## sq-ch5-p12

NoQuestionQuestion 1(a) Sketch a graph of emf induced in an inductive coil against rate of change of current. What is the significance of the gradient?(b)…

## emf-vs-current

Question 1: (a) Sketch the graph of emf induced in an inductive coil against rate of change of current. What is the significance of the…

## work-in-a-resistance-is-ve

Question 2: (a) Current and voltage provided by an AC generator are sometimes negative and sometimes positive.(a) Explain why for an A.C generator connected to…

Question 3: What determines the gradient of a graph of inductive reactance against frequency? ANSWER Inductive reactance XL of an inductor is directly proportional to…

## frequency-and-reactance-of-inductor-and-capacitor

Question 4: How does doubling the frequency affect the reactance of (a) inductor (b) capacitor? ANSWER Doubling the frequency doubles the inductive reactance Doubling the…

## short-question-5

Question 5: If the peak values of a sine wave is 1000 volts, what is the effective value (Eff)? ANSWER The sine wave of an…

## unit-of-reactance

Question 6: Show that reactance in measured in ohms for both inductors and capacitors. ANSWER Inductive Reactance The opposition offered by an inductor to the…

## principle-of-ecg

Question 7: Describe the principle of ECG. ANSWER When heart beats, it produces a time varying voltage. ECG (electrocardiogram) is the record of the small…