a) Ta có R\(_1\) nt R\(_2\) nt R\(_3\)
R\(_{tđ}\) = R\(_1\) + R\(_2\) + R\(_3\) = 3 + 2.5 + 4.5 = 10 ( ôm)
b) Ta có: I\(_1\) = I\(_2\) = I\(_3\) ( ĐM nối tiếp)
U\(_1\)= I*R= 0.6 * 3 = 1.8 (V)
U\(_2\)= I *R = 0.6 * 2.5 = 1.5 (V)
U\(_3\)= I* R = 0.6 * 4.5= 2.7 (V)
U= U\(_3\) + U\(_1\)\(\) + U\(_2\)= 2.7+ 1.8 + 1.5 = 6 (V)