Pure resistance formula of grade three How many Zhejiang teachers are there Can we have a few more? Our teacher said a few more, then you will be deformed

Pure resistance formula of grade three How many Zhejiang teachers are there Can we have a few more? Our teacher said a few more, then you will be deformed

W = uit = u ^ 2 / R * t = I ^ 2 * RT there are only three in junior high school
The latter two are variations of Ohm's law
I am in Shenzhen, we learn 3, I think the country's junior high school is 3

What is the relationship between resistance and current voltage in parallel circuit

1. Characteristics of parallel circuit: (1) current: the total current is equal to the sum of branch currents
(2) Voltage: the voltage of each branch is equal
(3) Resistance: the more parallel branches, the smaller the total resistance. The total resistance is less than that of any branch
1 / R total = 1 / R1 + 1 / r2 +. + 1 / RN
That should be it

How to deduce the relation of resistance in series and parallel circuit
formula

In series circuit: u = U1 + u2i = I1 = I2 because: u = RI, so: RI = r1i1 + r2i1 two sides divided by I: get, r = R1 + R2 conclusion: in series circuit, the total resistance is equal to the sum of the electrical resistance. In series circuit: u = U1 = u2i = I1 + I2 because: I = u / R, so: U / r = U1 / R1 + U2 / r2 two sides divided by u, 1 / r = 1 / r2 + 1