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)...
Related questions
Question
A 12V battery is connected to a capacitor, resulting in 54.0 C of charge stored on the capacitor. How much energy is stored in the capacitor?
An electric heater carries a current of 13.5A when operating at a voltage of 120V. What is the resistance of the heater?
Transcribed Image Text:Many computer keyboard buttons are constructed of capacitors as shown in Figure. When a key
is pushed down, the soft insulator between the movable plate and the fixed plate is compressed.
When the key is pressed, what happens to the capacitance?
B
Key-
Movable plate-
Insulator
Fixed plate
One type of computer keyboard
button.
a. It increases
b. It idecreases
It changes in a way you cannot determine because the electric circuit connected to the
keyboard button may cause a change in DV
C.
d. Nothing happened
Transcribed Image Text:QUESTION 7
A 12V battery is connected to a capacitor, resulting in 54.0 µ C of charge stored on the
capacitor. How much energy is stored in the capacitor?
a. 32.4x10-4J
а.
O b. 324J
O c. 0.324mJ
O d. 3.24mJ
QUESTION 8
An electric heater carries a current of 13.5A when operating at a voltage of 120V. What is the
resistance of the heater?
O a. 0.1125 Ohm
O b. 4.5 Ohm
c. 9 Ohm
d. 11.25 Ohm
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