Description : A moving neutron collides with a stationary α-particle. The fraction of the kinetic energy lost by the neutron is – (1) ¼ (2) 1/16 (3) 9/25 (4) 16/25
Last Answer : (4) 16/25
Description : A white ball of mass 1.0 kg moving with initial speed u = 0.5 m s-1 collides with stationary red ball of same mass, they move forward making angle of 90° between their paths. Their speed is A. 1 m s-1 B. 0.354 m s-1 C. 2 m s-1 D. 3 m s-1
Last Answer : 0.354 m s-1
Description : A freight car weighing 20 tons and moving at a speed of 7 miles per hour on a horizontal track collides and couples with a stationary car that weighs 15 tons. Neglecting friction, determine the velocity of the coupled cars.
Last Answer : ANSWER: 4 MILES PER HOUR
Description : A ball of mass 1 kg moving with a velocity of 2 m/sec collides directly with a stationary ball of mass 2 kg. If the first ball comes to rest after the impact the velocity of second ball after impact will be a.1.5 m/sec b.0.5 m/sec c.Zero d.2 m/sec e.1.0 m/sec
Last Answer : e. 1.0 m/sec
Description : If a trolley collides with a stationary trolley of double mass, then they move off with A. half of the original velocity B. one third of original velocity C. double the original velocity D. triple the original velocity
Last Answer : one third of original velocity
Description : In the Compton effect, a photon of wavelength l (read: lambdw) collides with a stationary electron. The wavelength of the emitted photon is: w) longer than l x) shorter than l y) the same as l z) no photon is emitted
Last Answer : ANSWER: W -- LONGER THAN l
Description : A stationary `._(82)^(200)Pb` nucleus emits an `alpha`-particle with kinetic energy `T_(alpha) = 5.77 MeV`. Find the recoil velocity of a daughter nuc
Last Answer : A stationary `._(82)^(200)Pb` nucleus emits an `alpha`-particle with kinetic energy `T_( ... accounted for by the recoil energy of daughter nucleus ?
Description : Which of the following statements is TRUE about an ELASTIC collision between two particles? Is it true that: w) neither particle loses any of its kinetic energy x) neither particle loses any of ... that lost by the other z) the total kinetic energy before and after the collision remains constant
Last Answer : ANSWER: Z -- THE TOTAL KINETIC ENERGY BEFORE AND AFTER THE COLLISION RE
Description : In a springy collision, if the fast moving trolley collides with a slow one, then the fast one will bounce back at speed of A. slow one B. less than slow one C. more than slow one D. with the same speed as before
Last Answer : slow one
Description : An electron collides with a fixed hydrogen atom in its ground state. Hydrogen atom gets excited and the colliding electron loses all its kinetic energ
Last Answer : An electron collides with a fixed hydrogen atom in its ground state. Hydrogen atom gets excited and the colliding ... eV C. 12.1 eV D. 13.6 eV
Description : What is a neuron? (1) Basic unit of energy (2) Particle released during radioactivity (3) The anti-particle of neutron (4) Basle unit of nervous system
Last Answer : (4) Basle unit of nervous system Explanation: A neuron is a nerve cell that is the basic building block of the nervous system. Neurons are specialized to transmit information ... highly specialized nerve cells are responsible for communicating information in both chemical and electrical. forms.
Description : What is a neuron ? (1) Basic unit of energy (2) Particle released during radioactivity (3) The anti-particle of neutron (4) Basic unit of nervous system
Last Answer : Basic unit of nervous system
Description : A proton, a deuteron and an `alpha`- particle having the same kinetic energy are moving in circular trajectors in a constant magnetic field. If `r_p,
Last Answer : A proton, a deuteron and an `alpha`- particle having the same kinetic energy are moving in circular trajectors in a ... )` D. `r_(p)=r_(d)=r_(alpha)`
Description : __________ forces act on a particle moving through a stationary fluid (A) Gravity (B) Drag (C) Buoyant (D) All (A), (B), & (C)
Last Answer : (D) All (A), (B), & (C)
Description : A hydrogen atom moving at speed `v` collides with another hydrogen atom kept at rest .Find the minimum value of `v` for which one of the atoms may get
Last Answer : A hydrogen atom moving at speed `v` collides with another hydrogen atom kept at rest .Find the minimum value ... hydrogen atom `= 1.67 xx 10^(-27)kg`
Description : A ball is moving with a speed v towards north, collides with an identical ball, moving with the same speed towards east. After the collision, the two balls stick together and move towards north –east. The speed of the combination is (a) 2v (b) 3v (c) v (d) v/2
Last Answer : Ans:(c)
Description : An x-ray photon collides with a free electron, and the photon is scattered. During this collision there is conservation of: w) momentum but not energy x) neither momentum nor energy y) energy but not momentum z) both momentum and energy
Last Answer : ANSWER: Z -- BOTH MOMENTUM AND ENERGY
Description : The physicist Chadwick is known for his association with: w) the alpha particle x) the neutron y) the cloud chamber z) the electron
Last Answer : ANSWER: X -- THE NEUTRON
Description : The anti-particle to an electron is: w) proton x) positron y) neutron z) anti-proton
Last Answer : ANSWER: X -- POSITRON
Description : The following particles move with same kinetic energy. Which of them has maximum momentum? (1) Electron (2) Proton (3) Deutron (4) Alpha Particle
Last Answer : (4) Alpha Particle Explanation: The formula for kinetic energy in terms of momentum for fundamental particles is basically just a quantized version of the classical formula, KE=(P^2)/2m, where KE is kinetic energy, p is momentum and m is the particle’s mass.
Description : The following particles move with same kinetic energy. Which of them has maximum momentum ? (1) Electron (2) Proton (3) Deutron (4) Alpha Particle
Last Answer : Alpha Particle
Description : Bernoulli's principle shows that, at points in a moving fluid where the potential energy change is very small A. the pressure is low where the velocity is low and similarly, the pressure is ... of the moving fluid D. pressure remain independent of the speed of the stationary fluid
Last Answer : the pressure is low where the velocity is high and conversely, the pressure is high where the velocity is low
Description : Two objects A and B are moving with same momentum. Mass of object 'B' is greater then mass of object 'A'. Which of the two object will have higher kinetic energy? -Physics
Last Answer : Let m1 and m2 be the masses of the body Let m1>m2Given that m1v1=m2v2v2v1=m1m2∴ Ratio between their kinetic energies , =K2K1=21m2v2221m1v12⟹K2K1=m2m1×m12
Description : A body is moving with velocity 4 m/s , possesses 56 Joules of Kinetic Energy. The momentum of body will be equal to -Physics
Last Answer : (d) 28 kgms-1
Description : Kinetic energy depends on – (1) the velocity or speed of the moving body. (2) the mass of the moving body (3) the pressure of the moving body (4) both mass and velocity of the moving body
Last Answer : (4) both mass and velocity of the moving body Explanation: Kinetic energy is the energy associated with the movement of objects. The amount of kinetic energy that an object has depends upon two variables: the mass (m) of the object and the speed (v) of the object.
Description : A body moving in a circular path with a constant speed has a – (1) constant velocity (2) constant acceleration (3) constant kinetic energy (4) constant displacement
Last Answer : (3) constant kinetic energy Explanation: In circular motion, the magnitude of the velocity of the body is constant but the direction is constantly changing. This means that, even though the speed is ... accelerating. At any instant, the direction of the velocity is a tangent to the circular path.
Description : A car with a mass of 1000 kilogram is moving at a speed of 10 meters per second. The kinetic energy of the car is: w) 100 Joules x) 5000 Joules y) 10,000 Joules z) 50,000 Joules
Last Answer : ANSWER: Z -- 50,000 JOULES
Description : A body moving in a circular path with a constant speed has a (1) constant velocity (2) constant acceleration (3) constant kinetic energy (4) constant displacement
Last Answer : constant kinetic energy
Description : Kinetic energy depends on (1) the velocity or speed of the moving body. (2) the mass of the moving body (3) the pressure of the moving body (4) both mass and velocity of the moving body
Last Answer : both mass and velocity of the moving body
Description : What happens when an unstoppable object collides with an unmoveable object?
Last Answer : I’m guessing a black hole swallows the earth
Description : The apparent weight of a person in a lift which is moving down with uniform acceleration is _______. (1) greater than the weight when the person is stationary (2) twice the weight when the person ... than the weight when the person is stationary (4) same as the weight when the person is stationary
Last Answer : (3) less than the weight when the person is stationary
Description : Of the following particles, the particle having the least mass is (a) Meson (b) Neutron (c) Electron (d) Proton
Description : The particle required to continue the chain process of Uranium fission is – (1) Electron (2) Proton (3) Neutron (4) Positron
Last Answer : (3) Neutron Explanation: Fission as encountered in the modern world is usually a deliberately produced man-made nuclear reaction induced by a neutron. The nuclear fuels undergo fission when struck by fission ... rate in a nuclear reactor or at a very rapid uncontrolled rate in a nuclear weapon.
Description : Which of the following particles has the dual nature of particle-wave? (1) Electron (2) Meson (3) Proton (4) Neutron
Last Answer : (1) Electron
Description : Name the particle that is most essential to continue the chain reaction during the fission of uranium - (1) Electron (2) Proton (3) Neutron (4) Positron
Last Answer : (3) Neutron Explanation: Nuclear fission is either a nuclear reaction or a radioactive decay process in which the nucleus of an atom splits into smaller parts (lighter nuclei), often producing ... in the modern world is usually a deliberately produced manmade nuclear reaction induced by a neutron.
Description : Mass of a positron is same as that of a/an (A) Electron (B) α-particle (C) Proton (D) Neutron
Last Answer : (A) Electron
Description : In the nuclear reaction, 93N239→ 94Pu 239 + ?; the missing particle is a/an (A) Electron (B) Proton (C) Neutron (D) Position
Description : Which of the following particles has the dual nature of particle– wave? (1) Electron (2) Meson (3) Proton (4) Neutron
Last Answer : Electron
Description : The particle required to continue the chain process of Uranium fission is : (1) Electron (2) Proton (3) Neutron (4) Positron
Last Answer : Neutron
Description : Name the particle that is most essential to continue the chain reaction during the fission of uranium- (1) Electron (2) Proton (3) Neutron (4) Positron
Description : A particle in simple Harmonic Motion while passing through mean position will have a.Maximum kinetic energy and minimum potential energy b.Average kinetic energy and average potential energy c. ... energy d.Maximum kinetic energy and maximum e.Minimum kinetic energy and minimum potential energy
Last Answer : a. Maximum kinetic energy and minimum potential energy
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 : A particle in SHM while passing through mean position will have a.maximum kinetic energy and maximum potential energy b.107 dynes c.maximum kinetic energy and minimum potential energy d.average kinetic energy and average potential energy. e.minimum kinetic energy and maximum potential energy
Last Answer : c. maximum kinetic energy and minimum potential energy
Description : Assertion If the path of a charged particle in a region of uniform electric and magnetic field is not a circle, then its kinetic energy may remain con
Last Answer : Assertion If the path of a charged particle in a region of uniform electric and magnetic field is ... VxxB),` where symbols have their usual meanings.
Description : Assertion An `alpha-`particle and a deuteron having same kinetic energy enter in a uniform magnetic field perpendicular to the field. Then, radius of
Last Answer : Assertion An `alpha-`particle and a deuteron having same kinetic energy enter in a uniform magnetic ... If Assertion is false but Reason is true.
Description : When a charged particle enters a uniform magnetic field its kinetic energy
Last Answer : When a charged particle enters a uniform magnetic field its kinetic energy A. remains constant B. increases C. decreases D. becomes zero
Description : A particle is acted upon by a force of constant magnitude which is always perpendicular to the velocity of the particle. The motion of the particle takes place in a plane. It follows that (a) Its ... ) Its acceleration is constant (c) Its kinetic energy is constant (d) It moves in a circular path
Last Answer : Ans:(d)
Description : The total energy of a liquid particle in motion is equal to (A) Pressure energy + kinetic energy + potential energy (B) Pressure energy - (kinetic energy + potential energy) (C) Potential energy - (pressure energy + kinetic energy (D) Kinetic energy - (pressure energy + potential energy)
Last Answer : Answer: Option A
Description : Which of the following statement is wrong? (A) A flow whose streamline is represented by a curve is called two dimensional flow. (B) The total energy of a liquid particle is the sum of potential energy, ... (D) A pitot tube is used to measure the velocity of flow at the required point in a pipe.
Last Answer : Answer: Option C
Description : In Newton's law range, the terminal velocity of a solid spherical particle falling through a stationary fluid mass varies as the __________ of its diameter. (A) Inverse (B) Square root (C) Second power (D) First power
Last Answer : (B) Square root