1. The dimension of \(\dfrac{B^2}{2\mu_0}\), where \(B\) is the magnetic field and \(\mu_0\) is the magnetic permeability of vacuum, is: 1. \([ML^{-1}T^{-2}]\) 2. \([ML^2T^{-1}]\) 3. \([MLT^{-2}]\) 4. \([ML^2T^{-2}]\) Solution: The quantity \(\dfrac{B^2}{2\mu_0}\) represents magnetic energy stored per unit volume (Energy …
Read More

1. Young’s modulus of elasticity \( Y \) is expressed in terms of three derived quantities, namely, the gravitational constant \( G \), Planck’s constant \( h \) and the speed of light \( c \), as \( Y = …
Read More

QUESTIONS FOR SHORT ANSWER 1. When you lift a box from the floor and put it on an almirah the potential energy of the box increases, but there is no change in its kinetic energy. Is it a violation of …
Read More

1. You are driving a motorcycle on a horizontal road. It is moving with a uniform velocity. Is it possible to accelerate the motorcycle without putting higher petrol input rate into the engine? Solution: Yes, it is possible to accelerate …
Read More

QUESTIONS FOR SHORT ANSWER 1 A For most of the surfaces used in daily life, the friction coefficient is less than 1. Is it always necessary that the friction coefficient is less than 1? Answer: No Explanation: It is not …
Read More

…
Read More