Page 463 - Physics Coursebook 2015 (A level)
P. 463
Learning outcomes
You should be able to:
■■ measure frequency and voltage using a cathode-ray oscilloscope
■■ describe an alternating current or voltage in terms of period, frequency, peak value and r.m.s. value
■■ relate r.m.s. and peak values for sinusoidal currents
■■ solve problems involving transformers
■■ explain the benefits of transmission of electrical energy
at high voltages
■■ explain how diodes and capacitors can be used to
produce rectified, smoothed currents and voltages
Chapter 29:
Alternating currents
451
