Answer available
Class 12 · Physics · Current Electricity
How does the resistivity of a metal and of a semiconductor change with temperature, and why?
3 marksMediumShort answer
Class 12 · ICSE · Physics
Current Electricity
Ohm's law, resistivity, drift velocity, Kirchhoff's laws, the Wheatstone bridge, the potentiometer and internal resistance.
- Questions
- 7
- PYQs
- 0
- Topics
- 0
Syllabus mapping: ISC syllabus (CISCE)
Questions
7 questions in this chapter.
- Answer available
Class 12 · Physics · Current Electricity
A cell of emf 2 V and internal resistance 0.5 Ω is connected to a 3.5 Ω resistor. Find the current and the terminal potential difference.
3 marksMediumNumerical
- Answer available
Class 12 · Physics · Current Electricity
What is drift velocity, and how is it related to the current in a conductor?
3 marksMediumShort answer
- Answer available
Class 12 · Physics · Current Electricity
State Kirchhoff's two laws and say what conservation principle each expresses.
3 marksMediumShort answer
- Answer available
Class 12 · Physics · Current Electricity
Three resistors of 6 Ω each are joined in parallel and the combination is connected across a 12 V battery of negligible internal resistance. Find the current drawn.
3 marksMediumNumerical
- Answer available
Class 12 · Physics · Current Electricity
State the principle of a potentiometer and one advantage it has over a voltmeter.
3 marksMediumShort answer
- Answer available
Class 12 · Physics · Current Electricity
State the principle of a Wheatstone bridge and the condition for balance.
3 marksMediumShort answer