Question 1 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19d3c273b230584979bc7.jpg' /> In the above diagram, the resistors $R_{1},R_{2},R_{3}$ have the values 5 Ω, 10 Ω, 30 Ω, respectively, which have been connected to a battery of 12 V. Calculate the current through $R_{3}$ .

Question 2 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19cda273b230584979b55.JPG ' /> In the above electric circuit, find out the power dissipated in $4\Omega$ resistor .

Question 3 :
A copper wire has diameter 0.5 mm, resistance 10Ω and resistivity $1.6×10^{-8}Ω$m.How much does the resistance change if the diameter is doubled?

Question 4 :
In an electrical circuit two resistors of $2\Omega \ and \ 4\Omega$ respectively are connected in series to a 6 V battery. The heat dissipated by the $4\Omega$ resistor in 5 s will be

Question 5 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19cd9273b230584979b54.JPG ' /> In the above electric circuit, find out the potential difference across $4\Omega$ resistance .