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- Activity #3. Quantitative Problem Direction: Solve the problem as directed. Show your solution and write your answers on the box. (1) A silver wire 1.00 mm in diameter transfers a charge of 65.0 C in 1 hr. 15.0 min. Silver contains 5.0 x 1028 electrons per cubic meter. What is the current in the wire? What is the magnitude of the drift velocity of the electrons in the wire? CONCEPTSActivity 2 - Wire or Why? Describe the following pictures showing how the wire conduct current was affected by its conductivity or resistivity. Write higher (conductivity, resistivity) or lower (conductivity, resistivity). !: Conductors =_ More free electrons in a wire = Nichrome wire =. : Copper wire = : Increasing Temperature of a wireUsing hand-drawn schematic diagrams, show curves that illustrate the temperature dependence of the electrical resistivity for the following types of materials: metals, semiconductors, and superconductors. Carefully diagram each curve, and labelling the plot axes.
- 1. Does the resistance of all substances increase with temperature? Explain. 2. What is the temperature coefficient of resistance, and what are its units? 3. Are the a of a metal conductor and the B of a thermistor the same? Explain. 4. What the circuit conditions when Wheatstone bridge is are a "balanced"? 5. Assuming that B remained constant, what would be the resistance of the thermistor in the experiment as the temperature approached absolute zero? 6. What characteristics of the thermistor make it flexible a temperature transducer?Hi I'm given the diameter of the sphere is 25cm. An electric pen brought near this sphere causes a voltage of 5000 V. The distance between the sphere and the pen is 14cm. The pen itself is measured at 25cm. they want to know what is the charge on the sphere? Please break it down so I can understand. The last answer had the wrong diameter calculated into the problem and was missing what formulas they used for each problem and how they solved it in steps.What is the difference between conventional current and electron current? What do they have in common? Why is the drift velocity of electrons in a conductor so much slower than the actual speed the charges are moving? Historically, why did scientists refer to sources of potential difference as emf ( aka electromotive force)? Is this label in any way misleading? Explain.
- Reclung.c A on ri gle Figure 1 2. The circuit shown above is constructed with two 6.0 V batteries and three resistors with the values shown. The currents 1₁, 12, and 13 in each branch of the circuit are indicated. 2 GEOMETRY AND TRIGONOMETRY Circle A = ²² C = 2πr Cy.inder bh - re Rectangular Solid Vlh Sphere 1. Using Kirchhoff's rules, write, but DO NOT SOLVE, equations that can be used to solve for the current in each resistor. ii. Calculate the current in the 200 9 resistor. iii. Calculate the power dissipated by the 200 2 resistor. V = ar²l S.. Figure 2 The two 6.0 V batteries are replaced with a battery with voltage & and a resistor of resistance 50 2, as shown above. The voltmeter V shows that the voltage across the 200 £2 resistor is 4.4 V. (b) Calculate the current through the 50 2 resistor. (c) Calculate the voltage & of the battery. V=² S = 4; 7² Rig Triangle 2 +6² = c² sin = COS== tan 8 = OJA b C 2m. a b 6.0 V 7,4 & A - area C=circumference h-hei £= le L W = IUL r=fuu.0…5 part A: If u(C) = 0.2C. What in the uncertainty of a 500 mF capacitor in mF? 5 Part B: If C = 500 mF and R = 8000 W , and V = 5 V. What is the voltage across the resistor in an RC circuit if it started out fully charged and the time since we started charging 6 seconds ago?sq 4. Maximum surface resistance. Consider a square sheet of side L, thickness d, and electrical resistivity p. The resistance measured between opposite edges of the sheet is called the surface resistance: R = pL/ Ld = p/d, which is independent of the area of the sheet. (R is called the resistance per square and is expected in ohms per square, because p/d has the dimensions of ohms.) If we express p by p=m/ne²t, then Rq=m/ndet. Suppose now that the minimum value of the collision time is determined by scattering from surfaces of the sheet, so that Td/v, where v is the Fermi velocity. Thus the maximum surface resistivity is Rmvp/nd²e². Show for a monatomic metal sheet one atom thickness that sq Rħ/e² = 4.1k, where lkn is 10³ ohms. sq
- Activity #3. Quantitative Problem Direction: Solve the problem as directed. Show your solution and write your answers on the box. (1) A silver wire 1.00 mm in diameter transfers a charge of 65.0 C in 1 hr. 15.0 min. Silver contains 5.0 x 1028 electrons per cubic meter. What is the current in the wire? What is the magnitude of the drift velocity of the electrons in the wire?Solve the following Physics problem. Show your solutions. Round off your final answer in a whole number. An electric flat iron draws a current of 15 A when connected to a 110 V line. (A.) Assuming that the heating element of the flat iron obeys Ohm’s Law, what is its resistance? (B.) What is the resistivity of the heating element if it is a wire that is 2.5 cm long with cross-sectional area of 2x10-4 cm long.Solve the following problems. identify the given, the unknown, give the formula to be used, show the solution, and express the final answer into 2 decimal places. You can use a separate sheet of paper in solving the problem. 1. Find the current along a circuit if the voltage is 110 V with a resistance of 22 Ohms. and Given. Unknown: and Unknown: 3. Calculate for the voltage supplied to a load if the current is 2.5 A and the resistance is 10.80 Ohms. and Given: Unknown: Solution: Performance Task Formula: Solution: Final Answer: 2. What is the resistance of a bulb with a current of 0.72 A that is connected to a 110 V supply. Given: Formula: Solution: Final Answer: Formula: Final Answer: