How many copper wires are each core of YJV cable from 10 to 185? What is the diameter of copper wire? Is there any rule?

How many copper wires are each core of YJV cable from 10 to 185? What is the diameter of copper wire? Is there any rule?

YJV generally uses type 2 and type 4 compact conductors
The number of copper wires is designed by the manufacturer itself as long as the final conductor resistance meets the requirements
In the process of processing, the copper wire will be deformed and stretched to a certain extent
The diameter and resistance of copper wire enameled wire
The larger their diameter is, the better their resistance is, and the smaller their diameter is, the better their resistance is?
The diameter is inversely proportional to the resistance, just like the running water in a water pipe. The thinner the pipe, the greater the water pressure
Under the same length, the larger the diameter is, the smaller the resistance is, and the smaller the diameter is, the larger the resistance is
It's a formula. I = nqvs, For the same material, n (the number of charges per unit volume) and Q (the amount of charge of the basic charge) are all equal to their own material. But under the same voltage, V is equal (not listed here according to the kinetic energy theorem), the diameter increases by two times, and the current increases by four times. That is to say, R is proportional to the square of the diameter (which can be inferred from the change of s) Unfold
It's a formula. I = nqvs, For the same material, n (number of charges per unit volume) and Q (amount of charge of basic charge) are all equal to their own material. However, under the same voltage, V is equal (not listed here according to the kinetic energy theorem), the diameter increases by two times and the current increases by four times. That is to say, R is proportional to the square of the diameter (which can be inferred from the change of s) Put it away
How to detect leakage power supply for household appliances and leakage protector
It is to detect the current. Normally, the current flowing out from the power supply is equal to the current returning. When the electrical equipment has leakage, the two are not equal. Some current flows away from the leakage and returns to the power supply through another route
It is known that {an} is an equal ratio sequence with a positive number Q as the common ratio, A1 = 8, and BN = lg2an. In the first n terms of {BN} and Sn, only S7 is the largest. The value range of Q is obtained
Because {an} is an equal ratio sequence with positive number Q as the common ratio, A1 = 8
So an = 8 * q ^ (n-1)
Because in the first n terms of sequence {BN} and Sn, only S7 is the largest
So B7 is greater than 0 and B8 is less than 0
Then A7 = 8 * q ^ 6 is greater than 1, a8 = 8 * q ^ 7 is less than 1
It is concluded that Q is greater than (1 / 8) for 6 times and less than (1 / 8) for 7 times
Given sin ^ 2B = 2Sin ^ 2a-1, proving Tan ^ 2A = 2tan ^ B + 1
Prove: sin ^ 2B = 2Sin ^ 2a-1, cos ^ 2B = 1-sin ^ 2B = 1 - (2Sin ^ 2a-1) = 2 (1-sin ^ 2a) = 2cos ^ 2a, then Tan ^ 2a-2tan ^ B = sin ^ 2A / cos ^ 2a-2sin ^ 2B / cos ^ 2B = sin ^ 2A / cos ^ 2a-2sin ^ 2B / (2cos ^ 2a) = sin ^ 2A / cos ^ 2a-sin ^ 2B / cos ^ 2A = (sin ^ 2a-sin ^ 2b) / cos ^
Sin ^ 2B = 2Sin ^ 2a-1 prove Tan ^ 2A = 2tan ^ B + 1sin ^ 2B = 2Sin ^ 2a-1 prove Tan ^ 2A = 2tan ^ B + 1
Given the set a = (x / X is less than or equal to 1), B = (x / X is greater than or equal to a), and a and B = R, then the value range of real number a is
A set represents the left part of 1 on the number axis, so that a ∪ B = R
That is, a ∪ B represents the whole number axis, then B must include the right part of 1 on the number axis, so a ≤ 1
If the function f (x) = e ^ x-ax ^ 2 (E is the base of natural logarithm) has two extreme points, then the value range of real number a is
If the function f (x) = e ^ x-ax ^ 2 (E is the base of natural logarithm) has two extreme points, then the value range of real number a is,
A、(e,+∞)
B、（1，+∞）
C、（0，e）
D、（1/e，e）
 
 
It is known that the common ratio of {an} is Q, the first n terms and Sn ＞ 0 (n = 1, 2, 3,...) Then the value range of Q is______ .
When n = 1, A1 = S1 > 0, the first term must be positive. (1) when q = 1, Sn = Na1 > 0, (2) when Q ≠ 1, Sn = A1 · 1 − QN1 − Q
If Tan ^ 2A = 2tan ^ 2B + 1, what is cos2a + sin ^ 2B
It's a process
The answer is 0, (Tana) ^ 2 = 2 (tanb) ^ 2 + 1; (Sina / COSA) ^ 2 = 2 (SINB / CoSb) ^ 2 + 1; [(Sina) ^ 2] * [(CoSb) ^ 2] = 2 [(SINB) ^ 2] * [(COSA) ^ 2] + [(COSA) ^ 2] [(CoSb) ^ 2]; [1 - (COSA) ^ 2] [1 - (SINB) ^ 2] = 2 [(SINB) ^ 2] * [(COSA) ^ 2] + [(COSA) ^ 2] * [1 - (SINB) ^ 2]; and
The solutions of quadratic inequality MX & # 178; + (m-1) x + 1 > 0 are all real numbers, and the value range of M is obtained
m>0 （1）
(m-1)²-4m