Sub-topic 1
2024 · National Preliminary
Free
Current in a series circuit: true/false
Read past contest →
Sub-topic 2
2025 · National Preliminary
Premium
Equivalent resistance of two resistors in parallel, in series with a third
Read past contest →
Sub-topic 3
2003 · National Semifinal
Premium
Finding the second resistor needed for a given parallel-combination resistance
Read past contest →
Sub-topic 4
2003 · National Semifinal
Premium
Finding the second resistor needed for a given parallel-combination resistance
Read past contest →
Sub-topic 5
2012 · National Preliminary
Premium
Equivalent resistance of three equal resistors in parallel
Read past contest →
Sub-topic 6
2012 · National Preliminary
Premium
Equivalent voltage of identical batteries connected in parallel
Read past contest →
Sub-topic 7
2013 · National Preliminary
Premium
Current is equal at every point in a series circuit regardless of brightness
Read past contest →
Sub-topic 8
2013 · National Preliminary
Premium
The brighter lamp in series has the greater potential difference across it
Read past contest →
Sub-topic 9
2013 · National Preliminary
Premium
The brighter lamp in series has the higher resistance
Read past contest →
Sub-topic 10
2021 · National Preliminary
Premium
Equivalent resistance of a resistor in parallel with a series pair
Read past contest →
Sub-topic 11
2022 · National Preliminary
Premium
Equivalent resistance of three parallel resistors
Read past contest →
Sub-topic 12
2022 · National Preliminary
Premium
Voltage across a parallel resistor network from current and equivalent resistance
Read past contest →
Sub-topic 13
2023 · National Preliminary
Premium
True or false: series resistance of 20ω and 30ω is greater than 30ω
Read past contest →
Sub-topic 14
2023 · National Preliminary
Premium
True or false: parallel resistance of 20ω and 30ω is between 20ω and 30ω
Read past contest →
Sub-topic 15
2023 · National Preliminary
Premium
True or false: parallel resistance of 20ω and 30ω is at most 10ω
Read past contest →