Cho mạch điện r1 //r2//r3 Cho biết r1 =12 ôm , r2=18ôm ,r3=20ôm a) Tính điện trở tương đương của đoạn mạch b) tính cường độ dòng điện qua từng điện trở

When applying kirchhoff's rules, one of the essential steps is to mark each resistor with plus and minus signs to label how the electric potential changes from one end of the resistor to the other. the circuit in the drawing contains four resistors, each marked with the associated plus and minus signs. however, one resistor is marked incorrectly. which one is it?

The pressure proportional to the area a- inversely b- directly c- increase d-decrease

Which of the following are used in an electrochemical cell? a. electrodes b. electrolyte c. terminals d. all of the above