Physics Test 61

In a meter bridge experiment null point is obtained at 40 cm from one end of the wire when resistance X is balanced against another resistance Y. If X < Y, then the new position of the null point from the same end, if one decides to balance a resistance of 3X against Y, will be close to:

Two springs of force constants 300 N/m (Spring A) and 400 N/m (Spring B) are joined together in series. The combination is compressed by 8.75 cm. The ratio of energy stored in A and B is E_A/E_B. Then E_A/E_B is equal to:

A bullet of mass 10 g and speed 500 m/s is fired into a door and gets embedded exactly at the center of the door. The door is 1.0 m wide and weights 12 kg. It is hinged at one end and rotates about a vertical axis practically without friction. The angular speed of the door just after the bullet embeds into it will be:

On a linear temperature scale Y, water freeze at –160° Y and boils at –50° Y. On this Y scale, a temperature of 340 K would be read as: (water freezes at 273 K and boils at 373 K)

Photons of an electromagnetic radiation has an energy 11 keV each. To which region of electromagnetic spectrum does it belong?

This question has Statement–1 and Statement–2 Of the four choices given after the Statements, choose the one that best describes the two statements.

Statement 1: A capillary is dipped in a liquid and liquid rises to a height h in it. As the temperature of the liquid is raised, the height h increases (if the density of the liquid and the angle of contact remain the same)

Statement 2: Surface tension of a liquid decreases with the rise in its temperature.