शिक्षको ने कविता की

Which physical quantity has unit “Joule/second”?  

In a closed organ pipe, the frequencies of vibration are in the ratio:

A coil takes 4 A from a 12 V DC source. When connected to a 12 V, 50 rad/s AC source, the current is 2.4 A. The inductance of the coil is:

What is the weight of a 10 kg object on Earth? (Take g = 9.8 m/s²)  

Which property of a wave is related to its frequency?  

In a convex lens, when the object is at infinity, then the position of image is ______.

Clear nights are colder than cloudy nights because of –

In which type of wave do the particles of the medium vibrate perpendicular to the direction of wave propagation?  

A current of 5 A flows through a 10 Ω resistor. Find the voltage.  

Sounds of frequencies less than about ______ vibrations per second cannot be detected by the human ear.