At 20°C, the carbon resistor in an electric circuit connected to a 6.5-V battery has a resistance of 1.9 x 102 . What is the current in the circuit when the temperature of the carbon rises to 77°C?7 mA Need Help? Read It
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- Q5: Derive the expression for power P = VI in an electrical circuit. Q6: What is the resistance of an electric arc lamp, if the lamp uses 20A20A when connected to a 220 volt? Q7: A 162 resistor is connected to a 48v battery. What is the charge flow through it in one minute? Q8: A wire having an area of cross section = 6mm? and another wire having an area of cross section 10mm2, have the same length and are made up of the same material. Which wire has more resistance? Q9: In two minutes, 120C of charge flow through a conductor. What is the current flowing through it and the voltage across the terminals if the resistance of the conductor is equal to 22? Q10. 100 cm length of wire that is 1.5mm2 in cross section has a measured resistance of 12. Calculate the resistivity of the used material. Q11. Some homes use solid wire having a cross-sectional area of 4mm2 to provide electrical distribution to outlets and light sockets. Determine the resistance of 24 meters of this solid wire.…s/Interface/acellus_engine.html?ClassID=1038486622 se Mail - kla. P PicsArt / Editor Dayforce Unit 1 Exam Status Exam Which is true of the material that makes up high resistance wires? A. The wire is made using more copper than other wires. B. The wire is made out of a material that is a very good conductor. C. The wire is made out of a material that is not a good conductor. Copyrightaoog-2oa Acelus Corporahon. All Rights ReservedSolve the following: 1. A certain light bulb has a resistance of 150 when lighted. How much current will flow through it when connected across a 220 V, its normal operating voltage? Draw the circuit schematic diagram>Fin 2. Find the potential difference (Emf) in a certain electric circuit with current flowing at 18 ampere and a floor Polisher connected with resistance of 12 Q? 3. A 12 volts battery operates a 15 ohms digital scale for 5.2 minutes. a) Find the current flowing b) the charges Transferred with the given time. 4. What is the resistance of a conductor at 50° C if its resistance at 0°C is 1 ohm and the temperature coefficient of resistance of 9.8 x 10-³/°C 5. A silver wire has a resistance of 2.3 2 at 0°C and a temperature coefficient of resistance of 3.75 x 10-³/°C. What is final temperature when the final resistance is 3.8 ohms. ? 6. Complete the table : V, Volts 8 volts 20 volts 10 Volts 36 volts I, Ampere 2.8 mA 40A 130mA R, ohms 156 Ω 25 ΚΩ 450 ΚΩ
- 5. A 250-volt electrical heater is used to warm 3Li/hr of water from 19°C to 98°C. Assume heat conversion loss of 25% of the total heat supplied, how much current in amperes must be supplied to this heater. Derive with the formula below, show the cancellation, explain the step by step and DRAW a free body diagram/figure. refer with this: PE1 + KE1 + U1 + WF1 + Q1 + W1 = PE2 + KE2 + U2 + WF2 + Q2 + W2 + E losses.A tooster has a heating element of Nichrome. It is connected to a source of 240 V at Temperature 20 °C, and the current was 2 A The current begins to decrease a the heating element warms up to 1.5 A. Find the final temperature (in °C) of the element? ɑnichrome = 0.4×10-3 °C-1Solve the following: 1. A certain light bulb has a resistance of 150 when lighted. How much current will flow through it when connected across a 220 V, its normal operating voltage? Draw the circuit schematic diagram>Fin 2. Find the potential difference (Emf) in a certain electric circuit with current flowing at 18 ampere and a floor Polisher connected with resistance of 12 ? 3. A 12 volts battery operates a 15 ohms digital scale for 5.2 minutes. a) Find the current flowing b) the charges Transferred with the given time. 4. What is the resistance of a conductor at 50° C if its resistance at 0°C is 1 ohm and the temperature coefficient of resistance of 9.8 x 10-³/°C 5. A silver wire has a resistance of 2.3 at 0°C and a temperature coefficient of resistance of 3.75 x 10-³/°C. What is final temperature when the final resistance is 3.8 ohms. ? 6. Complete the table: Electric Circuit and Ohm's Law V, Volts 8 volts 20 volts 10 Volts 36 volts I, Ampere 2.8 mA 40A 130mA R, ohms 156 02 25 ΚΩ…
- 7. The resistivity of seawater is p= 25 2.cm and the number of charges per volume is 6 × 1020 ions/ cm3 each with charge q 1.6 x 10-19 C. If we fill a tube 2 m long with seawater and connect a 12-volt battery, what is the resulting average drift velocity of the ions (Answer in cm/s)?2. A nichrome wire of length 1.5 m is used as conductor. The cross-sectional area of the wire is 0.75 m?. Calculate for the resistance of the nichrome wire. (Resistivity of nichrome is 1.00 x 106 2) 3. A 5.0 A current is drawn to the circuit with resistor 5.0 -N. What is the voltage of the source? In a physics laboraton oxporinment whore a4. The resistance of a resistor changes with temperature; the equation is given as: R= a T^2 + b T+C. The resistance was measured at three different temperatures. (20 C, 521 ohms), (60 C, 1329 ohms), (100 C, 2925 ohms). What are the values of a, b, and c for this resistor? ( hint: create three equations, solve for the unknowns aband c using simultaneous equations.
- ohm's law states that the current flowing in a fixed resistor is directly proportional to the applied voltage. when 30 volts is applied accross a resistor, the current flowing through the resistor is 2.40x10^-3 amperes. a. Determine the constant of proportionality between voltage and current. b. Determine the current when applied voltage is 52Volts. c. Determine the voltage when the current is 3.60x10^-3 amperes.tus or W tus (15%) Problem 1: Consider a wire made of copper with conductivity 6.0 x 107 02¹m¹, which has a circular cross-section of radius 0.17 mm. In a particular circuit, this wire carries a current of 2.5 A. Fequiere, Vanessa-vanessa fequiere@uconn.edu Completed Completed @theexpectta.com-Arackmg 10:2ZEN BALIMISTADA so may result in terminaisou your Expen TNI A 50% Part (a) What is the electric field, in volts per meter, inside this wire? E=1 sin() cotan() atan() cosh() cos() asin() acotan() tanh() Degrees Submit tan() acos() sinh() cotanh() Radians Hint E ( + VO Feedback 7 8 9 4 5 6 1 2 3 131 0 I give up! Feedback: 0% deduction per feedback. olanens sharing website is strictly forbidden. Doing Grade Summary Deductions Potential 0% 100% Submissions Attempts remaining: S (0% per attempt) detailed view Hints: 2% deduction per hint. Hints remaining: 1 50% Part (b) If we replace this wire with a gold one of the same size, with conductivity 4.1 x 1072 m, what will the electric field in…1. A voltmeter has an internal resistance of 500 kilo-ohm. Determine the voltage drop across the voltmeter when a 10 ampere current passes through it. 2. What is the resistance of copper wire that has a length of 1 kilometer and a diameter of 0.505 mm? 3. An aluminum wire has a resistance of 80 ohms at 30 degree Celsius. Determine its resistance when its temperature is lowered to –10°C.