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在2015年10月与2016年4月举行的浙江省物理选考(“新高考”)加试题部分连续两次考察动量定理和电磁感应,而且都是平均安培力与感应电流(电荷量)问题相结合问题。考虑到选考加试考点的局限性和特殊性,这类问题可能在选考加试部分会多次出现,下面以这两次的加试题为例谈谈基于动量定理与电磁感应规律活用安培力冲量的两类常见问题。一、安培力冲量问题磁场中的导体棒通有电流,如果只受到安培力,其冲量即为导体棒动量的变化。对于导体棒问题,
In October 2015 and April 2016 held in Zhejiang Province physical examination ( “new entrance exam ”) plus two consecutive examinations momentum theorem and electromagnetic induction, and are the average amperage and the induced current (the amount of charge ) The problem of combining problems. Taking into account the limitations of the test plus test points and the particularity of such questions may appear in the test part of the test will appear many times, the following two questions plus questions as an example to talk about the law of momentum and electromagnetic induction based on the law of the use of ampere Force impulse of two types of common problems. First, the Ampere force impulse problem Magnetic field in the conductor bar through the current, if only by Ampere force, the impulse is the conductor rod momentum changes. For the conductor bar problem,