Year 9 Exam > Year 9 Videos > Year 9 Physics (Cambridge) > Voltage and Resistance
Voltage and Resistance Video Lecture | Year 9 Physics (Cambridge)
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13 videos|7 docs|8 tests
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FAQs on Voltage and Resistance Video Lecture - Year 9 Physics (Cambridge)
| 1. What is voltage? |  |
Ans. Voltage is the measure of the electric potential difference between two points in a circuit, representing the force that pushes electric charges through the circuit.
| 2. How is voltage measured? | |
Ans. Voltage is measured in volts using a voltmeter, which is connected across the points where the potential difference needs to be measured.
| 3. What is resistance? | |
Ans. Resistance is the measure of opposition to the flow of electric current in a circuit, caused by the material of the conductor and its dimensions.
| 4. How is resistance calculated in a circuit? | |
Ans. Resistance in a circuit is calculated using Ohm's Law, which states that resistance (R) equals the voltage (V) divided by the current (I), expressed as R = V/I.
| 5. How does resistance affect voltage in a circuit? | |
Ans. In a circuit, resistance causes a drop in voltage as current flows through it, leading to a decrease in the potential difference between points in the circuit.
About this Video
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Dec 22, 2024 Last updated |
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