Electricity
Haryana Board · Class 10 · Science
Complete topic list for Electricity in Haryana Board Class 10 Science. Key concepts, sub-topics, and what to focus on for board exams.
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Electric Current and Circuit
- Electric current is the flow of electric charges through a conductor
- Current flows from positive terminal to negative terminal of a battery (conventional direction)
- Actual electron flow is opposite to conventional current direction
Electric Potential and Potential Difference
- Potential difference creates the 'electric pressure' that drives current flow
- Similar to water flowing due to height difference, charges flow due to potential difference
- Potential difference (V) = Work done (W) / Charge (Q)
Ohm's Law and Resistance
- Ohm's Law: V ∝ I, or V = IR (at constant temperature)
- Resistance (R) opposes the flow of current through a conductor
- R = V/I, where resistance is measured in ohms (Ω)
Factors Affecting Resistance
- Resistance depends on length (l), area of cross-section (A), and material
- R ∝ l (longer wire has more resistance)
- R ∝ 1/A (thicker wire has less resistance)
Key Concepts
Central concept: Electricity is the flow of electric charges through conductors, creating current that can be controlled and harnessed for various applications through circuits and components
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