अस्थाई चुम्बक किस पदार्थ से बनाया जाता है?

Explanation: The steady-state theory was first proposed by Sir James Jeans in the 1920s, but it was reformulated by Fred Hoyle, Thomas Gold, and Hermann Bondi in 1948.

Explanation: Zero hour refers to the leftover time after question hour in Indian Parliament. During this time members are allowed to raise matters of importance without giving any prior notice. Zero hour is entirely at the discretion of the Speaker as there is no constitutional provision with regard to this.

Explanation: The Great Nicobar is the biggest island in the Nicobar group of Island.

Explanation: Ursa Minor, or the 'Little Bear', is a relatively conspicuous constellation, visible from the latitudes 90 degrees North to 10 degrees South. It is 'circum-polar', i.e. always visible in the sky, above 20 degrees North latitude.