How much pressure is there in a five meter drop?

50 Pa.

P = density of water multiplied by the acceleration due to gravity multiplied by the height difference. Pressure P = density (density of water is 1 g/cm^3 = 10^3 kg/m^3) x height xg (acceleration of gravity) = 1000x9x9.8=88.x1000=8.8x10 ^4. The height difference of three meters is 0.3 kilograms of water pressure, and the tap water pressure is generally 5 kilograms of 1 MP water pressure in a 3 water pipe, 4 points.

(1) The output power of the generator is P＝

(2) The current passing through the primary coil of the step-up transformer is

I1＝

According to the question, the power lost on the transmission circuit is

P line=P×5%=I22R line< /p>

We can obtain The current on the transmission line is I2＝

Thus, the primary coil of the step-up transformer The transformation ratio with respect to the secondary coil is

(3) Transform step-up output voltageator for

U2=n2

The voltage at both ends of the primary coil of the step-down transformer is

U3=U2- Line I2R = 1329 V

The output voltage of the step-down transformer is known, i.e. the user voltage U4 = 220 V, therefore the transformation ratio of the primary coil and the secondary coil of the 'step-down transformer is

Answer:

(1) Generation power The output power of the machine is 2.5 × 104 W;

(2) The ratio of the number of turns of the primary and secondary coils of the step-up transformer is 1:4;

(3) The original number of turns of the step-down transformer. The turns ratio of the secondary coil is 6:1.