Given below two statements:

Statement I:	Kirchhoff’s junction law follows the conservation of charge.
Statement II:	Kirchhoff’s loop law follows the conservation of energy.

1.	Both Statement I and Statement II are wrong.
2.	Statement I is correct but Statement II is wrong.
3.	Statement I is wrong and Statement II is correct.
4.	Both Statement I and Statement II are correct.

A battery consists of a variable number \(n\) of identical cells (having internal resistance \(r\) each) which are connected in series. The terminals of the battery are short-circuited and the current \(I\) is measured. Which of the graphs shows the correct relationship between \(I\) and \(n?\)

1.		2.
3.		4.

Three resistors are connected to a \(20\) V battery with a constant supply. One of the resistors is a variable resistor. The resistance of the variable resistor is gradually increased from zero to \(5\) \(\Omega.\)
   
Which graph shows how the current from the battery varies with the resistance \((R)\) of the variable resistor?

1.		2.
3.		4.

The dependence of resistivity \((\rho)\) on the temperature \((T)\) of a semiconductor is, roughly, represented by:

1.		2.
3.		4.

Which of the following graph represents the variation of resistivity ($\rho$) with temperature (\(T\)) for copper?

1.		2.
3.		4.

Kirchhoff's junction rule is a reflection of:

Which of the above statements are correct?
1. b and c
2. a and c
3. b and d
4. c and d

A cell having an emf \(\varepsilon\) and internal resistance \(r\) is connected across a variable external resistance \(R\). As the resistance \(R\) is increased, the plot of potential difference \(V\) across \(R\) is given by:

1.		2.
3.		4.

Which of the following \((\text{I-V})\) graphs represents ohmic conductors? 

1.		2.
3.		4.

Figure (i) and figure (ii) both are showing the variation of resistivity \((\rho)\) with temperature (T) for some materials. Identify the type of these materials.