Physics Test - ...

A ball falls on surface from \(10 \mathrm{~m}\) height and rebounds to \(2.5 \mathrm{~m}\). If duration of contact with floor is \(0.01\) sec then average acceleration during contact is ___ \(\mathrm{ms}^{-2}\).

For the given uniform square lamina ABCD whose centre is O,

Three particles, each of mass 'm' g, are situated at the vertices of an equilateral triangle ABC of side l cm (as shown in the figure). The moment of inertia of the system about a line AX perpendicular to AB in the plane of ABC in gram-cm² unit will be

Three weights w, 2w and 3w are connected to an identical spring suspended from a rigid horizontal rod. The assembly of the rod and the weights fall freely. The position of the weight from the rod are such that

A horizontal platform is rotating with uniform angular velocity around the vertical axis passing through its centre. At some instant of time, a viscous fluid of mass 'm' is dropped at the centre and is allowed to spread out and finally fall. The angular velocity during this period

What is the dimension of L/RCV, where L, R, C and V have their usual meanings?

In the following figure, the height of the object is H₁ = + 2.5 cm. What is the height of the image of H₁?

A convex lens made up of a material of refractive index μ₁ is immersed in a medium of refractive index μ₂ as shown in the figure. The relation between μ₁ and μ₂ is 

A Carnot engine works as a refrigerator between 250 K and 300 K. If it receives 750 calories of heat from the reservoir at the lower temperature, then the amount of heat rejected at the higher temperature is

F₁ and F₂ are focal lengths of the objective and the eyepiece of a telescope, respectively. The angular magnification for this telescope is equal to