Embibe Experts Solutions for Chapter: Alternating Current, Exercise 1: BEGINNER'S BOX - 1

Explain why A.C. is more dangerous than D.C. ? 

Show that average heat produced during a cycle of AC is same as produced by DC with $I=I_{\mathrm{rms}}$ . 

An ordinary moving-coil ammeter used for $\mathrm{DC}$ cannot be used to measure $\mathrm{AC}$ even if its frequency is low. Why?

Find the time required for a $50 \mathrm{Hz}$ alternating current to change its value from zero to the RMS value.

The current and voltage in a circuit is given by, $i=3.5 \sin (628t+30°) \mathrm{A}, V=28 \sin (628t – 30°) \mathrm{V}$. Find time period of current.  

The current and voltage in a circuit is given by, $i=3.5 \sin (628t+30°) \mathrm{A}\text{,} V=28 \sin (628t – 30°) \mathrm{V}$.  The phase difference between voltage and current.