Calculation of Current Change
Ideal Transformer
Non-ideal transformer
Vp = input (primary) potential difference
Vs = output (secondary) potential difference
Ip = input (primary) current
Is = output (secondary) current
Ideal Transformer
Non-ideal transformer
Vp = input (primary) potential difference
Vs = output (secondary) potential difference
Ip = input (primary) current
Is = output (secondary) current
There are 2 types of transformer, namely
Direct Current | Alternating Current | |
Effects on a bulb | The bulb lights up | The bulb lights up |
Effects on a capacitor | Current is detected at the very beginning and then ceased to become zero afterward. | Current is detected |
Effects on moving coil loudspeaker | No sound produced | Sound produced |
Diagram above shows a graph of potential difference, V against time, t of an alternating current. Find the Vr.m.s. of the power supply.
Answer:
The diagram above shows the wave form of an a.c. supply. What is the root mean square value of the current?
Answer:
There are 2 principal laws of electromagnetic induction: