⚡ Ohm's Law and Resistance
This quiz explores the fundamental principles of current electricity, focusing on Ohm's law, resistance, and their practical applications in circuits. **What you'll learn:** - State and apply Ohm's law to solve circuit problems - Calculate resistance, current, and voltage using the relationship $V = IR$ - Understand factors affecting resistance in conductors - Analyze series and parallel circuits using resistance principles - Solve complex multi-step problems involving combined resistances
Questions in this quiz
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- Question 1
Which equation correctly represents Ohm's law?
- Question 2
If a current of 2 A flows through a resistor with resistance 5 Ω, the voltage across the resistor is ___ V.
- Question 3
Resistance in a conductor is directly proportional to its length and inversely proportional to its cross-sectional area.
- Question 4
A wire of length and cross-sectional area has resistivity . If the length is doubled while keeping area constant, how does the resistance change?
- Question 5
Three resistors of 2 Ω, 3 Ω, and 5 Ω are connected in series. What is the total resistance?
- Question 6
Three identical resistors of ___ Ω each are connected in parallel. If the total resistance is 2 Ω, find the value of each resistor.
- Question 7
A resistor draws a current of 0.5 A when connected to a 12 V power supply. What is its resistance?
- Question 8
A copper wire and an iron wire of the same length and cross-sectional area are connected in series to a battery. Which wire has a higher voltage drop across it?
- Question 9
Two resistors of 6 Ω and 3 Ω are connected in parallel. The equivalent resistance is ___ Ω.
- Question 10
A circuit has a 20 Ω resistor in series with a parallel combination of 10 Ω and 10 Ω resistors, all connected to a 60 V supply. What is the total current supplied by the battery?