Why the maximum height of a mountain on Earth is 10km ?
Explanation The maximum height of mountain on earth depends upon shear modulus of rock. At the base of the mountain, the stress due to all the rock on the top…
Which is more elastic, rubber or steel ? Explain.
Explanation elasticity is the tendency of a body to oppose the change in its shape and size ( basically its configuration). Steel, because a body is said to be more…
What is gravitational potential energy without acceleration ?
EXPLANATION Firstly we need to understand what is gravitational potential energy . It is defined as the amount of work done in bringing a body from infinity to a point…
Write advantages of a reflecting telescope over a refracting telescope ?
Explanation Advantages of reflecting over refracting telescope are : Mirrors can be made bigger than lenses in size. No chromatic aberration. In case parabolic mirror is used, then no spherical…
How electromagnetic waves are produced ?
Explanation Electromagnetic waves are the combination of electric and magnetic field waves produced by moving charges. The creation of all electromagnetic waves begins with a charged particle. This charged particle…
Derive the Relation between Torque and Angular momentum ?
Explanation Angular momentum(L) : It is an measure of the rotation of body, taking into account its mass , shape and speed. L = r × p where r is…
Why moon doesn’t have atmosphere ?
Explanation The moon's escape velocity is much less than the root mean square (RMS) velocity of gas molecules on the moon. Therefore, the molecules of gas escape from the moon’s…
Why power is not consumed in case of purely inductive and capacitive circuit ?
Explanation INDUCTIVE CIRCUIT We know that in pure inductive circuit, current is lagging by 90 degree from voltage (in other words, Voltage is leading 90° from current) i.e the phase…
What is self inductance and mutual inductance ?
Explanation Self Inductance Self-induction means the coils induce the emf themselves. There is a change in the magnetic flux through that coil and because of this, the current will be…
What is torque ?
Explanation Torque is a measure of the force that can cause an object to rotate about an axis. Torque is a vector quantity. The direction of the torque vector depends…