Passage X Q 125-131 MCAT 4 Q 125 Which of the following changes to the circuit will decrease the electric field between the electrodes? . Increasing L.

Slides:

Advertisements

Similar presentations

Alternating Current Circuits

Advertisements

NEWTONIAN MECHANICS. Kinematic equations Frictional Force.

Grade 6: Physical Sciences – Electricity

Halliday/Resnick/Walker Fundamentals of Physics 8th edition

Chem. 133 – 2/12 Lecture. Announcements Lab Work –Supposed to Cover Set 2 Labs – but I probably won’t cover all and then will give an extra day for period.

I R V Voltage – Energy lost by the electrons through the circuit. Current – Number of electrons moving through the circuit. Resistance – the ability of.

A battery uses two different materials (usually metals) for the anode and cathode, immersed in an electrolyte (usually an acid in solution). A Simple Battery.

Have you ever held a wire that has current flowing through it? If so what did you notice about it? The wire gets hot. The increase in temperature causes.

3.2 More about photo electricity The easiest electrons to eject are on the metals surface And will have maximum kinetic energy Other electrons need more.

Also know as Topic:13 These notes were typed in association with Physics for use with the IB Diploma Programme by Michael Dickinson For further reading.

MAX PLANCK PHOTOELECTRIC EFFECT © John Parkinson.

Electromagnetic Oscillations and Alternating Current

Current and Resistance FCI.  Define the current.  Understand the microscopic description of current.  Discuss the rat at which the power.

Ohm’s Law PH 203 Professor Lee Carkner Lecture 11.

Source Transformation

Principles of Physics.  A circuit with one resistor  When one electron leaves the voltage supply another one enters  How fast this exchange occurs.

Edexcel A2 Physics Unit 4 : Chapter 2.2: Capacitance Prepared By: Shakil Raiman.

Induction and Alternating Current

By Squadron Leader Zahid Mir CS&IT Department, Superior University PHY-BE -05 Diode Biasing.

ConcepTest 17.1a Electric Potential Energy I

Electric Current and Resistance Chapter 17. Batteries Batteries create a difference in potential [J/C] between two leads called the anode and the cathode.

Electrical Work and Power. II+- Higher V 1 Lower V 2 Resistance R Current I flows through a potential difference  V Follow a charge Q : at positive end,

Twenty Questions Electricity 1. Twenty Questions

Single Phase Transformer

Ch. 2 – Anatomy of the X-ray Machine

1. ____The polarity of an electromagnet can be determined using the second right-hand rule. 2. ____Current passing through a conductor is increased from.

Physics Chapter 20: Circuits and Circuit Elements.

Electrical Resistance and Ohm’s Law Electric circuits are used to convert electrical energy into some other form of energy we need.

Chapter 20 Induced Voltages and Inductance. Faraday’s Experiment – Set Up A current can be produced by a changing magnetic field First shown in an experiment.

Passage IX Q MCAT 3 Q 119 An artery is constricted at one location to 1/2 its normal cross-sectional area. How does the speed of blood flow past.

Day 3: Eddy Currents Back EMF in Motors Eddy Currents Nature of Eddy Currents.

110/16/2015 Applied Physics Lecture 19  Electricity and Magnetism Induced voltages and induction Energy AC circuits and EM waves Resistors in an AC circuits.

Induced Voltage and Inductance

ELECTROMAGNETIC INDUCTION

Current � and � Resistance Electric Current Resistance and Ohm’s Law A Model for Electrical Conduction Resistance and Temperature Superconductor Electrical.

Series wiring means that the devices are connected in such a way that there is the same electric current through each device. One loop only for the flow.

Name: ________________ Class: _________________ Index: ________________ D.C. Circuit.

4/17/10. Electric Circuits Circuit = Any path along which electrons can flow For a continuous flow of electrons, there must be a complete circuit with.

RESISTANCE OF A SYSTEM OF RESISTORS Resistance can be joined to each other by two ways: Electricity Combination of Resistors 1. Series combination 2. Parallel.

Electrical Systems. VOCABULARYOBJECTIVES  Series circuit  Voltage drop  Kirchoff’s Voltage Law Describe a series circuit. Calculate the resistance.

(28 – 1) Chapter 28 Magnetic Fields In this chapter we will cover the following topics: Magnetic field vector Magnetic force on a moving charge Magnetic.

Electricity did not become an integral Part of our daily lives until Scientists learned to control the Movement of electric charge. This is known as.

Chapter 30 Lecture 30: Faraday’s Law and Induction: I.

Electrical Work and Power. II+- Higher V 1 Lower V 2 Resistance R Current I flows through a potential difference  V Follow a charge Q : at positive end,

CH Model of a real battery A real battery can be modeled as an ideal battery (i.e. voltage source) and an internal resistance r. The voltage across.

Ohm’s Law Resistance in Series Circuits

ELECTRIC FORCE AND WORK. Fields Electricity and gravity both act at distance Have regions (called “fields”) where they – alter space – change how objects.

Electric Circuits. Electric circuit: a complete path from the positive terminal to the negative terminal.

Electric Currents Charges in motion.. Creating Potential Difference. Alessandro Volta ( ) –Ranked potentials created by combing two metal discs.

When current is flowing in an ordinary metal wire, the magnitude of the average velocity of the electrons is closest to A) 1 m/s. B) 1 km/s. C) 10 m/s.

1© Manhattan Press (H.K.) Ltd Photoelectric effect Investigation of photoelectric effect Explanation of photoelectric effect by quantum theory Types.

AC Current An AC circuit consists of a combination of circuit elements and an AC generator or source The output of an AC generator is sinusoidal and varies.

Capacitance. Device that stores electric charge. Construction: A capacitor is two conducting plates separated by a finite distance Typically separated.

EXAMPLE 2 – PHOTODIODE A photodiode is a semiconductor device that converts light into current. The current is generated when photons are absorbed in the.

3 July July July Conventional X-rays Generator Basic components of an X-ray machine:  Electron source.  Vacuum where electrons were.

Physics 213 General Physics Lecture Last Meeting: Self Inductance, RL Circuits, Energy Stored Today: Finish RL Circuits and Energy Stored. Electric.

Passage VI Q MCAT 1 Q 107 Which of the following describes the direction of the motion of alpha, beta, and gamma rays in the presence of an external.

MAX PLANCK PHOTOELECTRIC EFFECT © John Parkinson.

Twenty Questions Electricity 1.

Chapter 28 Magnetic Fields

Chem. 133 – 2/9 Lecture.

Section 1 Electric Potential

Electrical energy By; Kemi and Kim.

Source Transformation

Example Example 1: An electric lamp is rated 110 W, 200 V. When the lamp is operated at its rated power and voltage, calculate a) the current flowing through.

Physics 2: Electricity Section 4: V, I and R in Series and Parallel

Presentation transcript:

Passage X Q 125-131 MCAT 4 Q 125 Which of the following changes to the circuit will decrease the electric field between the electrodes? . Increasing L by a factor of 2 . Decreasing L by a factor of 2 . Increasing R by a factor of 2 . Decreasing R by a factor of 2

Passage X Q 125-131 MCAT 4 Q 126 An electron is ejected from the cathode by a photon with an energy slightly greater than the work function of the cathode. How will the final KE of the electron upon reaching the anode compare to its initial PE immediately after it has been ejected? . It will be 2 times as large . It will be approximately equal . It will be 1/4 as large . It will be 0

Passage X Q 125-131 MCAT 4 Q 127 When the number of photons incident on the cathode with energies above the value of the work function increases, which of the following quantities also increases? . The number of electrons ejected . PE of each ejected electron . Magnitude of the electric field between the electrodes . Speed of the electrons at the anode

Passage X Q 125-131 MCAT 4 Q 128 Which of the following best describes the motion of an electron after it is ejected from the cathode? . It is stationary untill collisions propel it toward the anode . I moves with constant speed toward the anode . It accelerates toward the anode . It exits through a side of the vacuum photodiode

Passage X Q 125-131 MCAT 4 Q 129 When the current in the circuit described in the passage is 1 X 10 -3 A, what power is dissipated as heat in the resistor? . 1 X 10-6 W . 1 X 10-4 W . 1 X 10-2 W . 1 X 10-1 W

Passage X Q 125-131 MCAT 4 Q 130 Which of the following occurs when electrons are ejected from the cathode? . The voltage across the the electrodes reverses polarity . The voltage difference between the electrodes increases . Current flows through the circuit . The total resistance of the circuit increases

Passage X Q 125-131 MCAT 4 Q 131 Increasing the frequency of each photon that is directed at the cathode will: . decrease the number of photons ejected . increase the number of photons ejected . decrease the speed of the ejected electrons . increase the speed of the ejected electrons

Passage X Q 125-131 MCAT 4 Q Larry’s Question Increasing the frequency of each photon that is directed at the cathode will: . decrease the number of electrons ejected . increase the number of electrons ejected . decrease the speed of the ejected electrons . increase the speed of the ejected electrons . Some combination of the above

Passage VII Q 104-108 MCAT 3 Q 104 The conversion efficiency of Material B is 0.42 at a frequency of: . 3.5 X 10-15Hz . 2.8 X 102Hz . 2.8 X 1014Hz . 3.5 X 1015Hz

Passage VII Q 104-108 MCAT 3 Q 105 The purpose of the reflection coating is most likely to: . cool the device . Warm the device . maximize conversion efficiency . reduce the magnitude of the current

Passage VII Q 104-108 MCAT 3 Q 106 Suppose that 2 identical photoelectric devices are connected to the same electrical circuit in parallel with each other. Compared to the voltage generated by a single device, the total voltage supplied to the circuit by the parallel devices will be: . 4 times as large . 2 times as large . 1/2 as large . the same

Passage VII Q 104-108 MCAT 3 Q 108 See graphs