PHY 214, Fall 2017 Exam 3 Chapters 27, 28, and 29 1. 3 3 6 1 2.0 A In the circui

Question

PHY 214, Fall 2017 Exam 3 Chapters 27, 28, and 29 1. 3 3 6 1 2.0 A In the circuit element shown, the current through the 6-2 resistor is approximately A) 1.0 A B) 2.0 A C) 0.40 A D) 0.67 A E) 1.3 A An alpha particle has a charge of +2e (e 1.6 x 10-19 C) and is moving at right angles to a magnetic field B 0.27 T with a speed v 6.15 x 10 m/s. The force acting on this charged particle is A) zero B) 5.3 × 10-14 N c) 3.3 x 10 N 2. D) 2.7 x 10N E) 4.8 × 105 N A 1000-turn solenoid is 50 cm long and has a radius of 2.0 cm. It carries a current of 8.0 A. What is the magnetic field inside the solenoid near its center? A) 2.0 x 102 T B) 3.2 x 10-3 T 3. D) E) 1.0 T 2.0×10-4 T c) 4.0 x 10T

Explanation / Answer

1) current through 6 ohms resistor

= 2 * 3 / (6 + 3)

= 0.67 A [option D]

2) F = q v B sin theta

= 2 * 1.6 * 10-19 * 6.15 * 105 * 0.27 * sin 90

= 5.3 * 10-14 N [option B]

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