Question

Показания амперметров А и А1 соотвественно равны 2,4 и 0,4 А. Определите показания вольтметра,сопротивление R2 и общее сопротивление параллельно включенных проводников...R1=6Ом

Answer 1

Показания амперметров А и А1 соотвественно равны 2,4 и 0,4 А. Определите показания вольтметра,сопротивление R2 и общее сопротивление параллельно включенных проводников...R1=6Ом

Решение

Закон Ома: I=U/R

при параллельном соединении проводников:

Uобщ=U1=U2

Iобщ=I1+I2

Rобщ=(R1*R2)/(R1+R2)

тогда

I1=U/R1 ---> U=I1*R1=2,4*6=14,4 В - показание вольтметра

R2=U/I2=14,4/0,4=36 Ом

Rобщ=(6*36)/(6+36)=5,14 Ом

 

Answer 2

Given Information

- The readings of ammeters A and A1 are 2.4 A and 0.4 A, respectively. - The resistance R1 is 6 Ω.

Calculating Voltmeter Reading

To calculate the voltmeter reading, we need to determine the total current flowing through the circuit. Since the ammeters A and A1 are connected in parallel, the total current is the sum of their readings:

Total current (I) = A + A1 = 2.4 A + 0.4 A = 2.8 A

Next, we can use Ohm's law to calculate the voltage across the resistance R1:

Voltage across R1 (U1) = I * R1 = 2.8 A * 6 Ω = 16.8 V

Since the voltmeter is connected in parallel to R1, it will measure the same voltage. Therefore, the voltmeter reading is 16.8 V.

Calculating Resistance R2

To calculate the resistance R2, we can use the formula for the total resistance of parallel resistors:

Total resistance (R) = R1 + R2

Since we know the value of R1 (6 Ω), we can rearrange the formula to solve for R2:

R2 = R - R1

Substituting the known values:

R2 = R - 6 Ω

Unfortunately, the value of R is not provided in the given information. Without the value of R, we cannot calculate the exact resistance R2.

Calculating Total Resistance of Parallel Conductors

The total resistance of parallel conductors can be calculated using the formula:

Total resistance (R) = 1 / (1/R1 + 1/R2)

Since we know the value of R1 (6 Ω), we can substitute it into the formula:

Total resistance (R) = 1 / (1/6 Ω + 1/R2)

Again, without the value of R2, we cannot calculate the exact total resistance of the parallel conductors.

In summary: - The voltmeter reading is 16.8 V. - The resistance R2 cannot be determined without the value of R. - The total resistance of the parallel conductors cannot be determined without the value of R2.