Description : The branch of physics that deals with the investigation of wavelengths of electro magnetic radiation emitted or absorbed by atoms is known as a) spectroscopy b) astroscopy c) radioscopy d) stereoscopy
Last Answer : a) spectroscopy
Description : Which of the following statement is correct: (a) Similar charges attract each other (b) Similar charges attract and repel each other (c) Similar charges repel each other (d) Similar charges neither attract nor repel 9. Metals are good conductors of electricity because they have:
Last Answer : (c) Similar charges repel each other
Description : The conventional current is due to the flow of a. atoms and molecules b. positive charges c. negative charges d. both b and c
Last Answer : b. positive charges
Description : In liquids and gases the current is due to the motion a. negative charges b. positive charges c. both negative and positive charges d. neutral particles
Last Answer : c. both negative and positive charges
Description : A particular device uses electromagnetism by using electricity to move magnets. The magnets in this device are than used to work. Which device uses electromagnetism In this way?
Last Answer : An electric motor
Description : Gauss' law of electricity, Gauss' law of magnetism, Faraday's law of induction, and Amperes' law form the basic equations of electromagnetism. This combination is collectively known as: w) Coulomb's equations x) Volta's equations y) Fermi's equations z) Maxwell's equations
Last Answer : ANSWER: Z -- MAXWELL'S EQUATIONS
Description : The branch of physics which deals with the measurement of light. emitted by objects is called?
Last Answer : Photometry
Description : The branch of physics that deals with the motion of a very small particle is called- a)Field theory b)Particle Physics c)Quantum Mechanics d)Atomic Physics
Last Answer : c)Quantum Mechanics
Description : A magnetic field exists around (a) iron (b) copper (c) aluminium (d) moving charges
Last Answer : (d) moving charges
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 electric field exist around: (a) Charges (b) On the left side (c) At the –ve charge (d) At the +ve charge
Last Answer : (a) Charges
Description : The space around the charge within which other charges are influenced by it is called: (a) Electric field (b) Magnetic field (c) Electric flux (d) Electric intensity
Last Answer : a) Electric field
Description : In case of two identical charges placed at certain distance, the electric lines of force are: (a) Curved (b) Straight lines (c) Both (a) and (b) (d) None of these
Last Answer : a) Curved
Description : The electric force between two charges placed in air is 2 Newton. When placed in a medium of ∈r = 80, the force reduced to: (a) 0.029 N (b) 0.025 N (c) 0.03 N (d) 0.04 N
Last Answer : (b) 0.025 N
Description : When the medium is insulator the electrostatic force between the charges is: (a) Decreased (b) Zero (c) Increased (d) None of above
Last Answer : (a) Decreased
Description : Common type of Laser used in physics laboratories is a) hydrogen neon Laser b) helium-neon Laser c) carbon neon Laser d) argon neon laser
Last Answer : b) helium-neon Laser
Last Answer : yours Tons Accordingly AC Use To do Can However That Depending By You How much? Tuk Watt A. That Usage Do His On. You A. Except Sources Accordingly Get out To do Can AC How much? Current Usage Doing. Source : ... = 6000/1000 = 8 _ _ In other words You 3 Hours Usage If you do 3 Unit Cost Will be
Last Answer : electricity Fan Gently Or Loud Anyway Let's go No. Why Electricity Same Cost Is 3 Because Fan To walk Control Is Regulator Or Regulator Through And Electricity Cost The work Regulator Before The end ... More Power Eat Regulator The rest Eat Fan. So Turn around Back Electricity Cost The same Being 3
Last Answer : Singer Refrigerator And Walton Refrigerator Electricity Affordable 3
Description : Metals are good conductors of electricity because they have: (a) Large number of bounded electrons (b) Small number of electrons (c) Large number of free electrons (d) Small number of free electrons
Last Answer : (c) Large number of free electrons
Description : Rest mass of the photon is a) Infinite b) Zero c) Very small d) 1.67 10-27 Kg
Last Answer : b) Zero
Description : If a material object moves with the speed of light ‘c’ its mass becomes a) equal to its rest mass b) Four times of its rest mass c) Double of its rest mass d) Infinite
Last Answer : d) Infinite
Description : If energy of incident photon is greater than the rest mass energy of electron positron pair, the surplus energy is shared by the pair as, a) Potential energy b) Thermal energy c) Electronic energy d) Kinetic energy
Last Answer : d) Kinetic energy
Description : A rod at rest appears to an observer just a mere point when he moves across it as speed, a) Equal to the speed of light b) Double the speed of light c) Three-fourth the speed of light d) None of the above
Last Answer : a) Equal to the speed of light
Description : Tick the wrong statement. a) Velocity of light is independent of the motion of the observer. b) Velocity of light in free space is the same in all directions. c) Velocity of light in free space is different in different directions. d) Absolute motion or absolute rest is meaningless to talk about
Last Answer : c) Velocity of light in free space is different in different directions
Description : A galvanometer in which the coil quickly comes to rest is called a ________ galvanometer a) Ballistic b) Mirror c) Astatic d) Dead beat
Last Answer : d) Dead beat
Description : Coulomb law is employed in a) Electrostatics b) Magnetostatics c) Electromagnetics d) Maxwell theory
Last Answer : a) Electrostatics
Description : Electrostatics : Electric Field & Potential
Last Answer : NPTEL Distributed under Creative Commons Attribution-ShareAlike - CC BY-SA.
Description : Michael Faraday was known by his work on: (a) Electric force (b) Weak nuclear force (c) Strong nuclear force (d) Gravitational force
Last Answer : (a) Electric force
Description : Who first noticed electromagnetism ?
Last Answer : : Scientist Orested first noticed electromagnetism.
Description : Dipoles in any electric field undergo a) Magnetism b) Electromagnetism c) Magnetisation d) Polarisation
Last Answer : d) Polarisation
Description : Who founded and named the science of electromagnetism?
Last Answer : Andre Marie Ampere
Description : Define: (i) Electromagnetism (ii) Magnetic flux.
Last Answer : i)Electromagnetism : It is the magnetism generated by electricity. OR It is defined as the phenomenon associated with electric and magnetic fields and their interactions with each other. ii) Magnetic flux : The total number of magnetic lines of force in a magnetic field is called magnetic flux.
Description : How is electromagnetism used today?
Last Answer : The base of electrical engineering is electromagnetism. You found electromagnetism everywhere in a electrical devices around you.
Description : A value return in form Est 5 or Est 6(a) as the case may be should be submitted with every proposal a) In connection with experimental post offices b) For increasing the establishment charges of a ... sub office d) For closing an office on the ground of its being unremunerative. e) All the above
Last Answer : e) All the above
Description : Having a problem with cell phone charges and looking for new deals.?
Last Answer : There are many good deals that you can find for some cell phone chargers. Wal-Mart have some real good deals on cell phone chargers. You can also go online to their website.
Description : Pay Electricity Bill Charges Online To Save Money?
Last Answer : Consumers can pay electricity bill charges online to save the cost of a stamp. While one stamp might not sound like a lot of money, every penny counts. Over the course of a year, the postage used ... , banking fees and the late charges that happen when the utility bill payments are lost in the mail.
Description : Which of the following is not a fixed cost? (1) Salaries of administrative staff (2) Rent of factory building (3) Property taxes (4) Electricity charges
Last Answer : (1) Salaries of administrative staff Explanation: Fixed costs arc business expenses that are not dependent on the level of goods or services produced by the business. They tend to be time- ... and are often referred to as overhead costs. The salaries of administrative staff are variable costs.
Description : A switchboard ammeter indicates a reading slightly above 'zero' when the leads are disconnected, this is caused by _____________. A. mechanical misalignment of the meter pointer B. a poor ground for the meter case C. static electricity in the air D. capacitors inside the meter storing charges
Last Answer : Answer: A
Description : An ammeter reads slightly above 'zero' when its leads are disconnected, this is a result of ___________. A. mechanical misalignment of the meter pointer B. a poor ground for the meter case C. static electricity in the air D. resistors inside the meter storing charges
Description : Define the following terms related to tariff: (i) Connected load (ii) Unit consumed (iii) Fixed charges (iv) Electricity Tax
Last Answer : (i) Connected load It is the sum of the power ratings (Watts or kW or MW) of all devices and machines existing (installed) in the premises of consumer. It is used to decide the ... a percentage of the total electricity bill which includes all amounts that go to the electricity supply agency.
Description : Please ripley me due to emergency
Last Answer : To calculate the flux density in the ring, you need to use the following formula: B = (μ * I * N) / (2 * π * r) where: B is the flux density in the ring (in teslas) μ is the relative permeability ... 2 * π * 0.127 m) = 0.53 T So the flux density in the ring would be approximately 0.53 teslas.
Description : In a thyristor Latching current is ________ than Holding current a) Equal b) Less c) Greater d) None
Last Answer : Ans: Greater
Description : The force between two long parallel conductors is inversely proportional to (a) radius of conductors (b) current in one conductor (c) product of current in two conductors (d) distance between the conductors
Last Answer : (d) distance between the conductors
Description : A conductor of length L has current I passing through it, when it is placed parallel to a magnetic field. The force experienced by the conductor will be (a) zero (b) BLI (c) B2LI (d) BLI2
Last Answer : (a) zero
Description : The left hand rule correlates to (a) current, induced e.m.f. and direction of force on a conductor (b) magnetic field, electric field and direction of force on a conductor (c) self induction, ... and direction of force on a conductor (d) current, magnetic field and direction of force on a conductor
Last Answer : (d) current, magnetic field and direction of force on a conductor
Description : Fleming's left hand rule is used to find (a) direction of magnetic field due to current carrying conductor (b) direction of flux in a solenoid (c) direction of force on a current carrying conductor in a magnetic field (d) polarity of a magnetic pole
Last Answer : (c) direction of force on a current carrying conductor in a magnetic field
Description : The two conductors of a transmission line carry equal current I in opposite directions. The force on each conductor is (a) proportional to 7 (b) proportional to X (c) proportional to distance between the conductors (d) inversely proportional to I
Last Answer : (b) proportional to X
Description : The termresponsivityasit appliesto a light detectorisbest described as a. the time required for the signal to go from 10 to 90 percent of maximum amplitude b.the ratio ofthediode output currentto ... of output current to output power d. the ratio of output current to input current
Last Answer : b.the ratio ofthediode output currentto opticalinputpower
Description : What is a current transformer and voltage transformer?*
Last Answer : In electrical engineering, a current transformer (CT) is used for measurement of electric currents. Current transformers, together with voltage transformers (VT) (potential transformers (PT)), ... transformers are commonly used in metering and protective relays in the electrical power industry.