Table of Contents
Charging of Insulators
Since charge cannot flow through insulators, neither conduction nor induction can be used to charge, insulators, so in order to charge an insulator friction is used. Whenever an insulator is rubbed against a body exchange of electrons takes place between the two. This results in appearance of equal and opposite charges on the insulator and the other body. Thus the insulator is charged.
For example rubbing of plastic with fur, silk with glass causes charging of these things.
-
Reynolds Number
Last modified on:3 years agoReading Time:10MinutesWhat is Reynolds Number? The Reynolds number (Re) is a dimensionless parameter used in fluid mechanics to characterize the flow of a fluid (liquid or gas) around an object or through a conduit. It relates the inertial forces to the viscous forces in the fluid and helps determine the type of…
-
Conceptual Questions Based on Moving Charges and Magnetism
Last modified on:3 years agoReading Time:16MinutesConceptual Questions Based on Moving Charges and Magnetism Here we are providing conceptual questions for Class 12 Physics Chapter 4 Moving Charges and Magnetism. Q.1. How is a magnetic field produced ?Sol. A magnetic field can be produced by the following ways: (i) by a magnet (ii) by a current carrying…
-
Numerical Problems Based on Class 12 Chemistry Chapter 3 Electrochemistry
Last modified on:4 years agoReading Time:9MinutesNumerical Problems Based on Class 12 Chemistry Chapter 3 Electrochemistry Q.1. Calculate the resistance of 0.01 N solution of an electrolyte whose equivalent conductivity is 420 ohm-1 cm2 equiv-1 (The cell constant of the cell is 0.88 cm-1). Show Answer Answer: 209.5 ohm Q.2. A conductivity cell when filled with 0.02…
-
Topicwise Important Questions and Answers for Class 12 Physics Chapter 2 Electrostatic Potential and Capacitance
Last modified on:4 years agoReading Time:2MinutesHere we are providing topicwise important questions with answers for Class 12 Physics Chapter 2 Electrostatic Potential and Capacitance. Study notes of topics covered are also provided so that you can revise at the same time before doing the question answer. Topicwise Important Questions and Answers for Class 12 Physics Chapter…
