Embibe Experts Solutions for Chapter: Electric Current Through Conductors, Exercise 1: Exercise 1

A heating coil of resistance $100 \mathrm{\Omega }$ takes $100 \mathrm{s}$ to boil certain amount of water. If a similar heating coil is connected in series with the heating coil, then the time required to boil the water is $t_{\mathrm{s}}$, while $t_{\mathrm{p}}$ time is required to boil the same amount of water if the coils are connected in parallel. What will be $\frac{t_{\mathrm{s}}}{t_{\mathrm{p}}}$?

When a current flows through a conductor, its temperature

Which of the following statements is not true regarding a conductor?

The current $i$ through a given cross-section varies with time $t$ as $i=3+2 t$, where $i$ is in ampere and $t$ is in second. The charge passed through this cross-section during $t=0$ to $t=2 s$ is

Electric current is passing uniformly through a solid cylindrical wire of radius $R$. The current $i$ passing through circular cross-section of radius $r$ measured from the axis of the cylinder $(r<R)$ varies as shown in

Electric current has both magnitude and direction. It is a

A conductor carries a current of $1 \mathrm{A}.$ In $1 \mathrm{s}$ the charge that flows through any cross-section of conductor is

Two electric bulbs marked $25 \mathrm{W}-220 \mathrm{V}$ and $100 \mathrm{W}-220 \mathrm{V}$ are connected in series to a $440 \mathrm{V}$ supply. Which of the bulbs will fuse?