Hello aspirant

Following are some questions which you can try:-

1. In a Wheatstone’s bridge P = 100 Ω, Q = 1000 Ω and R = 40 Ω. If the galvanometer shows zero deflection, determine the value of S.

2. What is the value of x when the Wheatstone’s network is balanced?

P = 500 Ω, Q = 800 Ω, R = x + 400, S = 1000 Ω

You can download this pdf and view more questions for practice other than these

https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.larberthigh.com/_documents/%255B25367%255D3._H_Wheatstone_Bridges_Questions.pdf&ved=2ahUKEwjr8d3LqZ_nAhUByzgGHSfRCuoQFjAdegQIAxAB&usg=AOvVaw1whmP_Q-20XTHFDZ6CmNNx&cshid=1579975283303

Also ncert exemplar has many questions for practice for 12th class https://www.learncbse.in/ncert-exemplar-problems-class-12-physics-current-electricity/

Hope this helps