Plank's constant has the dimensions of (1) energy (2) linear momentum (3) angular momentum (4) force

1 Answer

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 wave. Mathematically, Planck's Constant (h) = Energy (E)/frequency (?). The Planck constant is named after Max Planck, the instigator of quantum theory, who discovered it in 1900.

Related questions

Description : Plank’s constant has the dimensions of : (1) energy (2) linear momentum (3) angular momentum (4) force

Last Answer : energy

Description : When net torque is zero, will be constant - (1) force (2) angular momentum (3) linear momentum (4) acceleration

Last Answer : (2) angular momentum Explanation: Since a torque (rate of change of angular momentum analogous to force) applied over time is equivalent to a change in angular momentum, then if torque is zero, angular momentum is constant.

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 : 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

Description : When light is traveling through a vacuum, what is the product of the light's wavelength and frequency equal to? w) speed of light x) Plank's constant y) momentum z) wave number

Last Answer : ANSWER: W -- SPEED OF LIGHT

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 : 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.

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 : linear momentum

Description : Out of the following pairs, which one does not have identical dimension? (1) Moment of inertia and moment of a force (2) Work and Torque (3) Angular momentum and Planck's constant (4) Impulse and Momentum

Last Answer : (1) Moment of inertia and moment of a force

Description : During planetary motion which of the following remains constant? a.Augular speed b.Linear velocity c.Angular acceleration d.Total angular momentum e.All of the above

Last Answer : b. Linear velocity

Description : In planetary motion a.The total angular momentum remains constant b.The total linear momentum remains constant c.The total linear momentum is zero d.The total angular momentum is zero e.None of the above

Last Answer : a. The total angular momentum remains constant

Description : Momentum possessed by spinning objects is called A. linear momentum B. angular momentum C. normal momentum D. degrees' momentum

Last Answer :  angular momentum

Description : Mass and velocity are combined to give A. angular momentum B. equilibrium C. acceleration D. linear momentum

Last Answer : 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 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.

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.

Description : Which of the following pairs of physical quantities have the same dimensions? (1) Force and Power (2) Work and Power (3) Work and Energy (4) Momentum and Power

Last Answer : (3) Work and Energy Explanation: The term energy is used to describe the capacity of a system to do work on another system. Energy of all types (Surface Tension, Kinetic, Potential etc.) have the same dimension and unit as that of Work.

Description : Which of the following pairs of physical quantities have the same dimensions? (1) Force and Power (2) Work and Power (3) Work and Energy (4) Momentum and Power

Last Answer : Work and 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 : Consider a car driving around a circular bend in the road. Which of the following CANNOT be constant? w) velocity of car x) speed of car y) nonrelativistic mass of car z) angular momentum of the car about the center of the circle  

Last Answer : ANSWER: W -- VELOCITY OF CAR

Description : Which of the following is a scalar quantity? (1) Velocity (2) Force (3) Angular momentum (4) Electrostatic potential

Last Answer : (3) Angular momentum Explanation: The electrostatic potential at any point in an electric field is defined as the work done in bringing a unit positive charge from infinity to that point against the electric force of the field.

Description : Which of the following is a scalar quantity ? (1) Velocity (2) Force (3) Angular momentum (4) Electrostatic potential

Last Answer : Electrostatic potential

Description : The torque acting on a system is zero. Which of the following will be conserved? a.Angular velocity b.Linear momentum c.107 dynes d.Angular momentum e.Moment of inertia

Last Answer : d. Angular momentum

Description : The angular momentum L = r x p, where r is a position vector and P is linear momentum of a body.

Last Answer : The angular momentum L = r x p, where r is a position vector and P is linear momentum of a body. If r = 4i x 6j - 3k and p = 2i x 4j - 5k, find L.

Description : The number of planks of dimensions (4 m x 50cm x 20cm) that can be stored in a pit which is 16 m long, 12 m wide and 40 m deep is -Maths 9th

Last Answer : Length of the plank=4m=400cm Breadth=50cm Height=20cm Volume of the plank=L*B*H =400*50*20 =400000cm^3 Length of the pit=16m=1600cm Breadth=12m=1200cm Height=4m=400cm Volume of the pit= L ... *1200*400 =768000000cm^3 Number of planks that can be fitted= 768000000/400000 =1920 planks is the answer.

Description : The number of planks of dimensions (4 m x 50cm x 20cm) that can be stored in a pit which is 16 m long, 12 m wide and 40 m deep is -Maths 9th

Last Answer : Solution of this question

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 : An ice skater is rotating with her arms extended. When she pulls in her arms her rate of rotation increases. Which of the following statements dealing with the process is TRUE? w) Her moment of ... conserved. y) The skater does work when pulling in her arms. z) Angular momentum is increased.

Last Answer : ANSWER: Y -- THE SKATER DOES WORK WHEN PULLING IN HER ARMS 

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 : Conservation of momentum

Description : Resultant force acting on object and rate of change of linear momentum are A. inversely related B. not related at all C. directly related D. directly proportional

Last Answer : directly related

Description : Which one of the following is a nondimensional quantity? (1) Gas constant (2) Strain (3) Co-efficient of viscosity (4) Plank's constant

Last Answer : (2) Strain Explanation: A dimensionless quantity is simply a quantity that has no units and therefore no dimensions. A ratio between two numbers is a non-dimensional or dimensionless quantity. ... in dimension over original dimension has no dimensional formula. So it is a. dimensionless quantity.

Description : Which one of the following is a non-dimensional quantity? (1) Gas constant (2) Strain (3) Co-efficient of viscocity (4) Plank’s constant

Last Answer : Strain

Description : If a gymnast sitting on a rotating stool, with his arms outstretched suddenly lowers his arm a.the angular velocity will remain constant b.the angular momentum will increase c.the angular velocity will decrease d.his moment of inertia will decrease e.107 dynes

Last Answer : d. his moment of inertia will decrease

Description : In linear motion, the energy is given by 1⁄2mv2. Similarly, in rotational motion, the rotational energy is given by A. 1/2 I ω; where I: moment of inertia of the body, ω: angular velocity B. 1/ ... angular velocity D. 1/2 I² ω²; where I: moment of inertia of the body, ω: angular velocity

Last Answer : 1/2 × I × ω²; where I: moment of inertia of the body, ω: angular velocity

Description : Which of the following have the same unit? (1) Work and power (2) Torque and moment of inertia (3) Work and torque (4) Torque and angular momentum

Last Answer : (3) Work and torque Explanation: The SI unit of work is the Newton-metre or joule (J). A Newton meter is also the SI unit of torque (also called "moment" or "moment of force").

Description : Which among the following is a vector quantity? (1) Heat (2) Angular momentum (3) Work (4) Time

Last Answer : (2) Angular momentum Explanation: Angular momentum is a vector quantity that represents the product of a body's rotational inertia and rotational velocity about a particular axis.

Description : Total angular momentum of a body is given by A. I ω; where I: moment of inertia of the body, ω: angular velocity B. I² ω; where I: moment of inertia of the body, ω: angular velocity C. I² ... the body, ω: angular velocity D. I ω²; where I: moment of inertia of the body, ω: angular velocity

Last Answer : I × ω; where I: moment of inertia of the body, ω: angular velocity

Description : When a mass is rotating in a plane about a fixed point, its angular momentum is directed along: (1) the tangent to the orbit (2) a line perpendicular to the plane of rotation (3) the line making an angle of 45° to the plane of rotation (4) the radius

Last Answer : (2) a line perpendicular to the plane of rotation

Description : You are sitting in a frictionless barber chair. The barber decides to have some fun with you, so he spins the chair. As you spin, you find that you can slow down by extending your ... increased your angular momentum y) increased your moment of inertia z) changed the direction of the momentum vector

Last Answer : ANSWER: Y --INCREASED YOUR MOMENT OF INERTIA

Description : In physics, a radian per second squared is a unit of: w) angular displacement x) angular velocity y) angular acceleration z) angular momentum.

Last Answer : ANSWER: Y -- ANGULAR ACCELERATION

Description : Which of the following will increase the ANGULAR MOMENTUM of a person spinning on a rotatable frictionless bar chair? w) moving the arms closer to the body x) moving the arms farther from the body y) ... from the body and the other arm closer to the body with spastic repetition z) none of these

Last Answer : ANSWER: Z -- NONE OF THESE

Description : In physics, a radian per second is a unit of: w) angular displacement x) angular velocity y) angular acceleration z) angular momentum.

Last Answer : ANSWER: X -- ANGULAR VELOCITY 

Description : Which of the following have the same unit ? (1) Work and power (2) Torque and moment of inertia (3) Work and torque (4) Torque and angular momentum 

Last Answer : Work and torque

Description : If the resultant force acting on a body of constant mass is zero, the body's momentum is: w) increasing x) decreasing y) always zero z) constant

Last Answer : ANSWER: Z -- CONSTANT

Description : Pick out the vector quantity (a) Energy (b) Angular momentum (c) Angle (d) None of these

Last Answer : Ans:(b)

Description : Lenz’s law is in accordance with the law of conservation of: a. momentum b. Angular momentum c. charge d. energy

Last Answer : a. momentum

Description : Angle through which an object has moved is called it's A. linear displacement B. linear distance C. angular displacement D. angular distance

Last Answer : angular displacement

Description : What do you understand by linear magnification and angular magnification? Explain how a convex lens is used as a magnifier?

Last Answer : Linear Magnification: The ratio of the size of image to the size of object is called linear magnification. Angular magnification: The ratio of the angle subtended by the image as seen through the optical ... lens used as a magnifier when an object is brought within the focal length of convex lens.

Description : Unit of plank’s constant is –

Last Answer : JS