Question

Задача по физике.обмотка реостата сопротивления 84 Ом выполнена из никеливой проволоки длиной 200 м.Какова площадь поперечного сечения проволоки.?

Answer 1

R=(q*L):s

S=(q*L):R

qникелиновой проволки =0,4ом*мм(в квадрате):м

s=0,4ом*мм(в квадрате):м*200м:84ом=примерно 1 мм(в квадрате)

Answer 2

Calculation of the Cross-Sectional Area of the Wire

To calculate the cross-sectional area of the wire, we can use the formula:

Resistance (R) = Resistivity (ρ) x Length (L) / Cross-Sectional Area (A)

Given that the resistance of the wire is 84 Ω and the length of the wire is 200 m, we can rearrange the formula to solve for the cross-sectional area:

A = ρ x L / R

However, we need the resistivity (ρ) of the wire to proceed with the calculation. Unfortunately, the provided search results do not contain the necessary information to determine the resistivity of nickel wire. Therefore, without the resistivity value, we cannot accurately calculate the cross-sectional area of the wire.

If you have any additional information or if there is anything else I can assist you with, please let me know!