यदि बहुत कम तापमान पर किसी पदार्थ का विद्युत प्रतिरोध गिरकर पूर्णतः शून्य हो जाता है, तो उस पदार्थ को क्या कहा जाता है?

Which of the following organizations was instrumental in advocating for the abolition of Sati in India?

Who was the first President of independent India?

Who among the following was the founder of the 'Gadar Party'?