Current has a heating effect due to the law of conservation of energy. A sealed container containing a liquid is connected across a supply having a voltage V. If the current / is flowing through the connection, which of the following equations can solve the time needed to change the liquid to steam? Let m be the mass of the liquid and Ly be the latent heat of vaporization of the liquid. mLv t = VI t = VImLy VI t = mLv O The answer cannot be found on the other choices.

Current has a heating effect due to the law of conservation of energy. A sealed container containing a liquid is connected across a supply having a voltage V. If the current / is flowing through the connection, which of the following equations can solve the time needed to change the liquid to steam? Let m be the mass of the liquid and Ly be the latent heat of vaporization of the liquid. mLv t = VI t = VImLy VI t = mLv O The answer cannot be found on the other choices.

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter28: Current And Resistance

Section: Chapter Questions

Problem 69PQ

See similar textbooks

Similar questions

A conductor carries a current that is decreasing exponentially with time. The current is modeled as I=I0et/ , where I0= 3.00 A is the current at timet = 0.00 s and =0.50 s is the time constant. How much charge flows through the conductor between t = 0.00 s and =3 ?
A pipe of cross-sectional area 0.4 m2 carries molten gold flowing at a speed of 2.5 m/s. What is the current through the pipe?
The inner vessel of an electrocalorimeter is made of copper and has a mass of 50grams. It contains 200 grams of water having an initial temperature of 20°C. Theelectrocalorimeter is connected to 6 volts and a constant current of 2.5 ampsflows. What will be the temperature of the water inside the inner vessel after 1hour?
Which are true? a) Current is the total amount of charge that passes through a conductor's full cross section at any point per unit time. b) By convention, the direction of a current is taken to be the direction of flow for negative charges. c) When an electric field is applied to a conductor, the free electrons move only in the direction opposite the applied electric field. d) In order to maintain a steady flow of current in a conductor, a steady force must be maintained on the mobile charges. e) In a circuit, current is delivered by the positive terminal of a battery, and it is used up by the time it returns to the negative terminal of the battery.
If the current flowing through a circuit is 0.6 A for 6 mins, the amount of electric charge flowing through it is ....... A) 360C B) 216 C C) 60 C D) 36 C
With a potential difference of 4V across a wire of length 5m and cross section area 1x10-6 m2 there is found to be a current of 12A flowing in the wire. What is the conductivity of the wire? Select one: a. 1.5×107 Siemens b. 9.6×106 Siemens c. 6×10-7 Siemens d. 1.66×107 Siemens
A tungsten wire is used to determine the melting point of indium. The resistance of the tungsten wire is 2.472 at 20.0°C and increases to 4.409 as the indium starts to melt. αtungsten = 4.50 x 10−3 (°C)−1. What is the melting temperature of indium in °C?
A wire of copper having length I and area of cross-section A is taken and a current / is flown through it. The power dissipated in the wire is P. If we take an aluminium wire having same dimensions and pass the same current through it, the power dissipated will be: A) P B) < P C) > P D) 2P
Give me additional examples of values with infinite significant figures. According to our handouts, here is one of the examples: 3000 chocolate Bars which are considered countable numbers. Moreover, the final zeroes in a whole number are significant IF the unit of quantity is measurable like mass, temperature, length, current etc. Therefore, even the trailing numbers are counted as significant. Example: 40 kg (2 sig figs) & 1900 mm (4 sig figs). Give me more examples as well. Thank you!
An electric appliance with a current of I and a resistance of R converts energy to other forms at a rate of P when connected to a 120-Volt outlet. What would be the new power rating (in terms of P) if ... a. ... the current is doubled (and the same 120-Volt outlet is used)? b. ... the current is halved (and the same 120-Volt outlet is used)? c. ... the resistance is doubled (and the same 120-Volt outlet is used)? d. ... the resistance is halved (and the same 120-Volt outlet is used)? e. ... the current is tripled (and the same 120-Volt outlet is used)? f. ... the resistance is tripled (and the same 120-Volt outlet is used)? g. ... the same appliance is powered by a 12-Volt supply? h. ... the same appliance is powered by a 240-Volt supply?
At 20°C, the carbon resistor in an electric circuit connected to a 5.0-V battery has a resistance of 2.0 X 102 ?. What is the current in the circuit when the temperature of the carbon rises to 80°C? The temperature coefficient of resistivity for carbon is -0.5 X 10-3 ℃-1.
By measuring the currents and times and then draw the current vs time graph using the measurementat the lab for ε =8 V, R=1M Ω and C=1μF. What is the current at t=2.5 s? f values obtained after the experiment:I0=8μAApproximate time until current becomes zero= 5.7 s