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UP Board Solutions Class 10 Science ??????? � UP Board Guide

A few questions related to these books are given. 10hh 1: Electric Charges and Fields 1. Does the charge given to a metallic 110th depend on whether it is hollow or solid? Give reason for your answer. A 12 pF capacitor is connected to a 50 v battery.

How much electrostatic energy is stored in the capacitor? If another capacitor of 6 pf is connected in series with it with the same battery connected across the combination, find the charge stored and potential difference across each capacitor. Derive the expression for the pjysics potential due to an electric dipole at a point on its axial line. Depict the equipotential surfaces due to an electric dipole.

Derive an expression for drift velocity of electrons in a conductor. A 10th physics ncert pdf up whose cross sectional area 10th Class Physics Notes Pdf Ncert Utility ncett increasing linearly from its one end to the other, nncert connected across a battery of V volts.

Which of the following quantities remain constant 10tu the wire? Justify your answer. Explain briefly how these rules are justified. The current is drawn from a cell of emf E and internal resistance r connected to the network of resistors each of resistance r as shown in the figure. Obtain the expression for i the current draw from the cell and ii the power consumed in the network. A resistance of R draws current from a potentiometer.

The potentiometer wire, AB, psf a total resistance of R0. A hp V is supplied to the potentiometer. Derive an expression for the voltage 10h R when the sliding contact is in the middle of potentiometer wire. Chapter 4: Moving Charges and Magnetism 1. Describe the working principle of a moving coil galvanometer. Why is it necessary to use i a radial magnetic field and ii a cylindrical soft iron core in a galvanometer?

Write the expression for current sensitivity of the galvanometer. Can a galvanometer as such be used for measuring the current? Show that it behaves like a tiny magnetic dipole. Give the significance of negative sign. A long phyxics current carrying wire passed normally through the centre of circular loop. If the current through the wire increases, will there be an increase induced emf in the loop? Obtain the expression for the mutual inductance of two long co-axial solenoids S1 and S2 wound one over 10th physics ncert pdf up other, each of length L and radii r1 and r2 and n1 and n2 number of physocs per unit length, when a current I is set up in the outer solenoid S2.

Draw a labelled diagram of AC generator. Derive physic expression for the instantaneous value of the emf induced in the coil. A circular coil of cross-sectional area sq. Calculate the maximum value of the current in the coil. Chapter 7: Alternating Current 1. 10th physics ncert pdf up a labelled diagram of a step-up transformer. Obtain the ratio of secondary to primary voltage in terms of 10th physics ncert pdf up of turns and currents in the two coils.

A power transmission line feeds input power at V to a step-down transformer with its primary windings 10th physics ncert pdf up turns. Find the number of turns in the secondary to get the power output at V. 10th physics ncert pdf up the value pddf the phase difference between the current and the voltage in the series LCR circuit shown.

Which one leads in phase: current phyeics voltage? Without making any other change, find the value of the additional capacitor C1, to be connected in parallel with the capacitor C, in order to make the power factor of the circuit unity. Chapter 8: Electromagnetic Waves 1. How is the speed of em-waves in vacuum determined by the electric and magnetic fields? How does Ampere-Maxwell law explain the flow of current through a capacitor when 10th physics ncert pdf up is being charged by a battery?

Write the expression for the displacement current in terms of the rate of change of electric flux. A ray of light incident on face AB of an equilateral glass prism, shows minimum deviation of Calculate 10th physics ncert pdf up speed of light through the prism. Find the angle of incident at face AB so that the emergent ray grazes along ldf face AC. Rashmi Singh broke her reading glasses.

When she went to the shopkeeper 10th physics ncert pdf up order new spects, he suggested that 10th physics ncert pdf up should get spectacles with plastic lenses instead of glass lenses. On getting the new spectacles, she found that physicx new ones could not offer satisfactory explanation for. At home, Mrs. Singh raised the same question 10th Class Physics Notes Pdf Ncert Lab to her daughter Anuja who pyysics why plastic lenses were phtsics.

Chapter Wave Optics 1. Why should the objective of a telescope have large focal length and large aperture? Distinguish between unpolarised light and linearly polarised light.

How does one ncerh linearly polarised light with the help of a Polaroid? A narrow beam of unpolarised light of intensity Nccert is incident on a Polaroid P1.

The light transmitted by it is ldf incident on a second Polaroid P2 with 10th physics ncert pdf up pass axis making angle of 60 relative to the pass axis of P1. Find the intensity of the light transmitted by P2. A monochromatic light of wavelength nm is incident normally on a single slit of width 0.

Find the angular width of the central maximum obtained on the screen. In the study of photoelectric effect the graph between the stopping potential V and frequency v of the incident radiation on two different metals P and Q is shown below:. Chapter Atoms 1. Find the wavelength of the electron orbiting in the first exited state in hydrogen atom. Define the distance of closest approach.

Write two important limitations of Rutherford pef model of the atom. The mass number and atomic number pef A2 are and 71 ppdf. Determine the mass and atomic number of A4 and A.

Name the junction diode whose I-V characteristics are drawn below:. Zener diode is fabricated by heavily doping both p- and n- sides of the junction.

Explain, why? Briefly explain the use of Zener diode as a dc voltage regulator with the help of a circuit diagram. Distinguish between a transducer and a repeater. Explain any two factors which justify the need for modulating a low frequency base-band signal.

Visit to discussion forum 10th Ncert Physics Pdf 2016 to ask lhysics doubts. Select the Chapter for 12th Physics Solutions. Useful Resources. Important Questions on 12th Physics When a glass rod is rubbed with a silk cloth, charges appear on. A similar phenomenon is observed with many other pairs of bodies. Explain how this observation is consistent with 10th physics ncert pdf up law of conservation of charge. Rubbing produces charges of equal magnitude but of opposite nature on the two bodies because charges are created in pairs.

This phenomenon of charging is called charging by friction. The net charge on the system of two rubbed bodies is zero. This is 10th Class Physics Notes Pdf Ncert Write because equal amount of opposite charges annihilate each. When a glass rod is rubbed with a silk cloth, opposite nature charges appear on both the bodies.

This phenomenon is in consistence with the law of conservation of energy. Three capacitors of capacitances 2pF, 3pF and 4pF are connected in parallel. What is the total capacitance of the combination? Guess a possible reason why water has a much greater dielectric constant 80 than say, mica 6. Water has an unsymmetrical space as compared to mica.

Since it has a permanent dipole moment, it has a greater dielectric constant than mica. A steady current flows in a metallic conductor of non-uniform cross- section. Which of 10th physics ncert pdf up quantities is constant along the conductor: current, current density, electric field, drift speed? When a steady current flows in a metallic conductor of non-uniform cross-section, the current flowing through the conductor is constant.

Current density, electric field, and drift speed are hcert proportional to the area of cross-section. Therefore, they are not constant. A square coil of side 10 cm consists of 20 turns and carries a current of 12 A.

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