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Physics 196 Practice Test 2

# Physics 196 Practice Test 2 - Name Class Date ID A Physics...

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Unformatted text preview: Name: Class: Date: ID: A Physics 196 Midterm Exam II Practice Test Multiple Choice Identiﬁi the choice that best completes the statement or answers the question. 1. How much energy is dissipatedas heat during a two-minute time interval by a 1.5441 resistor which has a constant 20-V potential difference across its leads? a. 58.! b. 46 J c. 32 J (1. 7'2] 3. 16 J ____ 2. How many electrons pass through a 20-0 resistor in IO min ifthere is a potential drop of30 volts across it? a 5.6 x 103’ b. "LS x 1021 c. 9.4 x 103‘ d 1.1 x 103' e 3.3 X 1021 3. If a mile of 24-gauge copper wire has a resistance of 0.14 kn and the resistivity of copper is 1.7 x 10—3 Q - m, what is the diameter ofthe wire? (1 mile = 1.6 km) a. 0.40 mm b. 0.50 mm c. 0.63 mm d 0.80 mm c 0.25 mm 4. What is the current in the 10-9 resistor ? 5f). a. 0.60 A b. 3.0 A c. 1.2 A d. 2.4 A e. 0.30 A Name: : A 5. Determine the magnitude and sense (direction) of the current in the 10-9 resistor when I = 1.8 A. 10!} 1.6 A right to left 1.6 A left to right 1.2 A right to left 1.2 A left to right 1.8 A left to right 6. What is the potential difference VB — VA when I = 0.50 A in the circuit segment shown below? PP-F‘P‘P 109 161C} AWIIWB — «1- rev a +28V b. +2.0v c. —28V d —2.0V e +18V 7. A particle (q = 5.0 nC, m = 3.0 Jmg) moves in a region where the magnetic ﬁeld has components .15:r = 2.0 mT, 3,, = 3.0 mT, and Bz = —4.0 mT. At an instant when the speed ofthe particle is 5.0 kaS and the direction of its velocity is 120° relative to the magnetic ﬁeld, what is the magnitude of the acceleration of the particle? a. 33 ml’s2 b. 17 ml’s2 c 39 111st d. 25 111152 e. 45 111st 8. A straight wire carries a current of 40 A in a uniform magnetic ﬁeld (magnitude = 80 mT). If the force per unit length on this wire is 2.0 me, determine the angle between the wire and the magnetic field. a. either 39° or 141° b. either 25° or 155° c. either 70" or 110° d. either 42° or 138° 6. either 65° or 115° Name: 1]): A 9. A straight wire is bent into the shape shown. Determine the net magnetic force on the wire when the current I travels in the direction shown in the magnetic ﬁeld B. ZIBL in the —z direction a. b. ZIBL in the +2 direction c. 41.31. in the +2 direction d. 4131, in the —z direction e. zero 10. A current of 4.0 A is maintained in a single circular loop having a circumference of 80 cm. An external magnetic ﬁeld of 2.0 T is directed so that the angle between the ﬁeld and the plane of the loop is 20°. Determine the magnitude of the torque exerted on the loop by the magnetic forces acting upon it. a. 0.41 N - m b. 0.14N - m c. 0.33 N - m d. 0.2?N - rn e. 0.7? N - m Physics 196 Midterm Exam 11 Practice Test Answer Section MULTIPLE CHOICE 1. ANS: C PTS: 1 2. ANS: A PTS: 1 3. ANS: B PTS: 1 4. ANS: A PTS: 1 5. ANS: A PTS: 1 6. ANS: A PTS: 1 T. ANS: C PTS: ] 8. ANS: A PTS: 1 9. ANS: B PTS: 1 10. ANS: C PTS: 1 1]): ...
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Physics 196 Practice Test 2 - Name Class Date ID A Physics...

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