https://www.khanacademy.org/science/ap-physics-2/x0e2f5a2c:electric-circuits/x0e2f5a2c:current-resistivity-ohms-law/v/resistivity-and-conductivity 2023-09-10T17:11:17.624018169Z Resistivity and conductivity Let's look at the properties of materials that cause a resistor to resist the flow of current. Explore the principles of Ohm's law, resistance, and resistivity in electrical circuits. Understand how resistance is defined by voltage and current, and how it remains constant in Ohmic materials. Discover the factors that influence resistance, including the length, cross-sectional area, and material of a resistor. David SantoPietro video https://cdn.kastatic.org/googleusercontent/-RlW8oVnlZWWOXxxRFGIP8eQTs9MZL5s5D8ukkvjimXnLYaLbIYOgBrIyt0QZKF69KItib1LU4Ie6iVJcPr2iA_B Resistivity and conductivity Let's look at the properties of materials that cause a resistor to resist the flow of current. Explore the principles of Ohm's law, resistance, and resistivity in electrical circuits. Understand how resistance is defined by voltage and current, and how it remains constant in Ohmic materials. Discover the factors that influence resistance, including the length, cross-sectional area, and material of a resistor. https://cdn.kastatic.org/ka-youtube-converted/4rsswT_Rv1M.mp4/4rsswT_Rv1M.mp4 722 Resitance https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:electrical-quantities/x0e04e0cb682fb793:resitance/a/resistance-and-resistivity-ap1 2021-04-29T07:59:27Z Current, resistance, and resistivity review Review the key terms, equations, and skills related to current, resistance, and resistivity, including how to find the current direction and what resistance depends on. article https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:electrical-quantities/x0e04e0cb682fb793:resitance/e/factors-affecting-resistance-basic 2023-03-16T00:21:35.099724358Z Factors affecting resistance (basic) Let's practice some problems to better understand how resistance depends on factors related to the dimensions and the material of the conductor. exercise https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:electrical-quantities/x0e04e0cb682fb793:resitance/e/resistance-and-resistivity 2026-04-08T00:16:02.937952483Z Resistance and resistivity Resistance and resistivity exercise https://www.khanacademy.org/science/ap-physics-2/x0e2f5a2c:electric-circuits/x0e2f5a2c:current-resistivity-ohms-law/v/circuits-part-1 2024-05-29T15:10:23.071133296Z Ohm's law Ohm's Law is V = IR, where V = voltage, I = current, and R = resistance. Ohm's Law allows you to determine characteristics of a circuit, such as how much current is flowing through it, if you know the voltage of the battery in the circuit and how much resistance is in the circuit. Sal Khan video https://cdn.kastatic.org/ka_thumbnails_cache/b84a04ee-f19e-4ed0-aabf-21b4d0f8b903_1280_720_base.png Ohm's law Ohm's Law is V = IR, where V = voltage, I = current, and R = resistance. Ohm's Law allows you to determine characteristics of a circuit, such as how much current is flowing through it, if you know the voltage of the battery in the circuit and how much resistance is in the circuit. https://cdn.kastatic.org/ka-youtube-converted/F_vLWkkOETI.mp4/F_vLWkkOETI.mp4 587 Resitance https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:electrical-quantities/x0e04e0cb682fb793:resitance/v/solved-example-ohms-law-resistance 2026-04-15T05:40:45.550331962Z Solved example: Ohms law - Resistance Solved example Ohms law Khan Academy Pakistan video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Solved example: Ohms law - Resistance Solved example Ohms law https://cdn.kastatic.org/ka-youtube-converted/F1b6_d1grY8.mp4/F1b6_d1grY8.mp4 337 Resitance https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:electrical-quantities/x0e04e0cb682fb793:resitance/e/ohm-s-law-and-resistance 2021-04-29T07:58:54Z Ohm's law and resistance Let's practice some problems to better understand Ohm's law. exercise https://www.khanacademy.org/science/ap-physics-2/x0e2f5a2c:electric-circuits/x0e2f5a2c:current-resistivity-ohms-law/e/voltage-and-ohm-s-law-ap1 2025-02-02T07:53:56.460765089Z Calculating resistance, voltage, and current using Ohm's law Practice using Ohm's law to predict changes in electric potential difference, resistance, or current for a circuit component.  April Russell exercise https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:electrical-quantities/x0e04e0cb682fb793:resitance/v/ohm-s-law-graph-verifying-ohm-s-law 2026-05-11T04:40:42.021307954Z Ohm's law graph- verifying Ohm's law Ohm's law graph verifying Ohm's law Khan Academy Pakistan video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Ohm's law graph- verifying Ohm's law Ohm's law graph verifying Ohm's law https://cdn.kastatic.org/ka-youtube-converted/qpy_F6xOdYU.mp4/qpy_F6xOdYU.mp4 509 Resitance https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:electrical-quantities/x0e04e0cb682fb793:resitance/e/vi-graph-ohm-s-law 2026-04-08T00:36:09.500768563Z VI graph - Ohm's law Ohm's law graph Satrajit exercise https://www.khanacademy.org/science/electrical-engineering/ee-semiconductor-devices/ee-diode/v/ee-diode 2021-03-01T15:43:22Z Diode Introducing the diode as a circuit element. A diode conducts current in one direction but not the other. Willy McAllister video https://cdn.kastatic.org/googleusercontent/w6ljL9ckvB5wraG-KSBPtSdcg1vhZ_0ZQA6fCRIVVE4DWm_3p9PTZcyJ_QpuMrbSIo4qx_RU0MamKmDyz3xiD3Y Diode Introducing the diode as a circuit element. A diode conducts current in one direction but not the other. https://cdn.kastatic.org/ka-youtube-converted/0FbeUMPZFjU.mp4/0FbeUMPZFjU.mp4 660 Resitance https://www.khanacademy.org/science/electrical-engineering/ee-semiconductor-devices/ee-diode/a/ee-diode-circuit-element 2025-06-30T13:24:56.290137498Z Diode as a circuit element Diodes conduct current in one direction but not the other. We solve a diode circuit graphically by plotting a diode i-v curve and resistor to find the intersection. article