Description : Lenz's law is an example of the law of conservation of one of the following. Is it conservation of: w) mass x) charge y) momentum z) energy
Last Answer : ANSWER: Z -- ENERGY
Description : An ideal transformer always obeys the law of conservation of........: a. energy b. momentum c. charge d. Flux
Last Answer : b. momentum
Description : Lenz's law results from the law of conservation of (A) Mass (B) Momentum (C) Energy (D) None of these
Last Answer : (C) Energy
Description : “The direction of induced current is always so as to oppose the change which causes the Current” is the statement of: a. Faraday’s law b. Lenz’s Law c. Ohm’s Law d. Kirchoff’s rule.
Last Answer : c. Ohm’s Law
Description : The Principle of an alternating current generator is based on: a. Coulomb’s law b. Ampere’s law c. Faraday’s law d. Lenz’s law
Last Answer : a. Coulomb’s law
Description : Kirchhoff 1st law is is manifestation of a. law of conservation of mass b. law of conservation of charge c. law of conservation of energy d. none
Last Answer : b. law of conservation of charge
Description : For Hydrogen atom, the allowed stationary orbits are those whose orbital angular momentum is equal to an integral multiple of h i.e., mvr = a) nh/2π b) nh x 2π c) nh / 2λ d) nh / 2πλ
Last Answer : a) nh/2π
Description : Which one of the following quantities is conserved in pair production? a) Energy b) Charge c) Linear momentum d) All
Last Answer : d) All
Description : Kirchhoff's 2nd law is consequence of law of conservation of A. energy B. charge C. momentum D. power
Last Answer : energy
Description : The first law of thermodynamics is concerned with the conservation of w) energy x) momentum y) charge z) matter
Last Answer : ANSWER: W -- ENERGY
Description : A rocket works on the principle of conservation of (a) Mass (b) Energy (c) Linear momentum (d) Angular momentum
Last Answer : Ans:(c)
Description : The working of a rocket is based on the principle of: (1) Conservation of momentum (2) Conservation of mass (3) Conservation of energy (4) Conservation of angular momentum
Last Answer : (1) Conservation of momentum Explanation: The operation of a rocket illustrates the conservation of momentum. Just before launching, the momentum of the rocket is zero. When the rocket is fired ... rocket acquires a momentum of equal magnitude in opposite direction. Thus the rocket moves upwards.
Description : A jet engine works, on the principle of conservation of - (1) linear momentum (2) angular momentum (3) energy (4) mass
Last Answer : (1) linear momentum Explanation: Linear momentum is a vector quantity defined as the product of an object's mass, m, and its velocity, v. Linear momentum is denoted by the letter p and is called ... for short: Note that a body's momentum is always in the same direction as its velocity vector.
Description : A rocket works on the principle of conservation of ______. (1) mass (2) linear momentum (3) energy (4) angular momentum
Last Answer : (2) linear momentum Explanation: A rocket works by expelling gases from one end at a very high velocity. The escaping gases have a very high speed and this with their mass translates to a very large momentum.
Last Answer : Conservation of momentum
Description : Which conservation principle is applicable in the case of the motion of a rocket? (1) Conservation of mass (2) Conservation of charge (3) Conservation of momentum (4) Conservation of energy
Last Answer : (3) Conservation of momentum Explanation: The motion of a rocket is an application of Newton's third law of motion and law of conservation of linear momentum. The operation of a rocket illustrates the ... rocket is fired, it forces a jet of hot gases with a high velocity through the nozzle.
Description : Which of the following quantities change when a proton moves at right angles to a magnetic field? a) Momentum b) Energy c) Speed d) All of these
Last Answer : a) Momentum
Description : State the need of energy conservation in electrical motor.
Last Answer : Need of energy conservation in Electrical motors: 1. Induction motors are used as electrical drives in industrial, commercial and residential sectors. 2. Considering all industrial applications, 70% of ... system. 8. To adopt advanced technology in design and to use better quality materials.
Description : Describe the following energy conservation methods of electrical motor. i) By motor survey ii) By matching loads with motor rating
Last Answer : Energy conservation methods of electrical motor: 1) By Motor Survey: Large industries have a massive population of LT motors. Load survey of LT motors can be taken-up methodically to ... -speed motors, eddy-current couplings, fluid couplings, and solid-state electronic variable speed drives.
Description : The statement that the sum of the kinetic and potential energies of a particle in the earth's gravitational field is constant is known as a.Principle of conservation of mechanical energy b.Law of gravitation c.Newton's law d.Principle of conservation of momentum e.Law of nature
Last Answer : a. Principle of conservation of mechanical energy
Description : The Navier-Stokes equation deals with the law of conservation of (A) Mass (B) Energy (C) Both (A) & (B) (D) Momentum
Last Answer : (D) Momentum
Description : The first law of thermodynamics is a restatement of the law of conservation of (A) Mass (B) Energy (C) Momentum (D) None of these
Last Answer : (B) Energy
Description : 1st law of thermodynamics is nothing but the law of conservation of (A) Momentum (B) Mass (C) Energy (D) None of these
Description : The first law of thermodynamics is a statement of conservation of (A) Heat (B) Momentum (C) Energy (D) Work
Description : Bernoulli equation deals with the law of conservation of (A) Mass (B) Momentum (C) Energy (D) Work
Last Answer : Answer: Option C
Description : Hydraulic brakes function on the principle of (A) Law of conservation of momentum (B) Law of conservation of energy (C) Pascal’s law (D) None of the above
Last Answer : (C) Pascal’s law
Description : The first law of thermodynamics is the: A. Law of conservation of momentum B. Law of conservation of mass C. Law of conservation of power D. Law of conservation of energy
Last Answer : Law of conservation of energy
Description : The first law of thermodynamics is the law of (a) conservation of mass (b) conservation of energy (c) conservation of momentum (d) conservation of heat (e) conservation of temperature.
Last Answer : Answer : b
Description : Equilibrium Method is in accordance with which of the following principle? * 1 point (A) Taylor's principle (B) D'Alembert's principle (C) Energy conservation principle (D) None of the above
Last Answer : (B) D'Alembert's principle
Description : Equilibrium Method is in accordance with which of the following principle? A. Taylor's principle B. D'Alembert's principle C. Energy conservation principle D. None of the above
Last Answer : B. D'Alembert's principle
Description : Equilibrium Method is in accordance with which of the following principle? (A) Taylor's principle (B) D'Alembert's principle (C) Energy conservation principle (D) None of the above
Description : State the law of conservation of linear momentum. It is a consequence of which law?
Last Answer : State the law of conservation of linear momentum. It is a consequence of which law? Given an example ... Does it hold good during burst of a cracker?
Description : A moving body on Earth ordinarily comes to rest by itself because of the (a) Law of inertia (b) Forces of friction (c) Conservation of momentum (d) Gravity
Last Answer : Ans:(b)
Description : The passengers standing in a bus fall in the backward direction when the stationary bus begins to move. Which of the following laws explains this situation? (1) Newton's First Law of Motion (2) Newton's Third Law of Motion (3) Newton's Second Law of Motion (4) The Law of Conservation of Momentum
Last Answer : (1) Newton's First Law of Motion Explanation: According to Newton's first law of motion (law of inertia) a body either at rest or in uniform motion will remain so unless acted on by a force When the passengers are standing on the bus, they (and the bus) are in a state of uniform motion.
Description : If no external force acts on a system of bodies, the total linear momentum of the system of bodies remains constant. Which law states that? (1) Newton’s first law (2) Newton’s Second Law (3) Newton’s Third Law (4) Principle of conservation of linear momentum
Last Answer : (4) Principle of conservation of linear momentum Explanation: Conservation of linear momentum. The principle that the linear momentum of a system has constant magnitude and direction if the system is subjected to no external force. Also called law of conservation of linear momentum
Description : If no external force acts on a system of bodies, the total linear momentum of the system of bodies remains constant. Which law states this? (1) Newton first law (2) Newton second law (3) Newton third law (4) Principle of conservation of linear momentum
Last Answer : (4) Principle of conservation of linear momentum Explanation: Principle of conservation of linear momentum states If no external force acts on a system of bodies, the total linear momentum of the system of bodies remains constant.
Last Answer : (4) Principle of conservation of linear momentum Explanation: Principle of conservation of linear momentum states if no external force acts on a system of bodies, the total linear momentum of the system of bodies remains constant.
Description : Bernoulli's equation is dependent on the (A) First law of thermodynamics (B) Third law of thermodynamics (C) Law of conservation of momentum (D) None of these
Last Answer : (D) None of these
Description : Energy stored per unit volume inside the solenoid is called: a. Energy density b. Charge Density c. Mass density d. Volume charge density
Last Answer : energy density is correct
Description : When the potential difference of 4 volt is applied across resistance, 10J energy is converted. Find the charge flows. a. 0.20 C b. 2.5C c. 5C d. 10C
Last Answer : b. 2.5C
Description : The force per unit charge is called: (a) Electric field (b) Electric field intensity (c) Electric potential energy (d) Electric potential
Last Answer : b) Electric field intensity
Description : The law that finds application in electrolysis is: a) Faraday's law b) Coulomb's law c) Ohm's law d) Lenz's law
Last Answer : Ans: A
Description : State Lenz's law.
Last Answer : The induced emf in any circuit is in a direction to oppose the effect that produced it.
Description : State Lenz’s law.
Last Answer : Lenz’s Law: It states that the direction of electromagnetically induced emf is such that it always opposes the main cause of its production. Or It is expressed by equation E = - N (dΦ/dt) volts Where – sign indicate the direction EMF is induced opposite to rate of change of flux.
Description : Which of the following pair will have identical dimensions? a.Pressure and surface tension b.Work and kinetic energy c.Momentum and force d.Moment of inertia and angular momentum e.None of the above
Last Answer : c. Momentum and force
Description : Pick out the vector quantity (a) Energy (b) Angular momentum (c) Angle (d) None of these
Description : If an electron and a photon have the same wavelength, then they will have the same – (1) velocity (2) linear momentum (3) angular momentum (4) energy
Last Answer : (2) linear momentum Explanation: When a non-relativistic electron and a non-relativistic proton are moving and have the same de Broglie wavelength, then they will have the same linear mo-mentum p = mv.
Description : Plank's constant has the dimensions of (1) energy (2) linear momentum (3) angular momentum (4) force
Last Answer : (1) energy Explanation: The Planck's constant (h) can be defined as a pro-portionality constant that relates the energy (E) of a photon to the frequency (?) of its associated electro-magnetic ... Planck constant is named after Max Planck, the instigator of quantum theory, who discovered it in 1900.
Description : Which of the following do not have identical dimensions? (A) Momentum and impulse (B) Torque and energy (C) Torque and work (D) Moment of a force and angular momentum
Last Answer : (D) Moment of a force and angular momentum