A coil is wound with 400 feet of No. 16...

Question 1 of 270705eccefa3bacbc34ba4d47eba

A coil is wound with 400 feet of No. 16 tinned copper wire and connected to a 12 volt battery. What is the current if the resistance per 1000 feet of No. 16 tinned copper wire is 4.26 ohms?

Back

Question 1 of 27070

Study area:

A coil is wound with 400 feet of No. 16 tinned copper wire and connected to a 12 volt battery. What is the current if the resistance per 1000 feet of No. 16 tinned copper wire is 4.26 ohms?

No Illustration

This question does not have an illustration

🔍 Key Concepts

• Use Ohm’s Law: the relationship between voltage (V), current (I), and resistance (R) • How to scale resistance per 1000 feet down to the actual length of wire used • Unit consistency when moving from feet to resistance and then to current

💭 Think About

• How do you find the total resistance of 400 feet of wire if you know the resistance per 1000 feet? What fraction of 1000 feet is 400 feet? • Once you know the total resistance, how does Ohm’s Law relate voltage, current, and resistance? Which form of the formula lets you solve for current? • After calculating the current, which answer choice is numerically closest to your result when rounded properly?

✅ Before You Answer

• First compute the total resistance for 400 feet using the given "per 1000 feet" value before using Ohm’s Law • Make sure you do not forget to multiply the resistance per 1000 feet by the correct fraction (400/1000) • Double-check your arithmetic when dividing voltage by resistance so the units work out to amperes (amps)