Embibe Experts Solutions for Chapter: Current Electricity, Exercise 1: COMEDK UGET 2014

Two resistances A and B have colour codes orange, blue, white and brown, red, green respectively. Then ratio of their resistances $R_{\mathrm{A}}:R_{\mathrm{B}}$ is

Several lamps of $50 \mathrm{W}$ and $100 \mathrm{V}$rating are available. How many of them can be connected in parallel across a battery of a $120 \mathrm{V}$ of internal resistance $10 \mathrm{\Omega }$, so that all bulbs glow in full power?

Two copper wires, one of length $1 \mathrm{m}$ and the other of length $9 \mathrm{m}$ have the same resistance. The diameters are in the ratio

$I$ and $V$ are respectively the current and voltage in a metal wire of resistance $R.$ The $I-V$ graph for the two different temperatures $T_1$ and $T_2$ are given, then

Which of the following is a correct statement?

he equivalent resistance of the circuit between $A$ and $B$ is