NCERT Solutions Class 12 Physics Chapter 3 Current Electricity Free PDF Download

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How would the following i energy ii charge, iii potential be affected if dielectric slab is introduced with battery disconnected, b dielectric slab is introduced after the battery is connected. Q8 :For the matrix , verify that i is a symmetric matrix ii is a skew symmetric matrix Answer : i Hence, is a symmetric matrix. Hence, manganin is an ohmic conductor i. Determine the temperature coefficient of resistivity of silver.

Interference, Young's double slit experiment and expression for fringe width, coherent sources and sustained interference of light, diffraction due to a single slit, width of central maximum, resolving power of microscope and astronomical telescope, polarisation, plane polarised light, Brewster's law, uses of plane polarised light and Polaroids. B Calculate the new balance point of the bridge above if M and N are interchanged.

NCERT Solutions for Class 12 Physics Chapter 3 Current Electricity

All the questions are given topic wise. Magnetic Flux The magnetic flux linked through any surface placed in a magnetic field is the number of magnetic field lines crossing this surface normally. Dimensional formula and its the unit of magnetic flux. An electric field is set up within the rod which is oppose motion of electron. Self and Mutual Inductance Inductance is that property of electrical circuits which oppose any change in the current in the circuit. Inductance is the electro-magnetic analogue of mass m in mechanics. Self induced current opposes any change in the current in a circuit. If two conducting coils are kept close to each other and a steady current I passed through one coil, magnetic flux links with the other coil. Eddy Current Advantage and disadvantage of Eddy current. Whenever a solid conductor is kept in a region of varying magnetic field the magnetic flux linked with the conductor changes and induced emf is produced by induction. As a result circulatory currents are induced in the plane normal to the direction of flux. These currents are distributed through out the conductor. These are known as Eddy currents.

Write any two important precautions you would observe while performing the experiment. What is the temperature of the element if the resistance is found to be 117 Ω, given that the temperature coefficient of the material of the resistor is 1. Therefore, they are not constant. Q3 : a Three resistors 1 Ω, 2 Ω, and 3 Ω are combined in series. Conductors and insulators, free charges and bound charges inside a conductor. Thus by the principle of mathematical induction, we have: Q3 :If , then prove where n is any positive integer Answer : It is given that We shall prove the result by using the principle of mathematical induction. What might you do if you failed to find a balance point with the given cell of emf ε? The conversion of complex circuits into simple series and parallel circuits must be well versed. The connection between resistors in a Wheatstone or metre bridge is made of thick copper strips to minimize the resistance, which is not taken into consideration in the bridge formula. Self and Mutual Inductance Inductance is that property of electrical circuits which oppose any change in the current in the circuit. Therefore, they are not constant. What is the purpose of having a series resistor in the charging circuit?