The electric furnace wire is connected to the circuit through the wire. Is the current of the electric furnace wire and the wire equal? Why is the electric furnace wire very hot and the wire not hot

The electric furnace wire is connected to the circuit through the wire. Is the current of the electric furnace wire and the wire equal? Why is the electric furnace wire very hot and the wire not hot

The current is equal
According to Joule's law
The heat generated by the current passing through a conductor is proportional to the square of the current, to the resistance of the conductor, and to the time of power on
The current of the wire is equal to that of the wire, and the resistance of the wire is much greater than that of the wire
It's much bigger than the wire, so the wire is hot and the wire is not

There is a column of numbers: 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89 Its constitution rule is: the first two numbers are 1, the third number is equal to the sum of the first number and the second number: 1 + 1 = 2; the fourth number is equal to the sum of the second number and the third number: 1 + 2 = 3; the fifth number is equal to the sum of the third and the fourth number: 2 + 3 = 5; the sixth number is equal to the sum of the fourth and the fifth number: 3 + 5 = 8 And so on. Then the remainder of the number 2007 in this column divided by 7 is______ ．

According to the analysis, we can get the rule of remainder sequence: 1, 1, 2, 3, 5, 1, 6, 0, 6, 6, 5, 4, 2, 6, 1, 0 16 cycles, 2007 △ 16 = 125 The remainder of the number 2007 divided by 7 is the seventh in group 126, which is 6

Bulb P = 100W, u = 220V, l = 5m, s = 5mm2, what is the current temperature through the bulb, and what is the resistance of the bulb?

Current temperature? This can't be determined
The resistance, if it's normal, is 484

How to use three strands, four strings and five strings? The language is simple!

Hook three strands four strings five is a typical example of Pythagorean theorem, that is to say, a right triangle, when its two right angles are 3 and 4, then its hypotenuse is 5. This is the content of grade two, where do you know, you are only in grade five. And by the way, let me tell you about Pythagorean theorem. The formula of Pythagorean theorem is a * a + B

How to choose the range of ammeter and voltmeter when measuring resistance by voltammetry

R=U/I=4.8/0.5=9.6Ω
I=U/R=12/9.6＝1.25A
Because of 1.25a0.6a, it can't be replaced by an ammeter with a range greater than 1.25A

3.8x-x = 0.56

The voltage at both ends of the power supply does not change. Close the switch S. when the resistance in the sliding rheostat access circuit is RA, the voltage is 6 v

When the rheostat is connected to RA, R1, R2 and RA are connected in series, U1 = 6V, R1, R2 and Rb are connected in series, U2 = 9V, P1 = u1i1, P2 = u2i2., U1 = 6V,. U2 = 9V.. I1 / I2 = 3 / 2, U1 = I1 (R1 + RA), U2 = I2 (R1 + RB). The solution is: 5R1 + 9RA = 4RB

Let f (x) be differentiable on [0,1], and f (0) = 1, f (1) = 0. It is proved that there is at least one point η∈ (0,1) such that
Let f (x) be differentiable on [0,1], and f (0) = 1, f (1) = 0
It is proved that there is at least one point η∈ (0,1) such that η f '(η) + 3f (η) = 0

Consider g (x) = x ^ 3 F (x) because g (0) = g (1) = 0, so there exists η∈ (0,1), such that G '(η) = (g (1) - G (0)) / (1 - 0) = 0 and G' (η) = η ^ 3 F '(η) + 3 η ^ 2 F (η) = η ^ 2 (η f' (η) + 3 F (η)) because η ^ 2 ≠ 0, so η f '(η) +

Why is the voltage in the home circuit lower than 220 V at night

Shaan Fei is a fine cloth. It's a fine cloth
2 power supply from the substation to the user's circuit generally needs one end distance, this distance is different, long distance loss is large, in order to ensure reliable power supply, the general terminal voltage is higher than 220 V, so some users' voltage will be higher than 220 v

1/3-1/6-1/12-1/24…… -How to calculate 1 / 384?

1 / 24 is twice as much as 1 / 12, and 1 / 12 is twice as much as 1 / 6