CBSE TEST PAPER-01 CLASS - XII PHYSICS (Unit – Electrostatics) [ANSWERS] FV force between the charges in vaccuum = FM force between two charges in medium FV ⇒ Fm = k ⇒ if k increases‚ Fm decreases. Ans 01. Since K= Ans 02. Suppose rod P be negatively charged since it attracts rod R ⇒ R is positively charged since it repels rod Q ⇒ Q is negatively charged. So force between Q and R is attractive in nature. Ans 03. Since F = q E and a = F/m Since charge on proton
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Give some example of everyday vibrating object. which exhibit SHM‚ at least approximately? 1. The pendulum on an old clock. 2. A guitar string after it gets plucked 3. The vibrations of the little quartz crystal in a digital watch. 2. toys called Newton’s cradle 3. the motion of a piston in an engine and 4. the vibrations of the atoms in a solid. 5. A micromass particle of light exhibits SHM.The Reason is that it oscillates without any mass changes during its motion. Is the acceleration
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elGauss’ Law AP Physics C Electric Flux Let’s start be defining an area on the surface of an object. The magnitude is “A” and the direction is directed perpendicular to the area like a force normal. A E Flux ( or FLOW) is a general term associated with a FIELD that is bound by a certain AREA. So ELECTRIC FLUX is any AREA that has a ELECTRIC FIELD passing through it. We generally define an AREA vector as one that is perpendicular to the surface of the material. Therefore‚ you can
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The piezoresistive effect is given by (1 2 ) R R (1) where is the resistivity of the piezoresistor‚ depends on the doping concentration of the piezoresistors‚ ν is the Poisson’s ratio and is the mechanical strain induced in the diaphragm. The first part of the left hand side of equation 1 describes the piezoresistive effect and the second part defines the geometric effect. For piezoresistive materials like polysilicon‚ the piezoresistive effect dominates over geometric effect
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A mathematical model which is investigated the thermal and physical behavior of a dish/Stirling system is presented‚ then the system was designed‚ analyzed and optimized. There are many types of heat losses in the dish/Stirling system‚ such as convection and conduction heat losses and radiation heat losses by emission in the cavity receiver and reflection heat loss of solar energy in the parabolic dish. There are also internal and external conduction heat losses‚ energy dissipation by pressure drops
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Optical Properties of Quasicrystals: Negative Refraction Quasicrystals‚ or crystals that display the unusual property of non-periodicity (while remaining ordered)‚ were discovered in the 1980s by Dan Shechtman. A highly controversial topic‚ Shechtman did not produce a paper describing them for over two years after their discovery. However‚ within the past 30 years‚ the scientific community has come to accept them‚ reproduce them for study‚ and even award Dan Shechtman with a Nobel Prize for their
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EXERCISE 8 - Rotational Dynamics‚ Equilibrium of rigid body 1. If the torque required to loosen a nut that is holding a flat tire in place on a car has a magnitude of 40.0 N m‚ what minimum force must be exerted by the mechanic at the end of a 30.0-cm lug wrench to accomplish the task? 133 N 2. A steel band exerts a horizontal force of 80.0 N on a tooth at point B in Figure 1. What is the torque on the root of the tooth about point A? 0.64 Nm 3. Calculate the net torque (magnitude and
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CIEG-306 Fluid Mechanics Laboratory 2. Stability of a Floating Body Objective The objectives of this experiment are: 1. to measure the angle of inclination at which an eccentrically loaded body floats‚ 2. to observe the circumstances under which a floating body is unstable‚ and 3. to compare the observed results with theoretical predictions. Apparatus The apparatus consists of an open plastic box (‘barge’) which floats in water and carries a mast (Figure 1). A plumb-bob suspended from the
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Hyugen’s principle Every point on an advancing wave front provides a new point of source for the wave Predicts reflection‚ refraction und diffraction Maxwell’s equations All related equations and observations to electricity and magnetism into 4 little equations The electromagnetic spectrum The product of wavelength and frequency is speed is the speed of the wave: Photon Relationship between frequency and photon energy Planck’s Assumption:
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Practice Questions Chapter 5 States of Matter: 1. Identify distinguishing properties of solids‚ liquids and gases. Gas Pressure: 1. Calculate each of the following: (show your work) i. 740 torr = _______________ atm ii. 1.15 atm = _______________ in Hg iii. 780 mm Hg = _____________ Pa Gas Laws: 1. If a sample of 4.17 L of ethane gas at 95 C is cooled to -80 C at a constant pressure‚ what is the new volume? 2. Calculate the volume occupied by 8.072g of neon gas at a temperature
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