Physics 30 / Module 4 Assessment Provide your solutions on a separate sheet of paper and submit all pages combined as a SINGLE PDF file. For each question you need to show all elements of GRASP: . Write what is Given and Required or provide a labeled diagram. . Analyze the necessary formula(e) and rearrange if necessary. . Substitute into the formula and include units, and . Paraphrase the final answer with correct significant digits, units, and direction (for vector quantities) For written response, answer concisely with full sentences. Magnetic Fields 1. In the diagram below, a compass is placed under the conductor and the conductor is carrying conventional current from A to B. In which direction will the compass needle point? answer here 2. In the diagram below, the compass is pointing toward the right side of the page. In which direction are the electrons flowing in the conductor, A to B or B to A? to 3. In the diagram below, the circle represents the cross-section of a conductor. The direction of the electron flow is represented by the dot in the centre of the conductor. In what direction will a compass needle point if it is placed at point P? 4. In the diagram, electrons are flowing from A to B. Which end of the solenoid becomes the north pole? B5. Is the North Magnetic Pole area on Earth a North Pole or a South Pole? Explain using a diagram of the Earth's magnetic field. 6. For the following diagram, what is the direction of the deflecting force if the particle is a: A. proton? B. fluoride ion? S x N particle Moving Charges in Magnetic Fields 7. What is the magnetic field strength if a deflecting force of 0.0010 N is produced on a 7.5 mC particle entering the field at 30" relative to the field lines with a speed of 30 m/s? 8. An electron travelling north enters a magnetic field directed south. Explain what you would expect to observe as the electron enters the magnetic field. N 9. An electron with a speed of 1.2 x 10' m/s enters a magnetic field of 0.0020 T at 90" to the field as shown in the diagram. Determine the instantaneous acceleration (magnitude and direction) of the electron as it just enters the magnetic field. S 10. Electron current is flowing from A to B. Predict the direction of movement of the conductor. A N B 11. In the diagram below, a 30 cm wire carries a current of 20 A through a 10 cm wide magnetic field of 2.0 T. What is the deflecting force on the conductor? S NPHYSICS DATA SHEET Constants Prefixes Used with SI Units Particles Acceleration Due to Gravity Exponential Charge Mass Near Earth........ lag| = 9.81 m/s2 Prefix Symbol Value Gravitational Constant ...... G =6.67 x 10-1 N.m2/kg2 10-18 Alpha Particle.......... +2e 6.65 x 10-2 kg atto .... Radius of Earth ................ Me =6.37 x 100 m femto ...... f .........10-15 Electron .... 9.11 x 10 3 kg Mass of Earth.. Me = 5.97 x 1024 kg pico..... P............ 10-12 Proton ..... ....... +le 1.67 x 10-27 kg Elementary Charge ........... e = 1.60 x 10-19 C nano.... n. ......... .. 10-9 Coulomb's Law Constant .. k = 8.99 x 109 N.m2/C2 micro .... ! ........ 10-6 Neutron.......... 0 1.67 x 10 2kg Electron Volt ... 1 eV = 1.60 x 10-19 J milli........ m. ... .. 10-3 First-Generation Fermions Index of Refraction of Air. n = 1.00 centi..... C............. 10 2 Charge Mass Speed of Light in Vacuum. c = 3.00 x 10 m/s deci....... d...... 10 - 1 Electron ..... ~0.511 MeV/c2 Planck's Constant ......... h = 6.63 x 10 34 J.s deka ......... da...... 10' h = 4.14 x 10 eV.s 102 Positron ... ~0.511 MeV/c2 hecto ...... h. Atomic Mass Unit ...... ....... u = 1.66 x 10 2kg kilo ...... K. ..... 103 Electron neutrino, v.. 0