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2. b) The area and separation of a parallel-plate capacitor are 1.8 cm² and 0.66 mm, respectively. The gap between the plates is filled with an insulating sheet of dielectric constant 2.2. i. Determine the potential difference between the plates when the charges on the plates is 5.2 ?C. ii. How much energy can be stored in this capacitor? [3 marks] 3. FIGURE Q3 shows the path taken by the current through a piece of material. The rectangular piece is made from a material with a resistivity of ? = 1.45 x 10?² ?.m when it is at 20°C and has a unit length, L? of 6.00 cm. The material is connected to a 4.00 V battery. i. Calculate the resistance of the material. ii. Determine the power consumed by the material. iii. If the temperature is raised to 45°C, the resistance increases to 1.50 ?. Find the temperature coefficient. FIGURE Q3 [ 7 marks] 4. a) For the circuit shown in FIGURE Q4a, the current that flows through the 7.0 ? resistor is 1.8 A. Assume each emf has negligible internal resistance, determine the value of the emf ?. Show all calculation steps FIGURE Q4a [4 marks]

          2. b) The area and separation of a parallel-plate capacitor are 1.8 cm² and 0.66 mm, respectively. The gap between the plates is filled with an insulating sheet of dielectric constant 2.2. i. Determine the potential difference between the plates when the charges on the plates is 5.2 ?C. ii. How much energy can be stored in this capacitor? [3 marks] 3. FIGURE Q3 shows the path taken by the current through a piece of material. The rectangular piece is made from a material with a resistivity of ? = 1.45 x 10?² ?.m when it is at 20°C and has a unit length, L? of 6.00 cm. The material is connected to a 4.00 V battery. i. Calculate the resistance of the material. ii. Determine the power consumed by the material. iii. If the temperature is raised to 45°C, the resistance increases to 1.50 ?. Find the temperature coefficient. FIGURE Q3 [ 7 marks] 4. a) For the circuit shown in FIGURE Q4a, the current that flows through the 7.0 ? resistor is 1.8 A. Assume each emf has negligible internal resistance, determine the value of the emf ?. Show all calculation steps FIGURE Q4a [4 marks]

2. b) The area and separation of a parallel-plate capacitor are 1.8 cm² and 0.66 mm, respectively. The gap between the plates is filled with an insulating sheet of dielectric constant 2.2. i. Determine the potential difference between the plates when the charges on the plates is 5.2 ?C. ii. How much energy can be stored in this capacitor? [3 marks] 3. FIGURE Q3 shows the path taken by the current through a piece of material. The rectangular piece is made from a material with a resistivity of ? = 1.45 x 10?² ?.m when it is at 20°C and has a unit length, L? of 6.00 cm. The material is connected to a 4.00 V battery. i. Calculate the resistance of the material. ii. Determine the power consumed by the material. iii. If the temperature is raised to 45°C, the resistance increases to 1.50 ?. Find the temperature coefficient. FIGURE Q3 [ 7 marks] 4. a) For the circuit shown in FIGURE Q4a, the current that flows through the 7.0 ? resistor is 1.8 A. Assume each emf has negligible internal resistance, determine the value of the emf ?. Show all calculation steps FIGURE Q4a [4 marks]

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