初二物理学习方法(国外英文资料).docVIP

初二物理学习方法(国外英文资料) Two learning methods: junior high school physics experiment formula Adjust the balance of the balance beam Before weighing the physical balance, the pointer should refer to the center of the scale. If the pointer is on the left side of the ruler, the left screw of the cross beam is adjusted to the left, or the right end screw of the cross beam is adjusted to the left, so that the pointer can be returned to the center of the gauge. When the pointer slants to the right, the cross member screw (whether left or right end of the screw) should be adjusted to the right, and the direction of the cross beam screw can be generalized as: Left, left, or left, Right, right, right, or right. The indicator of the tray balance is above the beam, so the adjusting direction of the cross beam screw is contrary to the physical balance. Just memorize the physical balance formula, associative memory tray balance screw to be different, they will not be confused. (two) the use of sliding rheostat The sliding rheostat is divided into two layers, the upper and lower resistance wire rod of each of the two terminals, in order to change resistance, should be used on each with a terminal. Can be called: Up and down, each with a. According to the connection method, when connecting the object, the connection direction of the sliding rheostat in the circuit diagram need not be rigidly controlled, thus selecting the short distance and avoiding the cross wiring mode. (three) the method of connecting circuits Connect with parallel circuit loop, can only connect a conductor parallel conductor, the voltmeter also temporarily access circuit, which is connected with a first series circuit, and then the parallel conductor and a voltmeter connected into the circuit. This method is called the entry First string and then merge. In doing so, the beginner can play a difficult role. (four) a method of preventing read wrong data The measuring directions of the physical measuring tools are differe