Tham khảo tài liệu 'physics_test_bank_split_27', khoa học tự nhiên, vật lý phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Simpo PDF Merge and Split Unregistered Version - http 20. The equivalent resistance between points 1 and 2 of the circuit shown is 1Q 1Q AAA--------------- 1 1 Q S4 Q ------VA-------------Vv ------ 2 2 Q 2 Q A. 3 Q B. 4Q C. 5 Q D. 6Q E. 7 Q ans C 21. Each of the resistors in the diagram has a resistance of 12 Q. The resistance of the entire circuit is A. Q B. 25 Q C. 48 Q D. 120Q E. none of these ans B 22. The resistance of resistor 1 is twice the resistance of resistor 2. The two are connected in parallel and a potential difference is maintained across the combination. Then A. the current in 1 is twice that in 2 B. the current in 1 is half that in 2 C. the potential difference across 1 is twice that across 2 D. the potential difference across 1 is half that across 2 E. none of the above are true ans B Chapter 27 CIRCUITS 391 Simpo PDF Merge and Split Unregistered Version - http 23. The resistance of resistor 1 is twice the resistance of resistor 2. The two are connected in series and a potential difference is maintained across the combination. Then A. the current in 1 is twice that in 2 B. the current in 1 is half that in 2 C. the potential difference across 1 is twice that across 2 D. the potential difference across 1 is half that across 2 E. none of the ab ove are true ans C 24. Resistor 1 has twice the resistance of resistor 2. The two are connected in series and a potential difference is maintained across the combination. The rate of thermal energy generation in 1 is A. the same as that in 2 B. twice that in 2 C. half that in 2 D. four times that in 2 E. one-fourth that in 2 ans B 25. Resistor 1 has twice the resistance of resistor 2. The two are connected in parallel and a potential difference is maintained across the combination. The rate of thermal energy generation in 1 is A. the same as that in 2 B. twice that in 2 C. half that in 2 D. four times that in 2 E. one-fourth that in 2 ans C 26. The emf of a battery is .
