2010届高考物理经典例题专题剖析1（2010 college entrance examination of physics classic example analysis 1）.docVIP

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2010届高考物理经典例题专题剖析1（2010 college entrance examination of physics classic example analysis 1）.doc

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2010届高考物理经典例题专题剖析1（2010 college entrance examination of physics classic example analysis 1）

2010届高考物理经典例题专题剖析1（2010 college entrance examination of physics classic example analysis 1） Thematic analysis of college entrance examination in 2010 two round review of classic examples of physics: The presence of the motion of charged particles 1. cases as shown in a horizontal direction of the electric field lines AB (field lines not marked, a charged particle) is the right level constant tension (without gravity) released from rest at the point A, the charged particles along the AB direction of movement, after B the speed is zero, then the following conclusions are correct () A. A, the B particles move in between two points, the numerical work of constant force is greater than the particle in the electric potential difference between two points of the absolute value of AB B. may be potential potential A point above the B point, A point may also be potential potential lower than B point C.A may be greater than the field strength at B D. particle motion is not uniform motion, also may not be uniformly accelerated motion Analysis: according to the theorem of kinetic energy, constant force do positive work with electric force do negative work, the value is equal, i.e. constant work with the electric potential of the absolute value of the difference should be equal, A error; charged particles from A starting from rest to the B movement, after B when the speed is zero, which indicates that the charged particles in the effect of constant force and electric field force under accelerated motion after deceleration, so the motion of the particle is not uniform motion. At the same time show that the electric field in the direction of the force to the left. The first particle accelerated motion, force constant electric field is greater than the level of the left to the right level, after deceleration, shows that the constant electric field force is greater than the level of the left then right level, so the particle could not be uniformly accelerated motion, the D option is