← Back to Alternating Current

Average Current and RMS Current

Practice Questions:

Question 1: moderate

Match the following and choose the correct option from given codes :

1. i-p, ii-q, iii-r

2. i-q, ii-r, iii-p

3. i-q, ii-r, iii-q

4. None of these

View Answer

💬 Discuss this Question

Question 2: moderate

The r.m.s. value of potential difference V shown in the figure is :-

1. \[\frac{V_{0}}{\sqrt{3}}\]

2. \[V_{0}\]

3. \[\frac{V_{0}}{\sqrt{2}}\]

4. \[\frac{V_{0}}{{2}}\sqrt{\frac{5}{2}}\]

View Answer

💬 Discuss this Question

Question 3: moderate

A square wave current switching rapidly between \(+0.5\) ampere and \(-0.5\) ampere is passed through an A.C ammeter. Then the reading shown by it, is

1. 0.25 ampere

2. 0.5 ampere

3. \(\frac{0.5}{\sqrt{2}}\) ampere

\(0.5 \times \sqrt{2}\) ampere

View Answer

An AC ammeter measures the RMS value of the current. For a symmetric square wave of amplitude \(I_0\), the RMS value is equal to its peak value, \(I_{rms} = I_0 = 0.5\text{ A}\).

💬 Discuss this Question