Simple A. C Circuit 2

Physics SSS3 First Term


Simple A. C Circuit

Performance Objectives

Students should be able to;

  1. Explain reactance and impedance
  2. Determine current in circuits containing resistance and capacitance.
  3. Determine power in an a.c circuit
  4. Determine currents in circuits containing resistance, inductance and capacitance.

Alternating Current


Direct current (DC) circuits involve current flowing in one direction. In alternating current (AC) circuits, instead of a constant voltage supplied by a battery, the voltage oscillates in a sine wave pattern, varying with time as V = Vo sin ωt.

In a household circuit, the frequency is 60 Hz. The angular frequency is related to the frequency, f, by ω = 2πfVo represents the maximum voltage, which in a household circuit in North America is about 170 volts. We talk of a household voltage of 120 volts, though; this number is a kind of average value of the.... View More

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