Two identically charged electroscopes are shown below. ут A student touches Electroscope I with a neutral metal rod. The student touches Electroscope II with a neutral glass rod. Electroscope I Electroscope II Å 10. Which of the following diagrams best shows the leaves of the electroscopes after the electroscopes are touched with the rods? A. I II TT B. TT II 74
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answer is b, explain?
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- A negatively-charged balloon is held above (without touching) a neutral electroscope. The presence of the nearby balloon causes the needle of the electroscope to deflect. a. Draw the location and type of excess charges on the "polarized" neutral electroscope. b. Explain how the balloon has induced the temporary charge upon the electroscope (i.e., describe the direction of electron movement).Diagsm i. Dingram ii. Dingram iii. Aneutal metal sphere rests upon an insulating platfomm. When the + aluminm plate is touched to the metal sphere, electrons are dzavm off the sphere and onto the alumirm plate. The aluninum plate has less encess + charge and the metal sphere now has an escess of + change. Which best describes the diagrams above If the charge on the aluminum is 0.14 C, then after contact the charge on the metal sphere will be Word Bank: charging by radiation charging by induction 0.14 0.7 charging by convection 0.07 charging by conduction 0.28 charging by frictionElectric Field (positive charge) 1. Drag a +1nC charge to the center of screen so that the electric field directions for the charge are visible i.e. the space around the charge is altered to create an electric field. 2. Notice that the charge makes an alteration everywhere in space. 3. This is an electric field diagram for a positive point charge. It is constructed by drawing electric field vectors at a number of points around the positive charge. 4. In what direction do the electric field vectors point the positive charge? 5. What do you observe about the electric field direction, if you place a -InC in the space?
- Use the following information to answer question 14 and Numerical Response 2. A beam of electrons is incident on a region containing a uniform electric field as shown below. The electrons in the beam each have a speed of 4.5 x 105 m/s. While in the electric field the electrons accelerate toward the top plate. Positively charged plate - Electron beam Negatively charged plate Note: You will want to make your measurements this diagram. 14. Based on your measurements, the strength of the uniform electric field in the region N/C. is 10V. Electric Fields (Be sure to disconnect the cup from the electroscope.) This exercise is only to see what happens qualitatively and to think of what you see in terms of an electric field. Using the rubber rod, charge the electroscope by induction. (See previous exercise.) This should leave it positively charged. Now recharge the rubber rod as much as possible and move it slowly toward the glass on the front of the case of the electroscope, but of course, not too close. About .3 meters should be good. Notice the response of the gold foil to any motion of the rod? Notice the field acts right through the glass. The response would be the same even if there were a complete vacuum, that is empty space, between the rod and the gold foil. The electric force acts at a distance between the two charged objects, even through empty space. Try also bringing a charged glass rod up in place of the rubber rod. (a) How does the gold leaf respond in each case? (b) How does this indicate action at a…Calculate the acceleration of the image charge and how far it moves in the electric field of the image during 1.0 ms? The charge starts moving from rest and the electric field continues infinitely far in every direction. b) In this situation, the charge has an initial speed as shown in the picture. Tell me verbally what the booking's trajectory is after the initial situation. The electric field is infinitely large in size in every direction. c) How far does the charge move in 1.0 ms in the x- and y-axis directions at point b?
- Say that you put a negatively charged insulating rod close to a neutral conduvtir. A.) Draw a diagram of the charges in/on each object. B.) Is the neutral insulator attracted to or repelled from the rod? ExplainCapacitance, Charge and Voltage: Q = CV 1. Click the Reset Button on the bottom right of the PHET simulation. 2. CHECK Plate Charges and Bar Graphs boxes in the upper right so your display resembles the graph below. 3. SET the Plate Area to 200 mm² and the Separation to 4.0 mm. Capactance Tup Pate Charge oc Sured Energy Pu Charges r Graphs O e Fd Cument Direction 1500 V 4. Connect the voltmeter across the capacitor by placing the red on the top plate and black on bottom. If the voltmeter reads a negative, switch the red and black. 5. Set the battery Voltage to 0.25 V. Record the measured plate charge, Q. 6. Repeat Step 5 for each Voltage in Table 3. Table 3: Charge and Voltage Voltage |(V) Plate Charge |(pC) 0.25 V 0.50 V 0.75 V 1.00 V 1.25 V 1.50 VA 4 g ball with a charge of -9 µC hangs by a thread between two oppositely charged parallel plates as shown below. The distance between the ball & the edges of the plates is much greater than the distance between the plates. Each plate has the same constant uniform charge density. Determine the voltage between the plates. 970.6 V Determine the polarity of each plate. You will not receive credit until you have correctly selected the polarities of both plates. 24 left plate positive right plate negative 6 mm
- Use the attached diagram to answer the following questions. 1. At P the electric field is zero. Explain how the electric field can be zero. 2. The magnitude of the charge on X is Q and that on Y is q. The distance between X and Y is 0.600 m. The distance between P and Y is 0.820 m.Determine, to one significant figure, the ratio Q/q.Given the diagram where q1 is the positive and q2 is the negative charge, while q0 is (0,d), answer the following: a.) What is the net electric field at q0? b.) What would be the electric force acting on charge q0?Write the word TRUE if the statement is correct and if not, underline the word or statement that make the sentence incorrect and write the correct answer on the space provided. 1. Electrostatics, as the name implies, is the study of moving electric charges. 2. The word electrostatics comes from the Greek word “elektron". 3. The ancient Greeks discovered the electric charge as early as 600 B.C. 4. An ion is an atom that has lost or gained one or more electrons. 5. Surrounding the nucleus are the electrons, which orbit the nucleus out to distances on the order of 10-10 m.