A voltmeter has a least count of $0.05$ volt. While doing Ohm's law experiment, a student observed that the pointer of the voltmeter coincides with $15$th divisions. What is the value of observed reading?

See carefully the circuit arrangement, shown below and answer the following questions.

(a) What is wrong with the given circuit?

(b) What you observe about the reading in the ammeter and the voltmeter?

In the experiment on finding the equivalent resistance of two resistors connected in series, three students connected the ammeter in their circuits in the three ways $X, Y$ and $Z$ as shown here:

$\left(\mathrm{X}\right)$     $\left(\mathrm{Y}\right)$    $\left(\mathrm{Z}\right)$

 Assuming their ammeters to be ideal, which of the students has not been correctly connected the ammeter?

In an experiment to determine the equivalent resistance of two resistors $R_1$ and $R_2$ in series. Which one of the following circuit diagrams show the correct way of connecting the voltmeter in the circuit?

$\left(\mathrm{I}\right)$           $\left(\mathrm{II}\right)$   

$\left(\mathrm{III}\right)$       $\left(\mathrm{IV}\right)$    

For the circuit shown below, what will be reading of the voltmeter?

A student sets up her circuit, for finding the equivalent resistance of two resistors ${\mathrm{R}}_1$ and ${\mathrm{R}}_2$ in series, in the manner as shown. She did not obtain the correct result in her experiment because of a mistake in her circuit. What mistake did she commit and what should do to correct this mistake? 

The given circuit diagram shows the experimental arrangement of different circuit components for determination of equivalent resistance of two resistors connected in series. Name the components $\mathrm{X}, \mathrm{Y}$ and $\mathrm{Z}$ shown in the circuit.

For carrying out the experiment, on finding the equivalent resistance of two resistors connected in series, a student sets up the circuit as shown. On further verification, he finds out that the circuit has one or more faults. Mention the fault.

(i) The resistors $R_1$ and $R_2$ have not been correctly connected in series.

(iI) The voltmeter has not been correctly connected in the circuit. 

(iii) The ammeter has not been correctly connected in the circuit.