Physics Test - ...

In Young's double slit experiment, if the separation between coherent sources is halved and the distance of the screen from the coherent sources is doubled, then the fringe width becomes

Given below are two statements:
Statement I: If a capillary tube is immersed first in cold water and then in hot water, the height of capillary rise will be smaller in hot water.
Statement II: If a capillary tube is immersed first in cold water and then in hot water, the height of capillary rise will be smaller in cold water.
In the light of the above statements, choose the most appropriate from the options given below

Light of wavelength 4000 Å is incident on a metal plate whose function is 2eV. The maximum kinetic energy of emitted photoelectron will be:

A pure capacitor of capacitance 100μF is connected to an AC voltage, V = 100.sin(10t). Find the maximum current in the circuit.

Given below are two statements:
Statement I: Acceleration due to earth's gravity decreases as you go 'up' or 'down' from earth's surface.
Statement II: Acceleration due to earth's gravity is same at a height ' \(h\) ' and depth ' \(d\) ' from earth's surface, if \(h=d\).
In the light of above statements, choose the most appropriate answer form the options given below

Dimensions of torque is:

The weight of a body at the surface of earth is \(18 \mathrm{~N}\). The weight of the body at an altitude of \(3200 \mathrm{~km}\) above the earth's surface is (given, radius of earth \(R_e=6400 \mathrm{~km}\) )