this the correct answer.