Advantage of fixed pulley?
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Define Penumbra ?
What is different between secondary electron image and back scattered electron image?
which electronic devices used at low frequencies? and high frequencies?and microwave frequencies?
Explain the Amphoteric ?
What is the Electro magnet ?
how the tube light glows even if the starter is removed
You want to magnetize a metal. How would you do that?
Name the element which has the simplest absorption spectrum?
When an object moves with constant velocity does its average velocity during any time interval differ from its instantaneous velocity at any instant?
A coil consisting of 200 turns of wire has its ends connected to a circuit such that the total resistance of the coil and the circuit is 2.0 ohm. There is no source of e.m.f. in the circuit. Each turn of the coil is a square of side 18 cm, and a uniform magnetic field directed perpendicular to the plane of the coil is turned on. If the field changes linearly from 0 to 0.5 T in 0.8 s, what is the magnitude of the current in the coil while the field is changing?
Explain the Thermometers’ ?
heat cannot pass from a cooler substance to a warmer substance without some other process being involved. This is an example of which law of thermodynamics?