एक मीटर ब्रिज में यदि शून्य सिरे से l cm पर संतुलन बिंदु प्राप्त होता है, तो अज्ञात प्रतिरोध (X) का सूत्र क्या होगा?

Why are alloys such as nichrome commonly used for heating elements in electric kettles instead of pure metals?

In a standard DC circuit, what is the conventional direction of electric current?

Which of the following expressions does NOT accurately represent the formula for electrical power P?