Electricity

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The switch creates or breaks a conducting path between the battery and bulb. When the switch is ON, it completes the electric circuit allowing current to flow through the bulb, making it glow. When OF

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Given: Q = 300 C, t = 10 min = 600 s Using formula: I = Q/t I = 300 C ÷ 600 s = 0.5 A Therefore, the electric current is 0.5 amperes. This means 0.5 coulombs of charge flows through the wire every sec

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Electric current is the flow of electric charges through a conductor. It's measured as the amount of charge flowing through a cross-section per unit time (I = Q/t). Current flows due to potential diff

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Given: Q = 4 C, V = 15 V Using formula: W = VQ W = 15 V × 4 C = 60 J Therefore, 60 joules of work is done. This energy is provided by the battery to move the charges through the circuit against resist

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Voltmeter measures potential difference between two points, so it's connected in parallel to compare the 'electrical pressure' at those points. Ammeter measures current flowing through a component, so

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Given: I = 2 A, V = 24 V Using Ohm's law: R = V/I = 24V ÷ 2A = 12 Ω If voltage doubles to 48V: I = V/R = 48V ÷ 12Ω = 4 A Resistance remains constant (property of conductor), but current doubles when v

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Resistance is inversely proportional to cross-sectional area (R ∝ 1/A). A thicker wire has larger cross-sectional area, providing more space for electrons to flow. Like a wider road allows more traffi

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Given: l = 1 m, A = 0.01 mm² = 0.01×10⁻⁶ m², ρ = 100×10⁻⁶ Ωm Using formula: R = ρl/A R = (100×10⁻⁶ × 1) ÷ (0.01×10⁻⁶) R = 100×10⁻⁶ ÷ 10⁻⁸ = 10 Ω The nichrome wire has resistance of 10 ohms, suitable f