Question

of an electromagnetic wave propagating in a vacuum is 65 x 10 Hz. See the table for problem 1 1) To what part of the electromagnetic spectrum does this wave a) blue light 2) The electromag a)perpendicular to b) parallel to the the magnetic field b) green light netic field of the electromagnetic wave is d) violet light c) antiparallel to the d) paralel to the wave velocity magnetic field magnetic field The speed of light in a medium is 1.84 × 10a m/s. 3) What is the index of refraction of this medium? 2. b) 2.43 c) 1.92 What is the critical angle for a light ray coming from this medium into the air? d) 24.3 4) b) 40.5 a) 31.4° 3. Two charges, Q.--0.3 pC and Q2 = 0.7 pC move in a uniform magnetic field. The force, F,, on the charge Q, and the velocity vectors of the two charges are shown in the figure for problem 3. qure for Pr What is the direction of the magnetic field? a) out of the page What is the direction of the force on the charge Q2? - 5) b) downward c) into the page d) upward 6) a) upward b) towards the left c) towards the right DJownward 4. Three charges Q- 3C, 2C and Q4 C are shown in the figure for problem 4. Which quadrant is the net force on the charge Qs pointing into? b) quadrant 8) Which quadrant is the electric field due to Q and Qs at the origin pointing into? b) quadrant 7) c) quadrant !ll d) quadrant IV c) quadrant /I d) quadrant IV An object of height of 0.4 m is placed 0.1 m in front of a lens. The power of the lens is 5 D 5. blem 7 9) What is the distance from the lens to the image? a)-0.1 m 10) What is the height of the image? a) 0.2 m b) 0.1 m s c) 0.3 m d)-0.2 m b) 0.1 m rI 11) The image is a)virtual and upright c) 0.8 m d) 1.2 m b) real and upright c) real and inverted d) virtual and inverted 6. The charge on each plate of a parallel-plate capacitor is 20 uC. The capacitance of the capacitor is 2SuF. The distance between the plates is 0.01 m. 1 μC-10-. C. 1 μF-10-6 F. 12) What is the magnitude of the electric field between the plates of the capacitor? a) 80 V/m b) 20 V/m d) 40 V/m 13) If the area of each plate remains the same but the distance between the plates increases by a factor of nine, then a) the capacitance b) the capacitance c) the capacitance decreases by a factor increases by a factor increases by a factor of decreases by a factor of of three d) the capacitance of nine 14) What is the amount of charge passing through one end of the resistor per secona? a)02 С c) 5C d 0.1C 15) lfrie length of the resistor decreases by a factor of two, the armourvt of charge passing บาย resistor per second a)increases by a b) decreases by a factor c) decreases by a factor dinoeam by stator factor of two 16) Find the power dissipated in the resistor a)50W of four of two two b) 1 W d) 20 w 8. A DC circuit is shown on the figure for problem &.R-30, R-1,1-3A,,-15 17) What is the current through R? a) 3 A 18) What is E,? a) 3 v b) 1 A c) 5 A d) 2 A b) 5 V c) 4 V d) 2 V 9. A current carmrying wire is placed in the uniform magnetic field as shown in the figure for problem 9 The magnetic force on the wire is pointing to the let 19) The magnetic field is pointing a) out of the pageb)to the right 20) If the current in the wire increases by a factor of two, the force a) increases by a factor of two c) into the page d) to the left b) decreases by a factor of two c) decreases by ad)) increases by a factor factor of four of four 10. A loop of wire shown on the figure for problem 10 is placed in a uniform magnetic field directed into the page. The area of the loop increases by a factor of three during a time interval of one second. 21) The magnetic flux through the loop a) increases by a factor b) increases by a of three c) decreases by a factor of three d) decreases by a factor of nine factor of nine 22) The direction of the current induced in the loop a) is clockwise b) the current is zero c) is counterolockwise d) not enough information to make the conclusion 11. An AC circuit consisting of a resistor and an inductor connected in series is shown on the figure for problem 11. The rms current is 4 A. The resistance of the resistor is 3 n and the inductance of the inductor is 0.03 H. The impedance of the circuit is 5 23) What is the frequency of the alternating current? a) 127 Hz 24) What is the rms voltage? a) 10 V 25) What is the average power dissipated in the circuit? a)48w d) 21 Hz c) 64 Hz b) 30 V d) 15 V C) 20 V b) 27 W c)108 W d) 12 W

Answer 1

for cilca anle C

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