Experimental Physics

The circular divisions of shown screw gauge are 50 . It moves 0.5 mm on main scale in one rotation. The diameter of the ball is

The length of the second's pendulum is decreased by 0.3 cm when it is shifted to Chennai from London. If the acceleration due to gravity at London is $981 \mathrm{~cm} / \mathrm{s}^2$, the acceleration due to gravity at…

The figure shows two diagrams of the same screw gauge. In the first case, nothing is kept in its jaw and in the second case a small ball is kept between the jaws for which the diameter is required to be measured. The…

As shown in the figure initially switch $k_{1}$ is open and $k_{2}$ is closed and deflection of galvanometer is $\theta\,_{0}$ . Now both switch are closed then the deflection in galvanometer is (given $R_{H}=5…

With a resistance of 'X' in the left gap and a resistance of 9 $\Omega\,$ in the right gap of meter bridge, the balance point is obtained at 40 cm from the left end. In what way and to which resistance $3\Omega\,$…

Two resistance $\mathrm{X}$ and $\mathrm{Y}$ are connected in the two gaps of a meterbridge and the null points is obtained at $20 \mathrm{~cm}$ from zero end. When the resistance of $20 \Omega$ is connected in series…

In meter bridge experiment, null point was obtained at a distance ' $l$ ' from left end. The values of resistances in the left and right gap are doubled and then interchanged. The new position of the null point is

In a resonance tube experiment, a tuning fork resonates with air column of length $12 \mathrm{~cm}$ and again resonates when air column is $38 \mathrm{~cm}$ long. The end correction will (b)

A simple pendulum has a periodic time ' $\mathrm{T}_1$ ' when it is on the surface of earth of radius ' $R$ '. Its periodic time is ' $T_2$ ' when it is taken to a height ' $R$ ' above the earth's surface. The value of…

In a meter bridge experiment null point is obtained at $l \mathrm{~cm}$ from the left end. If the meter bridge wire is replaced by a wire of same material but twice the area of across-section, then the null point is…

A meter scale is supported on a wedge at its centre of gravity. A body of weight ' $w$ ' is suspended from the 20 cm mark and another weight of 25 gram is suspended from 74 cm mark balances it and the meter scale…

A glass convex lens is of refractive index $1 \cdot 55$ with both faces of same radius of curvature. What will be the radius of curvature if focal length is to be $20 \mathrm{~cm}$ ?