Machines — Physics STD 10 — Question

Actually, mechanical advantage for all practical machines is always ___________ [greater than/less than/equal to] its velocity ratio.

A single fixed pulley is a modified form of _________ [Class I lever/ Class II lever/ Class III lever].

Complete the following sentence:
The current induced in a closed circuit only if there is ……………..

Fuse wire is made of an alloy of ___________  [copper and lead/tin and lead/ copper and iron]

Dynamo is an example of conversion of mechanical kinetic rotational energy to ___________  [sound energy/ heat energy/ electrical energy].

If half part of a convex lens is covered, the focal length ________change, but the intensity of image ________.

The ___________ [power/energy/force] of a body is its capacity to do work.

The product of mass and specific heat is known as ..........

Slimmer the glass slab, ___________ [greater/ less/ equal] is the lateral displacement.

The sound heard after reflection from a distant obstacle after the original sound has ceased, is called a/an ___________ [ultrasound / echo / reverberation].