Column-I gives certain physical terms associated with flow of current through a metallic conductor.
Column-II gives some mathematical relations involving electrical quantities.
Match Column-I and Column-II with ap aropriate relations.

A metal wire is subjected to a constant potential difference. When the temperature of the metal wire increases, the drift velocity of the electron in It ______________.
Fill in the blank with the correct answer from the options given below.

For the given mixed combination of resistors calculate total resistance between points A and B.

Choose the correct answer from the options given below.

A cell of emf 1.1 and internal resistance 0.5 Ω is connected to a wire of resistance 0.5 Ω. Another cell of the same emf is now connected in series with the intention of increasing the current but the current in the wire remains the same. The internal resistance of the second cell is __________.
Fill in the blank with the correct answer from the given below.

P, Q, R and S are four wires of resistances 3, 3, 3 and 4 Ω respectively. They are connected to form the four arms of a wheat-stone bridge circuit. The resistance with which S must be shunted in order that the bridge may be balanced is __________.
Fill in the blank with the correct answer from the options given below.

Two resistances of 100 Ω and 200 Ω are connected in series -across a 20 V battery as shown in below. The reading in a 200 Ω voltmeter connected across the 200 Ω resistance is ____________.

Fill in the blank with the correct answer from the options given below.

The current through a 4/3 Ω external resistance connected to a parallel combination of two cells of 2 V and 1 V emf and internal resistances of 1 Ω and 2 Ω respectively is _____________.
Fill in the blank with the correct answer from the options given below.

A metallic wire of uniform area of cross section has a resistance R, resistivity ρ and power rating P at V volts. The wire is uniformly stretched to reduce the radius to half the original radius. The values of resistance, resistivity and power rating at V volts are now denoted by R', ρ' and P' respectively. The corresponding values are correctly related as ___________.
Fill in the blank with the correct answer from the options given below.

The neutral wire in a domestic electric circuit has the colour.