Physics, 19.03.2020 22:30 travashouston4873

When you connect an unknown resistor across the terminals of a 1.50 V D-cell battery having negligible internal resistance, you measure a current of 2.05 mA flowing through it. a. What is the resistance of this resistor? 731.7 Correct: Your answer is correct. Ω b. If you now place the resistor across the terminals of a 9.0V battery having no internal resistance, how much power dissipates across the resistor? .1107 Correct: Your answer is correct. W You now put the resistor across the terminals of a power supply with an unknown emf an internal resistance of 35 Ω and measure a current of 0.0036 A flowing through the resistor. c. What is the emf of the power supply? 2.76 Correct: Your answer is correct. V d. If the resistor is connected to the power supply for 18.0 minutes, how many kilowatt-hour is used by the resistor?

Answers: 3

Show answers

Another question on Physics

Physics, 21.06.2019 20:30

Aball is thrown straight up into the air with a speed of 21 m/s. if the ball has a mass of 0.1 kg, how high does the ball go? acceleration due to gravity is g = 9.8 m/s^2. a. 22.5 m b. 20.0 m c. 25.0 m d. 17.5 m

Answers: 2

Answer

Physics, 22.06.2019 02:20

22. the effect of threshold braking is to a cause skids. b. lock wheels. c. prevent locking of wheels. d. increase stopping distance.

Answers: 2

Answer

Physics, 22.06.2019 21:10

Aspecified volume of space contains an electric field for which the magnitude is given by e=e0cos(ωt). suppose that e0 = 20 v/m and ω = 1.0 × 107 s−1. part a what is the maximum displacement current through a 0.80 m2 cross-sectional area of this volume? express your answer with the appropriate units. idisp,max i d i s p , m a x = nothing nothing request answer part b how would this area have to be oriented relative to the electric field to get this maximum displacement current?

Answers: 2

Answer

Physics, 22.06.2019 21:40

Ahair dryer is basically a duct in which a few layers of electric resistors are placed. a small fan pulls the air in and forces it through the resistors where it is heated. air enters a 1200 w hair dryer at 100 kpa and 22°c and leaves at 47°c. the cross-sectional area of the hair dryer at the exit is 60 cm2. neglecting the power consumed by the fan and the heat losses through the walls of the hair dryer, determine (a) the volume flow rate of air at the inlet and (b) the velocity of the air at the exit.

Answers: 1

Answer

You know the right answer?

When you connect an unknown resistor across the terminals of a 1.50 V D-cell battery having negligib...

Questions