20 Ω प्रतिरोध वाले एक तार को इस प्रकार खींचा जाता है कि उसका व्यास उसके मूल मान का एक-पांचवां हिस्सा हो जाता है। अब इसका नया प्रतिरोध 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?