A constant current is tent through a helical coil. The coil ______?

ایک مستقل کرنٹ ایک ہیلیکل کنڈلی کے ذریعے خیمہ ہے۔ کنڈلی ______؟

Produces zero magnetic field at its center

Tends to get shorter

Tends to get longer

None of these

When a constant current passes through a helical coil, it generates a magnetic field along its axis, similar to a solenoid.

The electromagnetic forces between the coil’s turns act inward, causing the coil to contract and shorten rather than expand.