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2011年全国18套高考理综卷中,有7套以复合场问题作为压轴题,可见,复合场问题在高考备考中的重要性。复合场问题是指重力场、电场、磁场三者共存,或其中任意两者共存,这就决定了带电粒子在复合场中运动时至少受到两种以上场力的作用,因此对粒子的运动性质分析就显得尤为重要。复合场问题虽然运动形式复杂,但是题目内在的规律性也很强,只要把握了规律,再难的复合场问题也可以攻克。下面结合例题作详细分析。
In 2011, 18 sets of college entrance examination in the country comprehensive volume, there are 7 sets of composite field problem as a finale, we can see that the problem of composite field in the college entrance examination pro forma in the importance. The problem of complex field means that the gravitational field, the electric field and the magnetic field coexist, or any two of them coexist, which determines that the charged particles are affected by at least two kinds of field forces when they move in the compound field. Therefore, Analysis is particularly important. Although the form of complex field is complex in form of movement, the inherent regularity of the problem is also very strong. So long as the law is mastered, the complex field problem can be overcome. The following combination of examples for detailed analysis.