उच्च प्रतिरोध सीमा (मेगाओम) वाले प्रतिरोधक मुख्य रूप से निम्नलिखित में से किस सामग्री से बने होते हैं?

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?