Lakhmir Singh and Manjit Kaur Solutions for Chapter: Electricity, Exercise 25: Questions Based on High Order Thinking Skills (HOTS)

A resistor of $8 \mathrm{ohms}$ is connected in parallel with another resistor $X$. The resultant resistance of the combination is $4.8 \mathrm{ohms}$. What is the value of the resistor $X$?

What is lowest resistance which can be obtained by combining four resistors having the following resistances?
$4 \mathrm{\Omega }, 8 \mathrm{\Omega }, 12 \mathrm{\Omega }, 24 \mathrm{\Omega }$

What is the resistance between $A$ and $B$ in the figure given below?

You are given one hundred $1 \mathrm{\Omega }$ resistors. What is the smallest and largest resistance you can make in a circuit using these?

You are supplied with a number of $100 \mathrm{\Omega }$ resistors. How could you combine some of these resistors to make a $250 \mathrm{\Omega }$ resistor?

The resistors $R_1, R_2, R_3$ and $R_4$ in the figure given below are all equal in value.

What would you expect the voltmeters $A, B$ and $C$ to read assuming that the connecting wires in the circuit have negligible resistance?

Four resistances of $16 \mathrm{ohms}$ each are connected in parallel. Four such combinations are connected in series. What is the total resistance?

If the lamps are both the same in the figure given below and if $A_1$ reads $0.50 \mathrm{A},$ what do $A_2, A_3, A_4$ and $A_5$ read?