Download unit H physics II exam and more Exams Physics in PDF only on Docsity!
(H 1 ) Magnetic Forces and Fields PHY 202 Student Code: nature ISIIJ If the charge is 23 μC, the velocity is 1500 m/s, the strength of the magnetic field is 0.85 T, and the angle is 161 deg, then find the force (magnitude and direction) on the charge.
A. 0 .008295 N D. 0.009547 N B. 0.009613 N E. 0.008085 N C. 0.008052 N F. 0.008021 N /--/
- direction A. Into the paper B. Out of the paper /--/ IZOZN As shown, find the force (magnitude and direction) on the charge.
A. 0.04666 N D. 0.05774 N B. 0.04852 N E. 0.05351 N C. 0.04870 N F. 0.05812 N /--/
- direction A. Into the paper B. Out of the paper /--/ OUMSP For the current-carrying wire in the magnetic field as shown below, in what direction is the magnetic force on the wire?
A. Into the paper B. Out of the paper /--/ IZOZR A 0.15 m segment of wire lies along the y-axis and carries a current of 4.1 A in the negative y direction. A uniform magnetic field with strength 1.4 T is parallel to the positive x direction. What is the force (magnitude and direction) on the segment of wire due to the magnetic field?
- magnitude A. 0.7007 N D. 0.7704 N B. 0.8610 N E. 1.011 N C. 1.070 N F. 0.9276 N /--/
- direction A. Into the paper B. Out of the paper /--/
LQNYK The current of a long wire is directed into the page. Which of the following best represents a sampling of magnetic field vectors due to the current?
A. C. B. D. /--/
(H2) Induction and Inductance PHY 202 Student Code: nature OUMWP The magnetic flux through a loop is greatest when the magnetic field is _____________ to the plane of the loop.
A. parallel B. perpendicular /--/ JADVS A constant 0.350 T magnetic field is perpendicular to the plane of a loop with radius 1.2 cm. Find the flux through the loop.
A. 0.0001677 Wb D. 0.0001291 Wb B. 0.0001564 Wb E. 0.0001583 Wb C. 0.0001477 Wb F. 0.0001350 Wb /--/ ISIJN A constant 0.28 T magnetic field passes through a loop at an angle of 35° with respect to the normal of the area of the loop. If the radius of the loop is 0.025 m, then find the flux through the loop.
A. 0.0005251 Wb D. 0.0004504 Wb B. 0.0004462 Wb E. 0.0005114 Wb C. 0.0005202 Wb F. 0.0004965 Wb /--/ JADVY Suppose the flux through a loop changes uniformly from 12 Wb to 18 Wb in 6.50 s. What is the magnitude of the emf induced in the loop?
A. 1.114 V D. 0.7692 V B. 0.9231 V E. 0.9437 V C. 0.7869 V F. 1.063 V /--/
JADWB RL Series Circuit Suppose ℰ = 1 .3ˍVolts, 𝑅 = 16ˍΩ, and 𝐿 = 33ˍmH. Then find…
- the final current 𝐼m A. 0.08125ˍA D. 0.08066ˍA B. 0.1496ˍA E. 0.08115ˍA C. 0.08043ˍA F. 0.0759ˍA /--/
- the time constant 𝜏 A. 0.003527ˍs D. 0.001908ˍs B. 0.003481ˍs E. 0.002924ˍs C. 0.002063ˍs F. 0.003534ˍs /--/
- the current after 0.0058ˍs A. 0.1241ˍA D. 0.1124ˍA B. 0.05432ˍA E. 0.04411ˍA C. 0.07637ˍA F. 0.04518ˍA /--/
- the current after 0.27 time constants A. 0.03323ˍA D. 0.01825ˍA B. 0.01614ˍA E. 0 .03161ˍA C. 0.01923ˍA F. 0.02831ˍA /--/
- As a function of the time, the current in the circuit ________________. A. increases B. decreases /--/
QXUMN RL Series Circuit Suppose ℰ = 6.7ˍV, 𝑅 = 162ˍΩ, and 𝐿 = 97.2ˍmH. Then find…
- the final current 𝐼m A. 0.04318ˍA D. 0.04682ˍA B. 0.04136ˍA E. 0.04895ˍA C. 0.04524ˍA F. 0.05061ˍA /--/
- the time constant 𝜏 A. 0.0006185ˍs D. 0.0005524ˍs B. 0.0006ˍs E. 0.0005747ˍs C. 0.0005223ˍs F. 0.0005034ˍs /--/
- the current as a percentage of the maximum current after 0.000879ˍs A. 84.75ˍ% D. 90.69ˍ% B. 76.89ˍ% E. 81.08ˍ% C. 87.11ˍ% F. 94.6ˍ% /--/
IYYCI Consider a series circuit with the following elements: a 230 Ω resistor, a 40.0 μF capacitor, and a 80.0 mH inductor. A 70 Hz alternating current passes through each element.
- What is the capacitor’s reactance XC? A. 68.17 ohms D. 44.52 ohms B. 43.30 ohms E. 67.93 ohms C. 56.84 ohms F. 61.35 ohms /--/
- What is the inductor’s reactance XL? A. 37.32 ohms D. 27.00 ohms B. 38.23 ohms E. 28.55 ohms C. 35.19 ohms F. 28.09 ohms /--/
- What is the impedance Z for the circuit as a whole? A. 215.9 ohms D. 197.9 ohms B. 196.8 ohms E. 231.0 ohms C. 220.4 ohms F. 198.0 ohms /--/ PPWMU An RLC series circuit is plugged into a 120ˍV (rms), 60ˍHz wall outlet. The circuit elements are 230ˍΩ resistor, 19ˍmH inductor, and 12ˍμF capacitor. What is the rms current of the circuit?
- Current (rms) = A. 0.3684ˍA D. 0.402ˍA B. 0.4175ˍA E. 0.4397ˍA C. 0.3821ˍA F. 0.347ˍA /--/ PPWNJ An RLC series circuit has elements are 680ˍΩ resistor, 100ˍmH inductor, and 210ˍμF capacitor. What is the resonance frequency of the circuit?
- Current (rms) = A. 32.05ˍHz D. 34.73ˍHz B. 36.04ˍHz E. 28.98ˍHz C. 30.88ˍHz F. 33.65ˍHz /--/
PPWLA The power of the heating element in an electric toaster is 580ˍW when connected to a 120 volt outlet. Find the element’s resistance. (Note. The US standard of 120 volts is the rms voltage.)
- Resistance = A. 20.35ˍΩ D. 22.79ˍΩ B. 21.8ˍΩ E. 25.93ˍΩ C. 24.83ˍΩ F. 24.07ˍΩ /--/ PPWLT A transmission line has power (the rate at which it delivers energy to a town, for instance) 410ˍMW and delivers it at an rms voltage of 85ˍkV. What is the rms current in the transmission line?
- Current (rms) = A. 5541ˍA D. 4568ˍA B. 5369ˍA E. 4824ˍA C. 5172ˍA F. 4980ˍA /--/ IYYCJ A transformer has a primary coil with 800.0 turns and a secondary coil with 175.0 turns. If the voltage across the primary coil is 6000 V, what is the voltage output from the secondary coil?
A. 1313 V D. 1000 V B. 1123 V E. 1470 V C. 1319 V F. 1571 V /--/ PPWMG The transformer between a wall outlet and a cell phone has an output of 0.42ˍA at 4.7ˍV. What is the current at the 120ˍV wall outlet? (Note. All values are rms.)
- Current (rms) = A. 15.54ˍmA D. 16.45ˍmA B. 18.04ˍmA E. 14.09ˍmA C. 17.28ˍmA F. 14.72ˍmA /--/
OVLXW Find the electric field amplitude in an EM wave if the magnetic field amplitude is 2.5ˍmT.
A. 750ˍkN/C D. 4870ˍkN/C B. 1420ˍkN/C E. 1840ˍkN/C C. 3640ˍkN/C F. 4140ˍkN/C /--/ OVLZC An airplane can measure its altitude by reflecting EM waves off the ground. If a reflected pulse is received 51ˍμs after having been originally emitted by the airplane, then what is the airplane’s altitude?
A. 9820ˍm D. 74 30ˍm B. 15000ˍm E. 7650ˍm C. 11460ˍm F. 16050ˍm /--/ PPWVW Suppose in some different universe that the values of 𝜖 0 and 𝜇 0 are 0.0000624ˍC²/(N·m²) and 0.0107ˍT·m/A, respectively. What would be the speed of light in this universe?
- Speed of light in a different universe = A. 1007ˍm/s D. 1115ˍm/s B. 1224ˍm/s E. 947ˍm/s C. 1186ˍm/s F. 1048ˍm/s /--/ ISZOO An electromagnetic wave has frequency 5.5E+14ˍHz. What is its wavelength in nanometers? Is this wave within the spectrum of visible light?
- Wavelength A. 5455ˍnm D. 545.5ˍnm B. 54.55ˍnm E. 0.5455ˍnm C. 54550ˍnm F. 5.455ˍnm /--/
- Visible? A. Yes B. No /--/
PPWWP What is the intensity of an electromagnetic wave if its peak electric field is 90ˍN/C?
- Intensity = A. 9.88ˍW/m² D. 12.37ˍW/m² B. 11.37ˍW/m² E. 12.01ˍW/m² C. 10.75ˍW/m² F. 10.32ˍW/m² /--/
OUMSU For the current-carrying wire in the magnetic field as shown below, in what direction is the magnetic force on the wire?
A. Up B. Down C. Left D. Right /--/ ISIIO A 0.25 m segment of wire lies along the x-axis and carries a current of 4.7 A in the negative x direction. A uniform magnetic field with strength 1.8 T points in the positive y direction. What is the force (magnitude and direction) on the segment of wire due to the magnetic field?
- magnitude A. 1.650 N D. 2.182 N B. 2.015 N E. 2.115 N C. 2.198 N F. 2.104 N /--/
- direction A. Into the paper B. Out of the paper /--/
I
QDTLE In the diagram below (and with appropriate values), the electric current in a long, straight wire is directed out of the page. The resulting magnetic field is measured at two locations. Compare the strengths of the magnetic fields at the two locations (as a ratio 𝐵 1 ⁄𝐵^2 ). 𝐼 = 6ˍA, 𝑟 1 = 6.78ˍmm, 𝑟 2 = 15.5ˍmm
- 𝐵 1 ⁄𝐵 2 A. 2.182 D. 2. B. 2.362 E. 2. C. 2.472 F. 1. /--/
QEUOK A rectangular loop (in the page) is placed in a magnetic field (into the page), as shown below. If 𝑎 = 3.8ˍcm, 𝑏 = 5ˍcm, and 𝐵 = 0.2ˍT (not labeled in diagram), then find the flux through the loop.
A. 0 .4139ˍmT D. 0.3995ˍmT B. 0.38ˍmT E. 0.4354ˍmT C. 0.4567ˍmT F. 0.4693ˍmT /--/ QEQHI A constant 0.25ˍT magnetic field passes through a loop at an angle of 36.9° with respect to the normal of the area of the loop. If the radius of the loop is 15ˍmm, then find the flux through the loop.
A. 0.0001345ˍWb D. 0.0001644ˍWb B. 0.0001413ˍWb E. 0.0001463ˍWb C. 0.00016ˍWb F. 0.0001522ˍWb /--/ QERMA Calculate the inductance of a solenoid with 218ˍturns if the length of the solenoid is 17ˍcm and its radius is 2.1ˍcm.
A. 0.0004585ˍH D. 0.0004867ˍH B. 0.0005729ˍH E. 0.0005048ˍH C. 0.0005326ˍH F. 0.0005517ˍH /--/
QEUPU What is the potential difference across a 19.8ˍmH inductor if the current through the inductor drops from 477ˍmA to 343ˍmA in 11.5ˍμs?
A. 221.1ˍV D. 201.5ˍV B. 239.3ˍV E. 253ˍV C. 214.2ˍV F. 230.7ˍV /--/ QEQIF RL Series Circuit Suppose ℰ = 4.6ˍV, 𝑅 = 110ˍΩ, and 𝐿 = 3 9ˍmH. Then find the current after 0.00022ˍs.
A. 0.01933ˍA D. 0.01993ˍA B. 0.01698ˍA E. 0.01756ˍA C. 0.01853ˍA F. 0 .02097ˍA /--/ QERJQ RL Series Circuit Suppose ℰ = 4ˍV, 𝑅 = 11ˍΩ, and 𝐿 = 3.3ˍH. After 0.4 time constants, the current is what percent of its maximum value?
A. 34.28% D. 32.97% B. 27.33% E. 30.01% C. 28.32% F. 31.41% /--/
(H3) AC Circuits
KQLGF In a loop of wire, an electric current can be induced by _____________________________.
A. spinning the loop around its natural axis B. saying the magical incantation C. varying the magnetic flux through the loop D. application of Gauss’s Law /--/
