Question

$\mathbb{ \underline{ \large{CURRENT \: \: ELECTRICITY }}}$


1) What is drift velocity ?

2) What are the limitations of ohm's law ?

3) Explain Kirchhoff's rules​

Answer 1

Answer:

1)Drift velocity :-

It is the average velocity of all electrons under the influence of external electric field.

2)Limitations of Ohm's law:-

Semiconductor diodes, vacuum tubes, liquid electrolytes,transistor etc does not obey ohm's law.

3)Kirchhoff's rules:-

Kirchhoff's first rule—the junction rule. The sum of all currents entering a junction must equal the sum of all currents leaving the junction. Kirchhoff's second rule—the loop rule. The algebraic sum of changes in potential around any closed circuit path (loop) must be zero.

Answer 2

$\huge \boxed{ \fcolorbox{cyan}{red}{Answer : }}$

$\star \rm{drift \: velocity}$

The average velocity attained by some particle such as an electron due to the influence of an electric field is termed as the drift velocity

$\star \rm{the \: limitations \: of ohm's \: law }$

※For non-linear electrical elements with parameters like capacitance, resistance etc the voltage and current won’t be constant with respect to time making it difficult to use Ohm’s law.

※As per ohm's law the current varies uniformly with potential difference.The curve drawn between potential and current must be a staright line.

$\star \rm{Kirchhoff's \: rules}$

The sum of all the currents entering any junction point is equal to the sum of all the currents leaving that junction point