PHYS1033 EXAM 2C (April 6, 2020) Physics constants: e=1.6x10-19 C, ke = 1/4πε0 = 8.99x109 Nm2/C2, Micro (μ) = 10-6, Nano (n) = 10-9 Select the closest answer if each problem. Write the correct answer...

Please solve the 15 problems and upload your answer sheet.

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PHYS1033 EXAM 2C (April 6, 2020) Physics constants: e=1.6x10-19 C, ke = 1/4πε0 = 8.99x109 Nm2/C2, Micro (μ) = 10-6, Nano (n) = 10-9 Select the closest answer if each problem. Write the correct answer symbol (A – E) on the answer sheet. Please upload your answer sheet to CANVAS. There is the [EXAM2] folder in the [Assignment] tab. The folder will be opened from 11 am to 1pm TODAY. No e-mail submission. Good luck. 1. A small charged ball of mass 0.060g floats when placed in an electric field of magnitude 550 N/C pointing vertically downward. The charge on the ball is: (A) +0.11 μC (B) −0.11 μC (C) +1.1 μC (D) −1.1 μC (E) None of the above 2. A 50 μF capacitor is connected to a 12V battery. The energy stored in the capacitor is: (A) 1.2x10-3 J (B) 2.5x10-3 J (C) 3.6x10-3 J (D) 7.2x10-3 J (E) None of the above 3. Three capacitors: 4.0 μF, 2.0 μF, and 6.0 μF are connected in series in this order across a 12V battery. The potential difference across the 4.0 μF capacitor is: (A) 6.5 V (B) 4.8V (C) 3.3V (D) 2.2V (E) None of the above 4. A metal wire with a 0.20 mm2 cross-section draws a current of 0.60A when connected to a 1.5V battery. The resistivity of the metal is 1.7x108 Wm. The length of the wire is: (A) 18 m (B) 29 m (C) 67 m (D) 110 m (E) None of the above 5. A 33Ω resistor is in series with a 56Ω resistor and an 81Ω resistor, the two of which are parallel. The current drawn from a 33V source is: (A) 0.30 A (B) 0.50A (C) 0.90A (D) 1.0A (E) None of the above 6. The electric potential due to a 6.0 μC point charge at a point A is measured at 21 kV. The distance of the point from the charge is: (A) 1.8 m (B) 2.6 m (C) 3.1 m (D) 3.5m (E) None of the above 7. A parallel plate capacitor is made of two circular plates of 25 cm radius separated by 2.5 mm of air. The charge on each plate of the capacitor when charges to 750V is: (A) 0.84 μC (B) 0.52 μC (C) 0.24 μC (D) 0.045 μC (E) None of the above 8. A pair of identical 12V batteries, each storing 2.0x105 J of energy, are connected in series. How long can they supply 70A? (A) 4.0 min (B) 8.0 min (C) 16 min (D) 24 min (E) None of the above 9. Two resistors, 6.0Ω and 9.0Ω connected in parallel, are in series with another combination of two resistors, 8.0Ω and 12Ω also parallel. The net resistance of the combination is: (A) 6.0Ω (B) 8.4Ω (C) 12Ω (D) 15Ω (E) None of the above 10. Three point charges are placed along the x-axis: a -4.0 μC at x = 0, a +3.0 μC at x = 0.30 m, and a +5.0 μC at x = 0.60 m. The force on the +5.0 μC charge is: (A) –1.0N (B) 1.0N (C) 1.6N (D) -16.6N (E) None of the above 11. A charge of +4.0 μC is located on the x-axis at x =0.80 m and another charge of -6.0 μC is located on the y-axis at y=1.0 m. The magnitude of the electric field at the origin is: (A) 6.3x104 N/C (B) 7.8x104 N/C (C) 4.7x104 N/C (D) 6.6x104 N/C (E) None of the above 12. A 0.50 A current flows through a light bulb for 1.2 hours. The number of electrons passing through the resistor of the bulb is: (A) 1.4x1022 (B) 3.5x1022 (C) 2.1 x1022 (D) 4.2x1022 (E) None of the above 13. The maximum voltage that can be applied to 500Ω resistor that is rated at 0.45W is: (A) 15V (B) 24V (C) 35V (D) 45V (E) None of the above 14. Two resistors, 80Ω and 100Ω, are connected in series with a power source. The voltage across the 100 Ω resistor is found to be 25V. What ids the voltage supplied by the power source? (A) 14V (B) 30V (C) 45V (D) 50V (E) None of the above 15. The speed an electron (m=9.1x10-31 kg) at rest attains after 1.0 ns in a 5.7x104 N/C electric field is: (A) 1.0x107 m/s (B) 2.2x107 m/s (C) 3.7x107 m/s (D) 4.0x107 m/s (E) None of the above PHYS1033 EXAM2C Answer Sheet Type your NAME: _________________________ Select and type the correct answer (from A to E) of each problem. Problem # Correct Answer 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15