Class 12 Physics: Current Electricity Basics
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Q1 · MCQ · 1 mark
Which of the following is the SI unit of electric current?
Q2 · MCQ · 1 mark
Ohm's law states that at constant temperature, the current flowing through a conductor is directly proportional to the:
Q3 · MCQ · 1 mark
The reciprocal of resistance is known as:
Q4 · MCQ · 1 mark
Which material has a negative temperature coefficient of resistance?
Q5 · MCQ · 1 mark
Drift velocity of electrons is directly proportional to the:
Q6 · FILL · 1 mark
The total resistance of resistors connected in series is the ____ of their individual resistances.
Q7 · FILL · 1 mark
The SI unit of resistivity is ____.
Q8 · FILL · 1 mark
According to Kirchhoff's first rule, the algebraic sum of currents meeting at any junction in a circuit is ____.
Q9 · SHORT · 2 marks
Define electric current and state its formula.
Q10 · SHORT · 2 marks
What is the main difference between resistance and resistivity?