Question

яка сила струму проходить через реостат , виготовлений з нікелинового дрота завдовгки 2 метра і площею поперечного перерізу 1мм^ якщо напруга на затискачах дорівнює 5B​

Answer 1

Ответ:

I=U/R

R=pL/S

I=US/pL=6,25 A

Объяснение:

Answer 2

Calculating the Current Passing Through the Nickel Wire Resistor

To calculate the current passing through the nickel wire resistor, we can use the formula for electrical resistance and Ohm's law.

The formula for electrical resistance is:

Resistance (R) = ρ * (L / A)

Where: - ρ (rho) is the resistivity of the material (in this case, nickel) - L is the length of the wire - A is the cross-sectional area of the wire

Given: - Length of the nickel wire (L) = 2 meters - Cross-sectional area of the wire (A) = 1mm^2 - Voltage across the resistor (V) = 5V

First, let's calculate the resistance of the nickel wire using the resistivity of nickel.

Calculating the Resistance of the Nickel Wire

The resistivity of nickel (ρ) is approximately 6.99 × 10^-8 ohm meters [[1]].

Using the formula for resistance, we can calculate the resistance (R) of the nickel wire:

R = ρ * (L / A)

Substituting the given values: R = (6.99 × 10^-8 ohm meters) * (2 meters / (1 × 10^-6 m^2))

Calculating the Current

Now that we have the resistance, we can use Ohm's law to calculate the current passing through the resistor.

Ohm's law states that: V = I * R

Where: - V is the voltage across the resistor - I is the current passing through the resistor - R is the resistance of the resistor

Solving for current (I): I = V / R

Substituting the given values: I = 5V / R

Now, let's calculate the current passing through the nickel wire resistor using the calculated resistance.

Result

The current passing through the nickel wire resistor, given a voltage of 5V, can be calculated using the above steps.