*39 A 1250 W radiant heater is constructed to operate at 115 V. (a) What is the current in the heater when the unit is operating? (b) What is the resistance of the heating coil? (c) How much thermal energy is produced in 1.0 h? sSM ILW
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- The severity of a shock depends on die magnitude of the current through your body. Would you prefer to be in series or in parallel with a resistance, such as the heating element of a toaster, if you were shocked by it? Explain.When a straight wire is heated, its resistance changes according to the equation R = R0 [1 + (T T0)] (Eq. 17.7), where is the temperature coefficient of resistivity. (a) Show that a more precise result, which includes the length and area of a wire change when it is heated, is R=R0[1+(TT0)][1+(TT0)][1+2(TT0)] where is the coefficient of linear expansion. (See Topic 10.) (b) Compare the two results for a 2.00-m-long copper wire of radius 0.100 mm, starting at 20.0C and heated to 100.0C.When a straight wire is heated, its resistance changes according to the equation R = R0 [1 + (T T0)] (Eq. 17.7), where is the temperature coefficient of resistivity. (a) Show that a more precise result, which includes the length and area of a wire change when it is heated, is R=R0[1+(TT0)][1+(TT0)][1+2(TT0)] where is the coefficient of linear expansion. (See Topic 10.) (b) Compare the two results for a 2.00-m-long copper wire of radius 0.100 mm, starting at 20.0C and heated to 100.0C.
- Coils are often used in electrical and electronic circuits. Consider a coil which is formed by winding 1000 turns of insulated 20-gauge copper wire (area 0.52 mm2 ) in a single layer on a cylindrical non-conducting core of radius 2.0 mm. What is the resistance of the coil? Neglect the thickness of the insulation.Residential building codes typically require the use of 12-gauge copper wire (diameter 0.205 cm) for wiring receptacles. Such circuits carry currents as large as 20.0 A. If a wire of smaller diameter (with a higher gauge number) carried that much current, the wire could rise to a high temperature and cause a fire. (a) Calculate the rate at which internal energy is produced in 1.00 m of 12-gauge copper wire carrying 20.0 A. (b) Repeat the calculation for a 12-gauge aluminum wire. (c) Explain whether a 12-gauge aluminum wire would be as safe as a copper wire.Residential building codes typically require the use of 12-gauge copper wire (diameter 0.205 cm) for wiring receptacles. Such circuits carry currents as large as 20.0 A. If a wire of smaller diameter (with a higher gauge number) carried that much current, the wire could rise to a high temperature and cause a fire. (a) Calculate the rate at which internal energy is produced in 1.00 m of 12-gauge copper wire carrying 20.0 A. (b) Repeat the calculation for a 12-gauge aluminum wire. (c) Explain whether a 12-gauge aluminum wire would be as safe as a copper wire.
- • M A & y O 0 1:A اختبار المد فيزياء عام . . Imssb1.mutah.edu.jo Marked out of 6 P Flag question Given that the delivered power to a resistor is equal to P when the current flowing in the resistor is Io. If the current increased to 9.4 lo, the delivered power to the resistor will be: Select one: A. 176.7 P B. 0.1 P C. 18.8 P D. 9.4 P E. 88.4 P Clear my choice Previous page Next page العربية الإنجليزية G IIWhy is it advisable to allow electric line to sag between poles? Is it possible for a ship to use the internal energy of seawater to operate itsengine? Explain.V1 20V R1 100kOhm C1 50μF In the given circuit, calculate the time after connection when the resistor voltage is 18. Final answer should be in four (4) decimal places. • For the final answer, express the unit in symbols. For example: 。 5.00 Kelvin should be expressed as 5.00 K • DO NOT answer in exponential form. Express your answer in seconds (s).
- When the ammeter is connected to the electrical circuit, the total current is O • equal to the current passing through the ammeter, because the ammeter has a large resistance. O is greater than the current passing through the ammeter because the ammeter has a small resistance O is equal to the current passing through the ammeter because the ammeter has a small .resistance-25.25 • (a) What is the resistance of a Nichrome wire at 0.0°C if its resistance is 100.00 N at 11.5°C? (b) What is the resistance of a carbon rod at 25.8°C if its resistance is 0.0160 N at 0.0°C?A fish-tank heater is rated at 85 W when connected to 120 V. The heating element is a coil of Nichrome wire. When uncoiled, the wire has a total length of 3.0 m. What is the diameter of the wire? Express your answer to two significant figures and include the appropriate units. HA d 3D Value Units Submit Request Answer Next» « Previous AN 18:58 W 03/04/2022 hp 2000 hp F12 f11 16 f10 +1 delete f5 (7 f8 f9 insert prt sc & 8. 9. backspace home E