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EXAM 2!!

EXAM 2!!. Cheat sheet #1 and #2 are on line. YOU’RE going to need to Memorize the 3 Right-Hand rules!. You will need : Writing utensils Calculator (NO PHONES) Your wits. You will Get : Cheat sheet #2 with test

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EXAM 2!!

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  1. EXAM 2!! Cheat sheet #1 and #2 are on line. YOU’RE going to need to Memorize the 3 Right-Hand rules! You will need: Writing utensils Calculator (NO PHONES) Your wits You will Get: Cheat sheet #2 with test Cheat sheet #1 will be available if you need it.

  2. 1) What is the total resistance of the circuit? A) 80  B) 55  C) 50  D) 35  Diff: 2

  3. 2) Three resistors of 12, 12, and 6.0 are connected in series. A 12-V battery is connected to the combination. What is the current through the battery? A) 0.10 A B) 0.20 A C) 0.30 A D) 0.40 A Diff: 2 Page Ref: Sec. 19.2

  4. 3) 5.00 mF, 10.0 mF, and 50.0 mF capacitors are connected in series across a 12.0-V battery. How much charge is stored in the 5.00-mF capacitor? A) 12.5 mC B) 25.0 mC C) 37.5 mC D) 50.0 mC Diff: 2 Page Ref: Sec. 19.5

  5. 4) A 2.0-m wire carrying a current of 0.60 A is oriented parallel to a uniform magnetic field of 0.50 T. What is the magnitude of the force it experiences? A) zero B) 0.15 N C) 0.30 N D) 0.60 N Diff: 1 Page Ref: Sec. 20.3

  6. 5) An electron moves with a speed of 5.0 × 104 m/s perpendicular to a uniform magnetic field of 0.20 T. What is the magnitude of the magnetic force on the electron? A) 4.4 × 10-14 N B) 1.6 × 10-15 N C) 2.6 × 10-24 N D) zero Diff: 1 Page Ref: Sec. 20.4

  7. 6) A very long straight wire carries a current of 25 A. What is the magnitude of the magnetic field at a distance of 0.15 m from the wire? A) 3.3 × 10-5 T B) 6.6 × 10-5 T C) 3.3 × 10-6 T D) 6.6 × 10-6 T Diff: 1 Page Ref: Sec. 20.5

  8. 7) A circular loop of radius 0.10 m is rotating in a uniform magnetic field of 0.20 T. Find the magnetic flux through the loop when the plane of the loop and the magnetic field vector are perpendicular. A) zero B) 3.1 × 10-3 T m2 C) 5.5 × 10-3 T m2 D) 6.3 × 10-3 T m2 Diff: 1 Page Ref: Sec. 21.1-21.2

  9. A square coil of wire with 15 turns and an area of 0.40 m2 is placed parallel to a magnetic field of 0.75 T. The coil is flipped so its plane is perpendicular to the magnetic field in 0.050s. What is the magnitude of the average induced emf? A) 6.0 V B) 36 V C) 45 V D) 90 V Diff: 2 Page Ref: Sec. 21.1-21.2

  10. 9) In a transformer, how many turns are necessary in a 110-V primary if the 24-V secondary has 100 turns? A) 458 B) 240 C) 110 D) 22 Diff: 1 Page Ref: Sec. 21.7 primary secondary 24V 110 V ? 100 So ….

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