Ohm's Law

State ohms law with graphical representation.

In which direction the current flows inside a cell? ( Negative terminal to Positive terminal or Positive terminal to Negative terminal)

In which direction will the current flow inside the cell?

The current flows from positive terminal to negative terminal inside a cell.

A bulb is rated as $250 \mathrm{V} ; 0.4 \mathrm{A}$. Find its (i) resistance (ii) power.

Mathematical representation of Ohm's law is:

A potential difference of $24 \mathrm{V}$ is needed to make a current of $0.06 \mathrm{A}$ flow through a given wire. What potential difference (in volts) is needed to make a current of $150 \mathrm{mA}$ flow through the same wire.

An observer takes two observations as given below, while performing Ohm’s law experiment : 

Find the resistance of the conducting wire in ohms.

The resistivity of manganese wire of length $1 \mathrm{m}$ is $1.84\times {10}^{-6} \mathrm{\Omega } \mathrm{m}$ at $20 °\mathrm{C}$. If the diameter of the wire is $3\times {10}^{-4} \mathrm{m}$, what will be the resistance of the wire in at that temperature ? 
 

Which among the following graphs correctly represents ohms law?

An electric bulb is connected to a source of $220 \mathrm{V}$ and the current flowing through the circuit is $0.5 \mathrm{A}$. Calculate the resistance of the bulb in ohms?

On what factors does the resistance of a conductor depend?

_____is the metal which has the lowest resistivity.

Factors on which the resistance of a conductor depends ____________.

What would be the resistance of a conductor if the current flowing through it is $0.35 \mathrm{A}$ when the potential difference across it is $1.4 \mathrm{V}$?

If there is a wire of resistance R and we stretch it such that it becomes 2 times longer, then the new resistance of the wire will be______.

The resistivity of a metallic wire depends on the _____.(Nature of material/ size of the material )

A conductor having very high resistance is________.

The electrical resistivity of a given metallic wire depends upon _________.

The resistance of the conductor is R. If its length is doubled, then its new resistance will be __________.