Experimental Physics

A potentiometer wire $\mathrm{AB}$ having length $L$ and resistance $12r$ is joined to a cell $D$ of emf $\epsilon\,$ and internal resistance $r$. Acell $C$ having EMF$\epsilon\,/2$ and internal resistance $3r$ is…

In a meter bridge experiment, the circuit diagram and the corresponding observation table are shown in figure. S. No. $R\left(\Omega\,\right)$ $l\left(cm\right)$ 1. 2. 3. 4. $1000$ $100$ $10$ $1$ $60$ $13$ $1.5$ $1.0$…

Diameter of a steel ball is measured using a Vernier calipers which has divisions of 0.1 cm on its main scale (MS) and 10 divisions of its Vernier scale (VS) match 9 divisions on the main scale. Three such measurements…

When two resistance $R_{1}$ and $R_{2}$ connected in series and introduced into the left gap of a meter bridge and a resistance of $10\Omega\,$ is introduced into the right gap, a null point is found at $60\mathrm{cm}$…

The resistance of the meter bridge AB in given figure is $4 \Omega$. With a cell of emf $\varepsilon=0.5 \mathrm{~V}$ and rheostat resistance $\mathrm{R}_{\mathrm{h}}=2 \Omega$ the null point is obtained at some point…

In a meter bridge experiment, the circuit diagram and the corresponding observation table are shown in figure. S. No. $R(\Omega)$ $l(cm)$ 1. 2. 3. 4. $1000$ $100$ $10$ $1$ $60$ $13$ $1.5$ $1.0$ Which of the reading is…

In a screw gauge the zero of main scale reference line coincides with the fifth division of the circular scale when two studs are in contact. There are $100$ divisions in circular scale and pitch of screw gauge is $0.1$…

When both jaws of vernier callipers touch each other, zero mark of the vernier scale is right to zero mark of main scale, $4^{\text {th }}$ mark on vernier scale coincides with certain mark on the main scale. While…

The measured value of the length of a simple pendulum is$20cm$with$2mm$accuracy. The time for$50$oscillations was measured to be$40$seconds with$1$second resolution. From these measurements, the accuracy in the…

Given below are two statements: one is labelled as Assertion(A) and the other is labelled as Reason (R). Assertion (A): In Vernier calliper if positive zero error exists, then while taking measurements, the reading…

A load of mass$Mkg$is suspended from a steel wire of length$2m$and radius$1.0mm$in Searle's apparatus experiment. The increase in length produced in the wire is$4.0mm.$Now the load is fully immersed in a liquid of…

Figure 1 shows the configuration of main scale and Vernier scale before measurement. Fig. 2 shows the configuration corresponding to the measurement of diameter $D$ of a tube. The measured value of $D$ is: