If a 100-ohm resistor is connected across...

Question 1 of 27070oY2DdCHTpxEAT2bmMe0J

If a 100-ohm resistor is connected across 200 volts, what is the current through the resistor?

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Question 1 of 27070

Q

If a 100-ohm resistor is connected across 200 volts, what is the current through the resistor?

🔍 Key Concepts

• Ohm’s Law relationship between voltage (E or V), current (I), and resistance (R) • How to rearrange the formula to solve for current when you know voltage and resistance • Reasonableness check: compare your calculated current to the size of the resistance and voltage

💭 Think About

• Write down Ohm’s Law and solve it for current (I). What do you divide by what? • Substitute 200 volts and 100 ohms into your formula. What number do you get for current? • Look at the answer choices: which ones are clearly unrealistic for a simple 200 V, 100 Ω circuit?

✅ Before You Answer

• Be sure you are using I = V / R (current equals voltage divided by resistance) • Check that your calculator work gives a result in amperes (A), not volts or ohms • Verify that a larger resistance should mean smaller current, so extremely large currents are unlikely here