Question

как найти сопротивление катушки, не измеряя длину и площадь поперечного сечения намотанной части провода

Answer 1

по формуле R=U(напряжение) делённое на I (силу тока )        

Answer 2

Finding Resistance of a Coil Without Measuring Length and Cross-Sectional Area

To find the resistance of a coil without measuring the length and cross-sectional area of the wound part of the wire, you can use the formula for the resistance of a coil, which is given by:

R = ρ * (L / A)

Where: - R = resistance - ρ = resistivity of the material - L = length of the wire - A = cross-sectional area of the wire

Since we are not measuring the length and cross-sectional area, we can use an alternative method to find the resistance.

One way to do this is by using a known resistance and a multimeter. You can create a circuit with the known resistance and the coil in series, and then measure the total resistance using a multimeter. By subtracting the known resistance from the total resistance, you can find the resistance of the coil.

Another method is to use a Wheatstone bridge circuit. By balancing the bridge, you can find the unknown resistance (in this case, the resistance of the coil) without directly measuring its length and cross-sectional area.

These methods allow you to find the resistance of the coil without measuring its length and cross-sectional area directly.