Direction: Read each item carefully and choose the letter of the correct answer. 1. What is the use of a capacitor? a. store electrical energy b. store magnetic energy c. vary the resistance d. dissipate energy 2. What do you call the ability of the capacitor to store charge? a. resistance b. friction c. Coulomb's force d. capacitance 3. A circuit contains two capacitors in series, with capacitances of 8F and 20F. What is the equivalent capacitance of this circuit? a. 28.0F b. 14.0F c. 8.3F d. 5.7F 4. Which of the following is true for capacitors connected together in parallel? a. All capacitors in parallel store the same amount of charge. b. All capacitors in parallel must have the same c. All capacitors in parallel have the same voltage across their plates. have the same voltage across their plates d. All capacitors in parallel have the same current through them. 5. What is the equivalent capacitance if 4µF and 2μµF capacitors are connected in series? a. 0.75µF b. 1.33µF c. 2.00μF d. 6.00μF

Simply the circuit to get the equivalent circuit. Show all circuits step by step. R1= 8 ohms, R2= 30 ohms, R3= 6 ohms, R4= 9 ohms, V= 54V  A. What is the equivalent resistance?B. What is the current in R2?C. What is the potential difference across R3?D. What is the power dissipated in R4?

I. Multiple Choice. Understand the following statements carefully. Write the letter of your answer in the blank before each number. _1. Four cells each of emf E are joined in parallel to form a battery. The equivalent emf of the battery will be A. 4 E В. Е 2. Electromotive force of a battery can be defined with the formula C. E/4 D. E = 0 A. E = IR B. E = IR + 1 C. E = IR + r _3. Potential difference of a battery is 2.2 V when it is connected across a resistance of 5 Q, if suddenly D. E = IR + Ir potential difference falls to 1.8 V, its internal resistance will be В. 1.1 Q A. 10 C. 20 D. 2.10 4. If a 6 V and a 9 V source are connected series aiding, the total voltage is А. 3V 5. If a 24 V and a 6 V battery àre series opposing, the total voltage is В. 6V C. 15 V D. 9 V A. 18 V B. 24 V C. 30 V D. 20 V

a. Linearise the equation above and state which variable you would plot on the x-axis and which on the y- axis. b. How are E and r related to the gradient and or y-intercept of the graph?