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Using the shunt resistance formula, the reciprocal of the total resistance is equal to the sum of the reciprocals of the individual resistors.
Concatenation. 1. Definition: A circuit composed of connecting components one by one is called a series circuit; 2. Characteristics of series circuit:
The current is the same everywhere, i.e. i1 = i2 = i3 = i total; The power supply voltage is equal to the sum of the voltages of each electrical appliance, i.e., u=u1+u2+u3. [Detailed].
Parallel connection. 1. Definition: A circuit that connects components in parallel is called a parallel circuit; 2. Characteristics of parallel circuit:
The trunk current is equal to the sum of the currents of each branch, i.e. i=i1+i2+i3; The power supply voltage is equal to the voltage of each branch, i.e., u=u1=u2=u3. [Detailed].
Resistance. 1. Definition: The obstruction effect of a conductor on the current is called resistance; 2. Characteristics of resistance:
Resistance is a property of the conductor itself, its size determines the material, length, cross-sectional area and temperature of the conductor, the symbol of the resistance is "r", the unit is "ohm", and the unit symbol is " "1 trillion ohm (m) = 1000 kiloohm (k), 1 kiloohm (k) = 1000 ohm ( ) 3, the total resistance in the series circuit: r total = r1 + r2 [detail].
Ohm's Law. 1. In the same circuit, the current in the conductor is directly proportional to the voltage at both ends of the conductor and inversely proportional to the resistance of the conductor, which is called Ohm's law; The basic formula is i=u r; 2. The derivation of Ohm's law i=u r r=u i or u=ir cannot say that the resistance of a conductor is proportional to the voltage at both ends and inversely proportional to the current passing through it, because the resistance of a conductor is a property of itself, depending on the length, cross-sectional area, material and temperature of the conductor, even if there is no voltage at both ends and no current passes through, its resistance value is also a fixed value.
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4 ohms! Add five 20ths and divide by 1! Five 20ths add up to 5/20, then find its reciprocal, the reciprocal is 20/5, which is 4 ohms!
For example, a 10 ohm resistor, a 20 ohm resistor, a 30 ohm resistor in parallel.
Then use 1 ( 1 10+1 20+1 30) to get the equivalent resistance value after parallel connection!
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Because they are connected in parallel, the voltage at both ends of all the resistors is the same, and we assume that the early voltage of the two ends of all resistors is V. The current through any one of the resistors is i=u r=v 10, and the two resistors are two i....The current of n resistors (the beam is set to i1) i1 = n * i = n * v 10, so its resistance is v i1 = 10 n
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Summary. 30 resistors are connected in parallel, the total resistance is ohms, how many ohms is the resistance of the resistors.
Hello dear, 10=r1+r2---1 formula 1 formula by 2 formula have: 1 formula substitute 1 formula into 3 formula have: 1 I hope mine is helpful to you, thank you, I wish you a happy life!
30 resistors are connected in parallel, the total resistance is ohms, how many ohms is the resistance of the resistors.
30 resistors in parallel, the total resistance is ohms, how much is the resistance of the resistor, hello dear, 10=r1+r2---1 formula 1 formula by 2 formula has: 1 formula substitute 1 formula into 3 formula have: 1 I hope mine is helpful to you, thank you, I wish you a happy life!
Please tell me directly how many ohms it is, because I don't know how much it is.
10=r1+r2---1 formula 1 is composed of 2 formulas: 1 formulas substitute 1 formulas into 3 formulas have: 1
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The total impedance of resistance, capacitance, and inductance in series:
Z root number [r squared (xl xc) squared].
Total impedance when resistors, capacitors, and inductors are connected in parallel:
z 1 root number [(1 r) squared (1 xl 1 xc) squared] formula: z=r+i( l 1 ( c)).
Note: The load is a resistor, inductance of inductance, capacitive reactance of three types of compounds, after the composite is collectively referred to as "impedance", written as a mathematical formula is: impedance Z = R + I ( l 1 ( C)).
where r is the resistance, l is the inductive reactance, and 1 (c) is the capacitive reactance.
1) If (l 1 c) > 0, it is called "inductive delayed load";
2) Conversely, if (l 1 c) <0 is called "capacitive load".
The ohmmeter is an instrument for measuring resistance, Figure 1 is the measurement principle of the ohmmeter, G is an ammeter with internal resistance for RG and full-scale current for IG, and R is a variable resistance, also called zeroing resistance; The battery is a dry battery, the electromotive force is E, the internal resistance is R, and the red pen (inserted into the "+" jack) is connected to the negative pole of the battery; The black watch pen (inserted into the "-" jack) is connected to the positive pole of the battery when the resistance rx is measured >>>More
10kV with a length of 500m and below
Power cables. with 2500v >>>More