Question

Answer 1

a, \(P=U.I=36.0,8=28,8W\)

\(=>R=\dfrac{U}{I}=\dfrac{36}{0,8}=45\left(ôm\right)\)

b,\(=>I=\dfrac{U}{R}=\dfrac{9}{45}=0,2A\)

\(=>P=U.I=0,2.9=1,8W\)

Answer 2

đáp án đây nhé:
 

a, 

=I=UR=945=0,2A=I=UR=945=0,2A