Thermal energy is to be generated in a 0.133 O resistor at the rate of 10.5 W by connecting the resistor to a battery whose emf is 1.5 V. (a) What potential difference must exist across the resistor? (b) What must be the internal resistance of the battery? (a) Number i 8.85 Units (b) Number i 0.11 Units

Thermal energy is to be generated in a 0.133 O resistor at the rate of 10.5 W by connecting the resistor to a battery whose emf is 1.5 V. (a) What potential difference must exist across the resistor? (b) What must be the internal resistance of the battery? (a) Number i 8.85 Units (b) Number i 0.11 Units

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter9: Current And Resistance

Section: Chapter Questions

Problem 42P: What current flows through a 2.54-cm-diameter rod of Pure silicon that is 20.0 cm long, when 1.00103...

See similar textbooks

Similar questions

Consider a power plant is located 60 km away from a residential area uses Q-gauge (A=42.40mm2) wire ofcopper to transmit power at a current of I = 100.00 A.How much more power is dissipated in the copper wires than it would be in superconducting wires?
Resistors are commonly rated at 18W,14W,12W ,1 W and 2 W for use in electrical circuits. If a current of1 = 2.00 A is accidentally passed through a R=1.00 resistor rated at 1 W, what would be the most probable outcome? Is there anything that can be done to prevent such an accident?
Digital thermometers often make use of thermistors, a type ofresistor with resistance that varies with temperature more thanstandard resistors. Find the temperature coefficient of resistivityfor a linear thermistor with resistances of 75.0 Ω at 0.00°Cand 275 Ω at 525°C.
) An electron beam consist of 1016 electrons passing through a given cross section n one minute. (a) Determine the current in amperes. (b) If the potential difference between the tip of the electron gun and the screen is 5000 V, determine the resistance of the path taken by the electron beam.
AR = 40 N resistor has a power rating of 10 W. This means that if the electrical power deliv- %3D ered to this resistor exceeds 10 J/s, the resistor will burn up and be destroyed. (a) Determine the maximum potential difference that can be applied across this resistor. (b) Determine the maximum current that can be safely sent through this resistor. (c) Such a resistor that burns up is known as a fuse. Any fuse always carries a rating label on it and electricians always know the rating of a fuse before using it. Determine the rating label on this fuse. A 9:19 AM P Type here to search 9396 93% 4/5/2021 ダー F10 *** Prise Insert Delete F3 FS F7 FO F11 F12 23 & Backspace 4 8 %3D E R T Y U PI D 11 F C B N A PgU- Alt Alt Ctrl Home V
Power Rating of a Resistor. The power rating of a resistor is the maximum power the resistor can safely dissipate without too great a rise in temperature and hence damage to the resistor. (a) If the power rating of a 15 k 2 resistor is 5.0 W, what is the maximum allowable potential difference across the terminals of the resistor? (b) A 9.0 k resistor is to be connected across a 120 V potential difference. What power rating is required? (c) A 100.0 and a 150.0 resistor, both rated at 2.00 W, are connected in series across a variable potential difference. What is the greatest this potential difference can be without overheating either resistor, and what is the rate of heat generated in each resistor under these conditions?
A 15.5 V battery is connected to a 102 Ωresistor.Neglecting the internal resistance of thebattery, calculate the power dissipated in theresistor.Answer in units of W.
A 120 V potential difference is applied to a space heater that dissipates 438 W during operation. (a) What is its resistance during operation? (b) At what rate do electrons flow through any cross section of the heater element? (a) Number Units (b) Number Units
A 60-W light bulb typically has a current of 0.50-A flowing through it. Calculate (a) the number of electrons passing a cross section of the bulb’s filament each second, (b) the number that pass the cross section in 1 h. (a) Calculate the current through a 2.5  flashlight filament when connected across two 1.5-V batteries (potential difference of 3.0 V). (b) Calculate the resistance of the heating elements in a toaster if 10-A current flows when connected across a 120-V potential difference.
What is the maximum power deliverable by a stack of 100 10YSZ cells to an optimum resistive load? Given each cell has open circuit voltage of 1.1V in series and the resistance is 17.78 ohms. The dimensions of the 10YSZ electrolyte are 0.1m x 0.1m x .0002m.
A block of carbon is 3.0cmlong and has a square cross- section whose sides are 0.50cmlong. A potential difference of 8.4Vis maintained across its length.(a) What is the resistance(R) of the block?(b) What is the current(I) in this resistor?
A heating element is made by maintaining a potential difference of 89.0 V across the length of a Nichrome wire that has a 4.96 x 10-6 m2 cross section. Nichrome has a resistivity of 5.00 x 10-7 2:m. (a) If the element dissipates 2880 W, what is its length? (b) If 102 V is used to obtain the same dissipation rate, what should the length be? (a) Number Units (b) Number Units