Posts Tagged ‘capacitance’

CLASS XII PHYSICS SAMPLE PAPER FOR AISSCE 2012

CLASS XII – SAMPLE PAPER

PHYSICS

Time allowed : 3 hours

Max. Marks : 70

General Instructions:

1. All questions are compulsory
2. There are 30 questions in total. Questions 1 to 8 carry one mark each, 9 to 18 carry two marks each, 19 to 27 carry 3 marks each and 28 to 30 carry 5 marks each.
3. There is no overall choice, but internal choices are provided. You have to attempt only one choice in full.
4. Use of calculator is not permitted.
5. You may use the logarithm table, if required.

1. Express dielectric constant in terms of capacitance.

2. What is magnetic susceptibility?

3. Define electromagnetic induction. Read more…

EFFECT OF DIELECTRIC IN A CAPACITOR

The capacitance of a parallel plate capacitor without any medium between its plates is given by

When a dielectric completely fills the space between the plates of the capacitor, the capacitance increases K times, where K is the dielectric constant (relative permitivity) of the dielectric.

If a dielectric slab of thickness t (<d) is introduced between the plates, the capacitance becomes

OR

OR

In each case the capacitance increases with the introduction of a dielectric in between the plates

http://teacher.pas.rochester.edu/phy122/Lecture_Notes/Chapter27/chapter27.html

What is meant by charge on a capacitor?

Mohit asked this question:

“What is meant by charge on a capacitor?”

Answer: As we know, a simple capacitor (say a parallel plate capacitor) consists of two plates parallel to each other. When charged, charge on either plate of the capacitor is called charge on the capacitor.

The following links will help you explore further and understand more

• http://www.kpsec.freeuk.com/components/capac.htm
• http://hyperphysics.phy-astr.gsu.edu/hbase/electric/capac.html
• http://www.youtube.com/watch?v=zNpbdptwxlQ
• http://www.youtube.com/watch?v=qdXbnhb1bVo&feature=related

An Introduction to Capacitance

Capacitance is the property of an electric conductor that characterizes its ability to store an electric charge. An electronic device called a capacitor is designed to provide capacitance in an electric circuit by providing a means for storing energy in an electric field between two conducting bodies.

Read more and watch the interactive JAVA tutorial HERE

Capacitance Study Materials and numerical problems for practice

Important concepts and formulas from CAPACITANCE
Conceptual Problems (Solved) from CAPACITANCE
Unsolved Numerical Problems for Practice from CAPACITANCE
Solved Numerical Problems from CAPACITANCE

Revision and Practice Materials for Plus Two Physics – Capacitance

Important concepts and formulas from CAPACITANCE
capacitors conceptual questions and solutions
Unsolved Numerical Problems for Practice from CAPACITANCE
Solved Numerical Problems from CAPACITANCE