Equations are needed to calculate the dissipated power in a circuit. P = VI P = 12R P = V2/R Where; P = power in Watt (W) V = voltage in Volt (V) I = current in Ampere (A)Activity 1: emf or PD? Directions: Identify the statement below whether an emf or PD. Write E if the statement shows electromotive force, and P if the statement shows potential difference. 1. The energy supplied to the unit charge by the cell. E 2. The energy dissipated as the unit charge passes through the components. P 3. Present even when no current is drawn through the battery. E 4. across the conductor is zero in the absence of current. P 5. Its unit is volt, and symbol is E. E 6. Its unit is volt, and symbol is V. P 7. It is always greater than potential difference. E 8. It is always less than emf. P 9. It transmits current both inside and outside of the cell. E 10. transfer current between two points in the cell. P 11. Its formula is E = I(Rtr); where Rtr stands for total internal and external resistance E 12. Its formula is V = E - Ir P 13. It does not depend on circuit resistance. E14. It directly depends on the resistance between two points of measurement. P 15. It causes electric, magnetic and gravitational field. E 16. It induces only in an electric field. PActivity 3: Power Dissipated in a circuit Calculate the power dissipated in each resistor. (series-parallel circuit) V2 = V, R1 380 E = Vi+V, E 1 = 12+13 25V R2 209 3001. 5000 J of work would be done to carry how much charge between two points having potential difference of 100 V? a. 500 C b. 5 C c. 0.5 C d. 50 C 2. In a parallel circuit, how does dissipated power related to resistance? (Refer to the equation P=V2/R for your answer.) a. Power is inversely proportional to the voltage. b. Power is inversely proportional to the resistance. c. Power is directly proportional to the resistance. d. Power is directly proportional to the voltage. 3. In equation P =V2/R, how does power relate to resistance? a. power is directly proportional to resistance. b. the greater the power, the greater the resistance. c. power is inversely proportional to the resistance. d. the lesser the resistance, the lesser the power. 4. The energy dissipated in a resistor is converted to 2 a. heat b. current c. voltage d. resistance5. What power is dissipated in a circuit through which 0.12 A flows across a potential drop of 3.0 V? a. 0.36 W b. 0.011 W C. 5 V d. 2.5 WIn your previous lesson, let us recall the current, resistance, and resistivity. Write the term/s on the space provided. 1. An electrical quantity measure by determining the number of charges q passing through a perpendicular cross-section of the conductor per unit time t. 2. It is the proportionality constant with the Greek symbol p means "rho". 3. The type of a wire used for electrical wirings. 4. It is the relationship between the number of charges passing through a conductor to the current from the formula I=Q/t. 5. The relationship between the temperature and resistance