Suppose a motor connected to 117 V source draws 20.2 A when it first starts. (a) What is its resistance? (b) What current does it draw at its normal operating speed when it develops a 100 V back emf? c) The motor in a toy car operates on 6.20 V, developing a 3.00 V back emf at normal speed. If it draws 2.80 A at normal speed, what current does it draw when starting? A

Suppose a motor connected to 117 V source draws 20.2 A when it first starts. (a) What is its resistance? (b) What current does it draw at its normal operating speed when it develops a 100 V back emf? c) The motor in a toy car operates on 6.20 V, developing a 3.00 V back emf at normal speed. If it draws 2.80 A at normal speed, what current does it draw when starting? A

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

Please Help ASAP!!!
In the bedroom of your house you would like to run a 360 W toward, a 30W alarm clock, a 720 W tanning bed, and three 60 W lights. Assuming your house is wired for 120 Volts, how much current will be pulled by these electrical devices? Amps
Most household power in North America is 120? alternating current (VAC). However, some high-power appliances such as electric ranges and clothes dryers typically require a special 220?circuit. In this problem, you will calculate the energy, power, and current required by a dryer. You will also compare different methods of storing the energy required to run this appliance in a typical drying cycle. Consider a dryer that operates on 220?electricity, and it consumes an average power of 3000?. For this homework, the “Alternating Current” part of the story is irrelevant, so please use our ordinary DC equations (Perhaps this dryer has been specially made for physics experiments so it has a second input that allows it to operate on DC voltage as well!) A cubic meter of “natural gas” (mostly methane) at atmospheric pressure contains about40?? of usable energy. How much natural gas (in m3) would it take to power the dryer for 30minutes? Do some googling, and make an estimate (that means getting…
PART (1) Assume capacitor is fully charged when switch is at position 'a' for about 10 minutes. The switch is changed to position 'b' at t= 0. What is the current in the circuit immediately after the switch is closed? Assume after some time, the current in the circuit is 80.0 mA when the switch is at position 'b'. Can you find, what will be that time? 9.0 V 부 Paragraph a itur b 1.0 με PART (II) Assume a magnetic field of 5.2 T present inside the cyclotron. An electron enters the cyclotron with speed of 2.0 x 107 m/s. What is the radius of the electron's orbit just before they exit from the cyclotron. BI U A/ 10 Ω E✓ E GO + v
In the R-L circuit shown in Fig. when switch S1 is closed, the potential vac changes suddenly and discontinuously, but the current does not. Explain why the voltage can change suddenly but the current can’t.
Suppose a motor connected to a 132 V source draws 18.8 A when it first starts. (a) What is its resistance? Ω (b) What current does it draw at its normal operating speed when it develops a 100 V back emf? A
Answer all parts When the switch is closed:a) How much current flows through the 6V battery? b) How much current flows through the 9V battery? When the switch is open:c) How much current flows through the 6V battery? d) How much current flows through the 9V battery?
R5
Consider the circuit shown in the figure, with =36.0 V,R, =50.02,R=1502 and L= 4.00 H. (a) Switch S, is closed. Just after S. is closed, what are the current i, through R, and the potential differences V and Va ? AC (b) After S. has been closed a long time so that the current has reached its final, steady value, what are i, . VAc and Ve ? (c) Find the expressions for i, , Vac and Ve as functions of time since S, was closed. Do your results agree with what you get in (a) and (b) ? Graph i, . Vsc and Ve as a function oftime. Ro L A
Find the value of the unknown emf shown in the figure, if the current I=1.1 A. 5.0 2 10 2 15 V= 4.0 2 15 V
The leads of an alternate current generator with peak voltage AVmax = 100.0V are placed across a 10.02 resistor. What is the average power dissipated by the resistor? 2.00 kW 0.150 kW 0.0500 kW 0.100 kW 1.00 kW 0.500 kW
What is the maximum power in W that can be generated from an 18 V emf using any combination of a 6.0 Q resistor, and 9.0 Q resistor?