The presence of a magnetic field can be detected by _______?

مقناطیسی میدان کی موجودگی کا پتہ _______ سے لگایا جا سکتا ہے؟

Small mass

Stationary positive charge

Stationary negative charge

Magnetic compass

A magnetic compass is a device that responds to the presence of a magnetic field by aligning its needle with the direction of the field.

It is a common tool used to detect and measure magnetic fields.