Test1 - Physics 106 Sections 1 & 2 Midterm Exam #1 Fall...

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Midterm Exam #1 – Fall 2011 Instructor: Lawrence Rees 3-digit CID: _______ This test has 25 problems. The CID is only used to return your test. If you forgot it, make one up. Do NOT write your name. Mark the best answer for each problem on the answer form (the bubble sheet). Be careful to enter your answers correctly. Your bubble sheet answer is your final answer. No notes or written materials are allowed except for a foreign language dictionary. You may not use equations or other information stored in your calculator. Possible useful information ݇ = 8.99 × 10 ±ܰ݉ / ܥ ߳ = 8.85 × 10 ିଵଶ ±ܥ /( ܰ݉ ) ݁ = 1.60 × 10 ିଵଽ ±ܥ Charging capacitors: ܳ = ܳ (1 − ݁ ି௧ /( ோ஼ ) ) Discharging capacitors: ܳ = ܳ ݁ ି௧ /( ோ஼ ) The long side of a battery is positive. ݌ = 10 ିଵଶ ±±±݊ = 10 ିଽ ±±±ߤ = 10 ି଺ ±±±݉ = 10 ିଷ ±±±݇ = 10 ±±ܯ = 10 ±±±ܩ = 10 ±±±ܶ = 10 ଵଶ 1. Two charges are placed along the x axis of a coordinate system. A charge of +20 μC is placed at x = +20 cm and a charge of –20 μC is placed at x = –20 cm. What is the force on a test charge of +2 μC located at the origin? A. 8.99 × 10 N in the + x direction B. 8.99 × 10 N in the – x diection C. 4 50 × 10 N in the + x direction D. 4.50 × 10 N in the – x diection E. 8.99 N in the + x direction F. 8.99 N in the – x diection G. 18.0 N in the + x direction H. 18.0 N in the – x diection I. The force is zero. 2. Two charges are placed along the x axis of a coordinate system. A charge of +20 μC is placed at x = +20 cm and a charge of –20 μC is placed at x = –20 cm. What is the electric field at the origin? A. 8.99 × 10 V/m in the + x direction B. 8.99 × 10 V/m in the – x diection C. 4 50 × 10 V/m in the + x direction D. 4.50 × 10 V/m in the – x diection E. 8.99 V/m in the + x direction F. 8.99 V/m in the – x diection G. 18.0 V/m in the + x direction H. 18.0 V/m in the – x diection I. The electric field is zero.
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3. Two charges are placed along the x axis of a coordinate system. A charge of +20 μC is placed at x = +20 cm and a charge of –20 μC is placed at x = –20 cm. What is the electric potential (voltage) at the origin?
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Test1 - Physics 106 Sections 1 & 2 Midterm Exam #1 Fall...

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