12th Physics Current Electricity
Prepare for the Tamil Nadu 12th Physics Public Examination with carefully selected Chapter 2 ā Current Electricity Important 2 Mark Questions. These chapter-wise questions are compiled from the last six years of 1st Mid-Term, Quarterly, 2nd Mid-Term, Half-Yearly, Revision Exam 1, Revision Exam 2, and Tamil Nadu Public Examination question papers.
02
Chapter Number
Two Marks
50+ Question Papers
TN Board
Latest Syllabus
Most Repeated 2 Mark Questions
Curated from Previous Year Question Papers
State Kirchhoff’s voltage rule?
It states that in a closed circuit the algebraic sum of the products of the current and resistance of each part of the circuit is equal to the total emf included in the circuit.
This rule follows from the law of conservation of energy for an isolated system.
State Kirchhoff’s current rule?
Kirchhoff’s current rule states that the algebraic sum of the currents at any junction of a circuit is zero.
It is a statement of the law of conservation of electric charge.
What is Peltier effect?
When an electric current is passed through a circuit of a thermocouple, heat is evolved at one junction and absorbed at the other junction.
This is known as Peltier effect .
What is Seebeck effect?
Seebeck discovered that in a closed circuit consisting of two dissimilar metals, when the junctions are maintained at different temperatures, an emf (potential difference) is developed.
The current that flows due to the emf developed is called thermoelectric current .
Distinguish between drift velocity and mobility?
State Joule’s law of heating
It states that the heat developed in an electrical circuit due to the flow of current varies directly as:
Define Resistivity or electrical resistivity?
Electrical resistivity of a material is defined as the resistance offered to current flow by a conductor of unit length having unit area of cross section .
Its unit is ohm-metre (Ī©m) .
Define temperature coefficient of resistance?
It is defined as the ratio of increase in resistivity per degree rise in temperature to its resistivity at T.
Its unit is per Ā°C .
Appeared Once Questions
Curated from Previous Year Question Papers
Why current is a scalar?
Current has both magnitude and direction. But the direction of current does not obey vector laws of addition.
So, current is a scalar quantity .
State microscopic form of Ohm’s law?
What is Thomson effect?
If two points in a conductor are at different temperatures, the density of electrons at these points will differ and as a result a potential difference is created between these points.
Thomson effect is also reversible .
State macroscopic form of Ohm’s law?
Macroscopic form of Ohm’s law can be stated as “The potential difference across a given conductor is directly proportional to the current passing through it when the temperature remains constant.”
Continue Your Preparation
What’s Next?
Continue your journey through Lesson 2 ā Current Electricity. Master the important Three Mark and Five Mark questions, or explore the complete 12th Physics study guide covering every chapter.
ā Why Thousands of Students Choose Padidaa
ā Carefully Curated Previous Year Questions
ā Chapter-wise Important 2, 3 & 5 Mark Questions
ā Book Back Questions with Answers
ā Public Exam Focused Study Material
ā Free Online Notes & PDF Downloads
ā Updated for the Latest Tamil Nadu Board Syllabus
