Physics Test - ...

A disc is given an initial angular velocity ω0ω0 and placed on rough horizontal surface as shown. The quantities which will not depend on the coefficient of friction is/are

A tube of length L is filled completely with an incompressible liquid of mass M and closed at both the ends. The tube is then rotated in a horizontal plane about one of its ends with a uniform angular velocity ω. The force exerted by the liquid at the other end is

A galvanometer has a 50 division scale. Battery has no internal resistance. It is found that there is deflection of 40 divisions when R.B.=2400 Ω. R.B.=2400 Ω. Deflection becomes 20 divisions when resistance taken from resistance box is 4900 Ω. Then we can conclude :

Note: This question is awarded as the bonus. Now the question is corrected.

A particle is released from rest from a tower of height 3h. The ratio of time taken to fall equal heights h i.e., t₁:t₂:t₃is

What is the spring constant for the combination of springs shown in figure?

A 100 W sodium lamp radiates energy uniformly in all directions. The lamp is located at the center of a large sphere that absorbs all the sodium light which is incident on it. The wavelength of the sodium light is 589 nm. What is the energy per photon in (eV) associated with the sodium light?

Two long parallel conductors are placed at right angles to a metre scale at the 2 cm and 6 cm marks as shown in the figure

They carry currents of 1 A and 3 A respectively. They will produce zero magnetic field at (ignore earth's magnetic field)

If the nucleus${}_{13}{}^{27}Al$ has a nuclear radius 3.6 fm, then${}_{32}{}^{125}Te$ would have its radius approximately as

A refrigerator is to maintain the eatables, kept inside it, at 9^oC. The coefficient of performance of the refrigerator, if the room temperature is 36^oC, is

A point mass mm is suspended at the end of a massless wire of length L and cross-section area A. If Y is Young's modulus for the wire, then the frequency of oscillations for the SHM along the vertical line is