QUESTIONS

Judge the equivalent resistance when the following are connected in parallel $1 \Omega$  and ${10}^6 \Omega$.

Judge the equivalent resistance when the following are connected in parallel –
 $1 \Omega$, ${10}^3 \Omega$ and ${10}^6 \Omega$.

An electric lamp of $100 \Omega$, a toaster of resistance $50 \Omega$, and a water filter of resistance $500 \Omega$ are connected in parallel to a $220 \mathrm{V}$ source. What is the resistance of an electric iron connected to the same source that takes as much current as all three appliances, and what is the current through it?

What are the advantages of connecting electrical devices in parallel with the battery instead of connecting them in series?

How can three resistors of resistances $2 \Omega$, $3 \Omega$, and $6 \Omega$ be connected to give a total resistance of  $4 \Omega$?

How can three resistors of resistances $2 \Omega$, $3 \Omega$, and $6 \Omega$ be connected to give a total resistance of $1 \Omega$?

What is the highest total resistance that can be secured by combinations of four coils of resistance $4 \Omega , 8 \Omega , 12 \Omega , 24 \Omega$?

What is the lowest total resistance that can be secured by combinations of four coils of resistance $4 \Omega , 8 \Omega , 12 \Omega , 24 \Omega$?