Question 1 :
Several electric bulbs designed to be used on a 220 V electric supply line, are rated 10 W. How many lamps can be connected in parallel with each other across the two wires of 220 V line if the maximum allowable current is 5 A?

Question 2 :
Calculate the power used in the 2 Ω resistor in the circuit containing a a 4 V battery in parallel with 12 Ω and 2 Ω resistors.

Question 3 :
100 J of heat is produced each second in a 4 Ω resistance. Find the potential difference across the resistor.

Question 4 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19d3f273b230584979bcb.jpg' /> In the above diagram, $R_{1}$= 10 Ω, $R_{2}$= 40 Ω, $R_{3}$ = 30 Ω, $R_{4}$= 20 Ω,$R_{5}$ = 60 Ω, and a 12 V battery is connected to the arrangement. Calculate the the total current flowing in the circuit.

Question 5 :
How is voltmeter connected in circuit to measure the potential difference between the two points?

Question 8 :
An circuit consist of a battery of three cells of 2V each , a $5\Omega$ resistor, an $8\Omega$ resistor, and a $12\Omega$ resistor and a plug key all connected in series. Also there is an ammeter to measure the current through resistors and voltmeter to measure the potential difference across $12\Omega$ resistor. What is the reading of the voltmeter?

Question 9 :
A piece of wire of resistance R is cut into five equal parts. These parts are then connected in parallel. If the equivalent resistance of this combination is R’, then what is the ratio $\frac{R}{R^{'}}$?