![]() V – applied voltage, measured in volts (V). Where P in – input power, measured in watts (W) The consumed electrical power of the motor is defined by the following formula: For any given resistance (in the motors it is basically the resistance of the coil) this formula explains that the current can be controlled by applied voltage. You may calculate the resistance of your motor by measuring the consumed current and applied voltage. This formula could be used in many cases. V – applied voltage, measured in volts (V) ![]() Where I – current, measured in amperes (A) It states that current through the conductor is directly proportional to applied voltage and is expressed as: One of the most important laws of physics is the fundamental Ohm’s Law. ![]() This is modern metric system that is officially accepted in electrical engineering in the USA. We will use the International System of Units (SI). It is very important to measure different electrical and mechanical parameters of your motor and calculate unknown values using the following helpful formulas. Good science project does not stop with building a motor.
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