AC voltage applied to a resistorप्रतिरोधक पर लगाई गई ac वोल्टताAC voltage applied to a resistor

NCERT Fig 7.1 / 7.2 · Class 12 Physics · Chapter 7 · interactive diagram

Parts and what they mean

• AC source (ac स्रोत) — Gives v = vm sin ωt; vm is the peak (amplitude) and ω the angular frequency.
• Resistor R (प्रतिरोधक R) — Ohm’s law works for ac too: i = v/R at every instant, so im = vm/R.
• Current i (धारा i) — Its direction reverses every half cycle; average current over a cycle is zero.
• Voltage v = vm sin ωt (वोल्टता v = vm sin ωt) — Red curve: source voltage, peak vm.
• Current i = im sin ωt (धारा i = im sin ωt) — Blue curve: current, peak im = vm/R. Same phase as v.
• In phase (समान कला में) — v and i reach zero, maximum and minimum at the same instants — phase difference 0.
• Time axis (ωt) (समय अक्ष (ωt)) — One full cycle is ωt = 2π, i.e. time T = 2π/ω.

Original diagram drawn by Simple Learning Hub, based on NCERT Fig 7.1 / 7.2. Report a mistake