Four equilateral triangles composed of six resistors, the resistor voltage is known, and the current

It is known that the three electric aberration early resistance resistances connected to the Y-shape are all 30, then the three resistance values of the δ shape are () virtual disturbance.

Correct answer: c

Since the three resistors are equal in magnitude, each resistor is 90 ohms when it is equivalent to a triangle circuit.

The three resistors connected to the Y-shape are all 30, so the resistance value of the three resistors of the equivalent shape is 30 3=90

If you connect three 6 ohm resistors in parallel, their total resistance is 6 ohms.

In electricity, the total resistance of a shunt resistor is equal to the sum of the resistance values of the individual resistors, therefore:

r total = r 1 + r 2 + r 3 = 6 + 6 + 6 = 18 ohms.

Note that if you connect multiple resistors in parallel, their currents will be the same, but the voltages of their resistors will be different.

If three 6 ohm resistors are connected in parallel, their total resistance will be 2 ohms.

The parallel formula is the reciprocal of the sum of the three resistors, and the answer should be two.

Correct, it's 180. y- Conversion method: rab=ra+rb+ra*rb rc,rac=ra+rc+ra*rc rb,rbc=rb+rc+rb*rc ra,rab,rac,rbc are the three resistors of the triangle, and ra,rb,rc are the three branch resistors of the y-shape.

y-transform calculation.

ra=rab*rac/（rab+rac+rbc）rb=rab*rbc/（rab+rac+rbc）

rc=rbc*rac/（rab+rac+rbc）

The mantra for converting a star to a triangle is: the denominator is in the diagonal, and the numerator is multiplied by two.

r12=(r1r2+r1r3+r2r3) r3,r13=(r1r2+r1r3+r2r3) r2,r23=(r1r2+r1r3+r2r3) r1, so r12=r13=r23=180 euros.

The mantra for converting a triangle to a star is: the sum of the three sides of the denominator, and the numerators multiplied by the edges.

r1=r12r13/(r12+r12+r23),r2=r12r23/(r12+r12+r23),r3=r13r23/(r12+r12+r23),

Their mutual relationship is 3 times, so it is 180 ohms.

Hope the answer works for you.

The three resistors connected to the Y-shape are all 30, so the resistance value of the three resistors of the equivalent shape is 30 3=90

3 All set one resistance to r, then no matter how the wiring is made, there are only two resistances: 23r, 4

3R (maximum resistance) Even the 12, 13, 23, 24, 34, 16, 15, 65, 64, and 45 post resistors are 2

2r+r=23

2r+r2r×r

2r+r=43

R So choose A