Description : In what direction are electrostatic lines of force drawn?
Last Answer : Leaving positive, entering negative
Description : An electron moves into the electrostatic field between a positive charge and a negative charge. Toward which charge will the electron move?
Last Answer : Toward the positive charge.
Description : In what way do magnetic lines of force differ from electrostatic lines of force?
Last Answer : Electrostatic lines of force do not form closed loops
Description : State four characteristics of electrostatic lines of force
Last Answer : a charged particle in straight lines and do not form closed loops. c. They have the ability to pass through any known material. d. They have the ability to distort the orbits of electrons circling the nucleus.
Description : State four characteristics of electrostatic lines of forceNEETS
Last Answer : a. They are polarized from positive to negative. b. They radiate from a charged particle in straight lines and do not form closed loops. c. They have the ability to pass through any known material. d. They have the ability to distort the orbits of electrons circling the nucleus.
Description : Why are the electrostatic fields between the electron gun elements called lenses?
Last Answer : Because they bend electron streams in much the same manner that optical lenses bend light rays.
Description : The force on a charged particle moving parallel to magnetic field lines is: w) in the direction of the field x) zero y) perpendicular to the field z) in the opposite direction of the field
Last Answer : ANSWER: X -- ZERO
Description : What is the effect upon an electron that enters the buncher gap when the potential across the grids is at 0 volts?
Last Answer : There is no effect
Description : What relationship must exist between the electron beam and the traveling wave for bunching to occur in the electron beam of a twt?
Last Answer : The traveling wave must have a forward velocity equal to or less than the speed of the electrons in the beam.
Last Answer : The space between and around charged bodies.
Description : (2) experience collision less frequently Explanation: When an electric field is applied, both the valence electrons and the free electrons move in the same direction. The hole direction is opposite to that ... to free electrons. This means mobility is also less for a hole compared to free electron.
Last Answer : Carbon dioxide is called a greenhouse gas because - (1) its concentration remains always higher than other gases (2) it is used in photosynthesis (3) it absorbs infrared radiation (4) it emits visible radiation
Description : The electrostatic energy in an electric field does not depend on which of the following? a) Magnitude of charges b) Permittivity c) Applied electric field d) Flux lines
Last Answer : c) Applied electric field
Description : The practical application of electrostatic is: (a) Photocopier (b) X-rays machines (c) Laser (d) All of above 42. The electric field lines emerge from the charges in: (a) Three dimensions (b) Two dimensions (c) One dimension (d) All of above
Last Answer : (a) Photocopier
Description : The polarization of a radio wave: A. Is perpendicular to the electrostatic field of the antenna B. Is the same direction as the electrostatic field of the antenna. C. Is the same direction ... field of the antenna. D. Is perpendicular to both the electrostatic and magnetic fields of the antenna.
Last Answer : B. Is the same direction as the electrostatic field of the antenna.
Description : Which of the following statements is/are true for coulomb damping? 1. Coulomb damping occurs due to friction between two lubricated surfaces2. Damping force is opposite to the direction of motion of vibrating body ... 2, 3 and statement 4 c. Only statement 2 d. All the above statements are true
Last Answer : c. Only statement 2
Description : An electron moves with a velocity of 2 × 106 ms-1 in the direction of a uniform magnetic field of 0.8 Tesla. The force on electron is a) 8 N b) 2 N c) 4 N d) Zero
Last Answer : d) Zero
Description : Steering of a car involves: A. A pair of forces acting along the same line and in opposite direction B. Two forces acting in the same direction C. Two forces acting along different lines and in opposite direction D. A single force
Last Answer : ANSWER: A
Description : Steering of a car involves? A. A single force B. Two forces acting in the same direction C. Two forces acting along different lines and in opposite direction. D. A pair of forces acting along the same line and in opposite direction (Answer)
Last Answer : D. A pair of forces acting along the same line and in opposite direction (Answer)
Description : If the Earth's magnetic field lines pass through the Hall probe in opposite direction, then the change in reading of voltmeter is A. thrice the Earth's magnetic flux density B. four times the Earth ... C. five times the Earth's magnetic flux density D. twice the Earth's magnetic flux density
Last Answer : twice the Earth's magnetic flux density
Description : Two schoolgirls were traveling from the city to a dacha (summer cottage) on an electric train.'I notice,' one of the girls said 'that the dacha trains coming in the opposite direction pass us every 5 ... because 60 divided by 5 equals 12.'The first girl did not agree. What do you think? -Riddles
Last Answer : If the girls had been on a standing train, the first girl's calculations would have been correct, but their train was moving. It took 5 minutes to meet a second train, but then it took the second train ... the time between trains is 10 minutes, not 5, and only 6 trains per hour arrive in the city.
Description : A goodstrain of 700 m runs at a speed of 165 km/hr. A person traveling in it observes that the mail train moving in opposite direction takes 30 seconds to cross him. Find the speed of the mail train, if it is 750 m long. A) 8.4 m/s B) 5.3 m/s C) 2.5 m/s D) 6.8 m/s
Last Answer : ANSWER:C Explanation: Speed of goods train = 165km/hr length of mail train (P) = 750m length of goods train (Q) = 700m Alternately, we can directly use the formula: Time = ( p+q) / (v1+v2) sec ( ... 45.833+v2 = 48.333 V2 = 2.5 m/s Therefore the speed of the mail train is 2.5 m/s
Description : Two goods trains having equal lengths, take 30 seconds and 45 seconds respectively to cross a telegraph post. If the length of each train is 360 meters, in what time (in seconds) will they cross each other when traveling in opposite direction? A) 36 B) 12 C) 24 D) 48
Last Answer : ANSWER:A Explanation: Speed of train = distance /time = 360/30 m/s = 12 m/s Speed of train 2 = distance /time = 360 /45 m/s = 8 m/s If 2 trains are moving in opposite ... +360 = 720 m Time = distance/speed = (720/20) = 36 Seconds Hence the required answer is 36 seconds
Description : Effect of a force on a body depends upon (A) Magnitude (B) Direction (C) Position or line of action (D) All of the above
Last Answer : (D) All of the above
Description : The mass of an electron in motion depends upon - (1) Direction of motion (2) B its velocity (3) C its velocity of e- (4) D it’s shell number
Last Answer : (2) B its velocity Explanation: The electron has a mass that is approximately 1/1836 that of the proton. Quantum mechanical properties of the electron include an intrinsic angular momentum (spin) of a half-integer value, expressed in units of the reduced Planck constant, ħ.
Description : A MOSFET can be damaged by an electrostatic discharge at approximately what minimum potential?
Last Answer : 35 volts.
Description : At approximately what minimum voltage potential should you be able to feel an electrostatic discharge?
Last Answer : 3,500 to 4,000 volts.
Description : The resonant frequency of electron wobble can be changed by variation of what force?
Last Answer : The applied magnetic field.
Description : The constant-speed electrons of an electron bunch in a reflex klystron must remain in the repeller field for what minimum time?
Last Answer : Three-quarter cycle.
Description : As shown in the illustration, the direction of electron flow through the component is _______. EL-0079 A. from terminal 'B' to terminal 'A' B. from terminal 'A' to terminal 'B' C. determined by the polarity of the applied voltage D. opposite from that in a resistor
Last Answer : Answer: B
Description : The arrow direction in the diode symbol indicates a. Direction of electron flow. b. Direction of hole flow (Direction of conventional current) c. Opposite to the direction of hole flow d. None of the above
Last Answer : b. Direction of hole flow (Direction of conventional current)
Description : What effect does closer spacing of plates have on the electron beam?
Last Answer : A greater deflection angle.
Description : What effect do longer deflection plates have on the electron beam?
Description : Debunching of the electron bunches in the higher modes of a reflex klystron has what effect on output power?
Last Answer : Power is reduced.
Description : Why does the grid have a greater effect than the plate on electron flo
Last Answer : Because it is closer to the cathode.
Description : A point defect exhibiting an apparent gain in one direction will exhibit what, when measured in the opposite direction?
Last Answer : An exaggerated loss.
Description : Momentum of two objects moving with same speed but in opposite direction upon collision is A. increased B. decreased C. is zero D. is infinite
Last Answer : is zero
Description : An electron is directly west of a proton. The force on the electron is in what direction: north, south, east, or west?
Last Answer : ANSWER: EAST or TOWARD THE PROTON
Description : 10. Imagine that you are sitting in a chamber with your back to one wall. An electron beam, moving horizontally from back wall towards the front wall, is deflected by a strong magnetic field to your right side. What is the direction of magnetic field? -Science
Last Answer : The direction of the magnetic field can be determined using the Fleming’s Left hand rule. The direction of the magnetic field will be perpendicular to the direction of current and the direction ... it can be concluded that the direction of the magnetic field inside the chamber is downward.
Description : An electron moving with a velocity of 5 10 3 m / s enters into a uniform electric field and acquires a uniform acceleration of 10 3 m / s 2 in the direction of initial velocity. i. ... which electron velocity will be doubled.? ii. How much distance electron would cover in this time.? -Science
Last Answer : Given u=5×103m/su=5×103m/s , a=103m/s2a=103m/s2, v=2u=104v=2u=104 m/s i.Using v=u+atv=u+at 104=5×103+103t104=5×103+103t or t=5 sec ii. Using s=ut+12at2s=ut+12at2 s=5×103×5+12×103×52s=5×103×5+12×103×52 =37.5×103m=37.5×103m
Description : An ELECTRON moving horizontally along the +x axis enters a region of space with a horizontal uniform magnetic field pointing in the +y direction. The electron will be deflected: w) -y direction x) +y direction y) -z direction z) +z direction
Last Answer : ANSWER: Y -- -Z DIRECTION
Description : . What primary condition must magnetic lines of force meet in order to exist?
Last Answer : Magnetic lines of force must form a continuous closed loop.
Description : If a wave's electric lines of force rotate through 360 degrees with every cycle of rf energy, what is the polarization of this wave?
Last Answer : Circular polarization.
Description : A field is approximately how many horizontal lines?
Last Answer : 525
Description : What is a substance formed by an electrostatic attraction between atoms or groups of atoms of opposite charge?
Last Answer : This is an ionic bond.
Description : When using the tight-hand rule to determine precession, which finger indicates the direction of the applied force?
Last Answer : Middle finger.
Description : What factor determines the direction a gyro will precess in response to a particular force?
Last Answer : Direction of spin.
Description : In what direction will a gyro precess in response to an outside force?
Last Answer : Perpendicular (90º) to the force.
Description : In a TDR system connected for addition in what direction will the TDR rotor field turn when the TX rotor to which it is connected turns counterclockwise?
Last Answer : Clockwise.