Two students perform the experiments on series and parallel combinatins of two given resistors `R_1` and `R_2` and plotted the following V-I graphs:

Which of the graph is correctly labelled in term sof the words "series" and "paralle"? justify your answer.

In an experiment to determine equivalent resistance of two resistors R_1 and R_2 in series, which one of the following circuit diagrams shows the correct way of connecting the voltmetr in the circuit?

A student carries out an experiment and plots of V-I graph of three samples of nichrome wire was resistance R_1, R_2 and R_3 respectively. Which of the following is true?

A cell, with finite internal resistance r, is connected across two external resistances R_1 and R_2(R_1> R_2) , one by one. In which case would the terminal potential difference of the cell more ? Justify your anwer.

V-I graph for a metallic wire at two different temperatuare T_1 and T_2 is as shown in the following figure. Which of the two temperature T_1 and T_2 is higher and why?

Three students X,Y and Z performed an experiment for studying the variation of alternating currents with angular frequency in a series LCR-circuit and obtained the graphs shown in the figure They all used a.c sources of the same r.m.s. value and inductances of the same value. What can we conclude about the resistance values used by them

Three students X,Y and Z performed an experiment for studying the variation of alternating currents with angular frequency in a series LCR-circuit and obtained the graphs shown in the figure They all used a.c sources of the same r.m.s. value and inductances of the same value. What can we conclude about the capacitance value. What can we conclude about nature of the impedance of the set up at frequency omega_0 ?

Consider the following circuit: R_1=R_2=R_3=R_4=R_5=2ohm Which two resistors are connected in series?

When two resistors of resistance R_1 and R_2 are connected in parallel, the net resistance is 3 ohm. When connected in series. Its values of 16 ohm. Calculate the value of R_1 and R_2 .

V-I graph for a mettalic wire at two different temperatures T_1 and T_2 is as shown in figure. WHich of the temperatures T_1 and T_2 is higher and why.