For which among the following house appliances, magnet is an essential part?

Where do you find the Isle of Youth?

Match List I with List II and select the correct answer using the code given below the lists

The Damuda series of Gondwana system has three stages, namely, Raniganj, Barren Rocks and Barakar. The middle stage is called Barren because

The resistance of a wire is 10 Ω. If it is stretched ten times, the resistance will be

Which one among the following is not produced by sound waves in air?