The voltage current variation of two metallic wires X and Y at constant temperature are a shown in the figure HQ. 7. Assuming that the wires have the same length and the same diameter explain which of two wires will have larger resistivity.

The current I and voltage V curves for a given metallic wire at two different temperatures T_1 and T_2 are shown in the figure. Then ,

Two long straight, current-carrying condcutors , PQ and XY, are held a constant distance apart as shown in the figure. The conductors carry the magnitude of current in the same direction . A plan view form above the conductors is shown in the figure. The magnetic flux density B at a distance d from a long straight wire carrying a current I is given by B = 2.0 xx 10^-7 I/d Use this expression to explain why, under normal circumstances, wires carrying alternating current are not seen to vibrate.

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?

Two long straight, current-carrying conductors , PQ and XY, are held a constant distance apart as shown in the figure. The conductors carry the magnitude of current in the same direction . A plan view form above the conductors is shown in the figure. Use Newton's third law of motion to state the direction of the force on wire XY.

Two long straight, current-carrying conductors , PQ and XY, are held a constant distance apart as shown in the figure. The conductors carry the magnitude of current in the same direction . A plan view form above the conductors is shown in the figure. Draw arrows, one in each case, to show the direction of the magnetic field at Q due to the current in wire XY. the force at Q as a result of the magnetic field due to the current in wire XY.

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.

Two cells X and Y are connected to a resistance of 10Ω as shown in the figure.if the polarity of the cell Y is reversed, then the terminal voltage of the cell Y will be

Two cells X an Y are connected to a resistance of 10 Omega as shown in figure. The terminal voltage of cell Y is: