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Discharging a capacitor ---answers----the process of releasing the stored electrical energy in a capacitor. Testing a capacitor ---answers----using a dmm to check the capacitance and integrity of a capacitor. Effect of a capacitor ---answers----in a dc circuit, a capacitor blocks de and allows ac to pass. In an ac circuit, a capacitor causes a phase shift between voltage and current. Total capacitance and capacitive reactance ---answers----the formula for calculating total capacitance in series is: c_t = 1/(1/cl + 1/c2 + ... + 1/cn). For connected in parallel, the total capacitance is the sum of the individual capacitances. The formula for calculating total capacitance in parallel is: C_t=cl+c2+...+cn Ac circuit with capacitors ---answers----the calculation of total load on an ac circuit with capacitors. Time to charge and discharge a capacitor ---answers----the calculation of the time required for a capacitor to charge or discharge. Functions of capacitors and inductors in an electric power supply ---answers----capacitors store electrical energy and provide reactive power, while inductors store magnetic energy and provide reactive power. Reactive symbols ---answers----symbols used to represent reactive components in electrical schematics. Series-parallel circuits ---answers----combination of series and parallel circuits in an electrical circuit. Solving a combination circuit ---answers----the process of analyzing and calculating the values of components in a combination circuit. Variable resistors ---answers----resistors whose resistance can be adjusted. Voltage divider network ---answers----a circuit arrangement that divides the input voltage into smaller voltages. Troubleshooting a short circuit ---answers----the process of identifying and fixing a circuit with a direct connection between the power source and ground. Designing a control transformer circuit ---answers---- creating a circuit using a control transformer to achieve a specific output voltage. Tap on the secondary of a transformer ---answers----a connection point on the secondary winding of a transformer that allows for voltage adjustment. Ground ---answers----the connection of an electrical circuit to the earth. Ten rules of electrical safety ---answers----a set of guidelines to ensure safe practices when working with electricity. Lockout / tag out ---answers----a safety procedure used to disable machinery or equipment to prevent hazardous energy release. Types of electrical current ---answers----direct current (dc) and alternating current (ac). Circuit tester ---answers----a device used to test the presence of voltage in an electrical circuit. Components of an electrical circuit ---answers----power source, load, conductor, and control device. Types of power supplies ---answers----dc power supply and ac power supply. Schematic symbols ---answers----visual representations of electrical components used in electrical schematics. Manual switch operators ---answers----toggle switch, push button switch, selector switch, key switch, and rotary switch. Electrical output devices ---answers----lamp, motor, solenoid, buzzer, and relay. Voltage ---answers----the electrical potential difference between two points in a circuit. Unit of measurement: volts (v). Voltmeter ---answers----a device used to measure voltage in an electrical circuit. Voltage characteristics in series and parallel circuits --- answers----in series circuits, voltage adds up. In parallel circuits, voltage is the same across all components. Current ---answers----the flow of electric charge in a circuit. Unit of measurement: amperes (a). Series and parallel resistance ---answers----the calculation of total resistance in series and parallel circuits. Ohm's law ---answers----a mathematical equation relating voltage, current, and resistance in an electrical circuit. Kirchhoff's voltage law ---answers----the sum of voltage drops in a series circuit is equal to the applied voltage. Series and parallel voltage ---answers----in a series circuit, the current flows through all the components in the same path. As a result, the total voltage across the circuit is equal to the sum of the voltages across each of the components. In a parallel circuit, the current can flow through multiple paths. As a result, the voltage across each of the components in a parallel circuit is the same. The total current in the circuit is equal to the sum of the currents through each of the components. Power ---answers----the rate at which work is done or energy is transferred in an electrical circuit. Unit of measurement: watts (w). Total power ---answers----the calculation of total power ina circuit. Kirchhoff's current law ---answers----the sum of currents entering a node is equal to the sum of currents leaving the node. Series and parallel current ---answers----the calculation of total current in series and parallel circuits. Circuit protection ---answers----devices used to protect electrical circuits from overcurrent or short circuits. Circuit breakers ---answers----automatic switches that protect electrical circuits from overcurrent. Electrical schematics and wiring diagrams ---answers---- visual representations of electrical circuits and their connections using symbols. Electromagnetism ---answers----the interaction between electricity and magnetism. Inductance ---answers----the property of an electrical circuit that opposes changes in current. Unit of measurement: henries (h). Effect of an inductor ---answers----in a dc circuit, an inductor resists changes in current. In an ac circuit, an inductor causes a phase shift between voltage and current. 
