Which of the following materials is used for the generation of ultrasonic waves by using magnetostriction effect?
What is the focal length of a double convex lens for which the radius of curvature of each surface is 30 cm and the refractive index of glass is 2.50 ?
In which type of motion does the velocity of a body vary with time?
The point where the total mass of a body is considered to be concentrated is known as what?
Which one of the following determines the sharpness of image in a camera?
What is the process of melting also called?
The sharpness of a television image is termed as its –
What is the value of acceleration due to gravity at the center of the earth?
A charged particle oscillates about its mean equilibrium position with a frequency of 105 Hz. What is the frequency of the electromagnetic wa...
As we go from Equator to North pole the value of ‘S; the acceleration due to gravity
