NEET Exam > NEET Videos > Physics Class 12 > Ohm's Law and Resistance
Ohm's Law and Resistance Video Lecture | Physics Class 12 - NEET
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FAQs on Ohm's Law and Resistance Video Lecture - Physics Class 12 - NEET
| 1. What is Ohm's Law and how does it relate to resistance? |  |
Ans. Ohm's Law states that the current flowing through a conductor is directly proportional to the voltage across it and inversely proportional to the resistance of the conductor. In other words, it relates the three basic electrical quantities: current (I), voltage (V), and resistance (R). The equation for Ohm's Law is V = I * R, where V is voltage, I is current, and R is resistance.
| 2. How do you calculate resistance using Ohm's Law? | |
Ans. To calculate resistance using Ohm's Law, you need to rearrange the equation. The formula for calculating resistance is R = V / I, where R is resistance, V is voltage, and I is current. By knowing the values of voltage and current, you can easily determine the resistance of a conductor.
| 3. What factors affect resistance in a circuit? | |
Ans. Several factors can affect resistance in a circuit. These include the material of the conductor (different materials have different resistivities), the length of the conductor (longer conductors have higher resistance), the cross-sectional area of the conductor (thicker conductors have lower resistance), and the temperature of the conductor (resistance generally increases with temperature).
| 4. How does resistance impact the flow of current in a circuit? | |
Ans. Resistance impedes the flow of current in a circuit. According to Ohm's Law, as resistance increases, the current decreases, and vice versa. Higher resistance restricts the flow of electrons, resulting in a lower current. Conversely, lower resistance allows for a higher current to flow through the circuit.
| 5. What are some practical applications of Ohm's Law and resistance? | |
Ans. Ohm's Law and resistance have various practical applications in everyday life. They are used in designing and analyzing electrical circuits, determining appropriate wire gauges for specific applications, calculating power consumption, and troubleshooting electrical problems. Understanding Ohm's Law and resistance is essential for electrical engineers, technicians, and anyone working with electrical systems.
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Nov 21, 2024 Last updated |
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