Description : An electron falls through a potential difference of `50,000 V`. What is the energy acquired by it?
Last Answer : An electron falls through a potential difference of `50,000 V`. What is the energy acquired by it?
Description : Calculate the frequency of revolution of an electron in the first orbit of an aluminum atom. Given that mass of electron `=9x10^(-31) kg, e= 1.6 xx10^
Last Answer : Calculate the frequency of revolution of an electron in the first orbit of an aluminum atom. Given that mass of ... of the orbit `=0.2xx10^(-11) m`.
Description : The magnetic field in a certain region of space is given by `B=8.35 xx10^(-2) hati T.`A proton is shot into the field with velocity `v=(2xx10^(5)hati+
Last Answer : The magnetic field in a certain region of space is given by `B=8.35 xx10^(-2) hati T.`A proton is shot into the ... .136 m` C. `0.157 m` D. `0.236 m`
Description : The potential difference of a cell in an open circuit is 6 V, which falls to 4 V when a current of 2 A is drawn from the cell. Calculate the emf and t
Last Answer : The potential difference of a cell in an open circuit is 6 V, which falls to 4 V when a ... Calculate the emf and the internal resistance of the cell.
Description : The potential difference across a cell is 1.8 V when a current of 0.5 A is drawn from it. The p.d. falls to 1.6 V when a current of 1.0 A is drawn. Fi
Last Answer : The potential difference across a cell is 1.8 V when a current of 0.5 A is drawn from it. ... . Find the emf and the internal resistance of the cell.
Description : If 48 eV of energy is required to move a charge through a potential difference of 12 V determine the charge involved?
Last Answer : Need answer
Description : Energy stored in a 2000 mF capacitor charged to a potential difference of 10 V is A. 0.12 J B. 1.3 J C. 0.10 J D. 3 J
Last Answer : 0.10 J
Description : The charge on the electron is (a) 1.6 × 10-19 C (b) 1.5 × 10-16 C (c) 21.6 × 10-19 C (d) 1.6 × 1019 C
Last Answer : Ans:(a)
Description : The resistivity of indium arsenide arsenide is `rho=2.5 xx10^(-3) Omega m` and its Hall constant is `C_(H)=10^(-2) m^(3)//c`. Find the concentration a
Last Answer : The resistivity of indium arsenide arsenide is `rho=2.5 xx10^(-3) Omega m` and its Hall ... and mobility of the charge carriers in this material.
Description : A horizontal stream of charged particles is accelerated to velocity `3 xx10^(7) m s^(-1)` immediately before being allowed into an electric field betw
Last Answer : A horizontal stream of charged particles is accelerated to velocity `3 xx10^(7) m s^(-1)` ... field between plates = rate of change of potential]
Description : A charge of 2C passes from one point to the other in a circuit. If the potential difference between the two points is 5V, the amount of work done is : (1) 10 J (2) 0.4 J (3) 2.5 J (4) 5 J
Last Answer : (1) 10 J
Description : If potential V = 20/(x 2 + y 2 ). The electric field intensity for V is 40(x i + y j)/(x 2 + y 2 ) 2 . State True/False. a) True b) False
Last Answer : a) True
Description : Given the vector potential is 16 – 12sin y j. Find the field intensity at the origin. a) 28 b) 16 c) 12 d) 4
Last Answer : c) 12
Description : The emf of a battery is 4.0 V and its internal resistance is `1.5 Omega`. Its potential difference is measured by a voltmeter of resistance `1000 Omeg
Last Answer : The emf of a battery is 4.0 V and its internal resistance is `1.5 Omega`. Its potential ... percentage error in the reading of emf shown by voltmeter.
Description : An electron is moved through a potential difference of 1 volt. How much energy in joules was used to move the electron?
Last Answer : ANSWER: 1.6 x 10-19 JOULES
Description : A potential difference of V = 100 ± 2 volt, when applied across a resistance R gives a current of 10 ± 0.5 ampere.
Last Answer : A potential difference of V = 100 2 volt, when applied across a resistance R gives a current of 10 ... percentage error in R given by R = V/I.
Description : The slope of the graph showing the variation of potential difference V on X-axis and current Y-axis gives conductor
Last Answer : The slope of the graph showing the variation of potential difference V on X-axis and ... resistivity C. reciprocal of resistance D. conductivity
Description : The ionisation potential of hydrogen atom is `13.6` volt. The energy required to remove an electron in the `n = 2` state of the hydrogen atom is
Last Answer : The ionisation potential of hydrogen atom is `13.6` volt. The energy required to remove an electron in the `n = 2` ... . 13.6 eV C. 6.8 eV D. 3.4 eV
Description : Find the work done moving a charge 2C having potential V = 24volts is a) 96 b) 24 c) 36 d) 48
Last Answer : d) 48
Description : A point charge 2nC is located at origin. What is the potential at (1,0,0)? a) 12 b) 14 c) 16 d) 18
Last Answer : d) 18
Description : Calculate the energy of the photon of infrared light energy at 1.55µm A. 1.28x10-19 J B. 1.6 x10-19 J C. 1.22 x10-16 J D. 1.9 x10-14 J
Last Answer : A. 1.28x10-19 J
Description : A well collimated parallel pencil of cathode rays falls through a potential difference `3kV` & enters the spacing between two parallel metallic plates
Last Answer : A well collimated parallel pencil of cathode rays falls through a potential difference `3kV` & enters the ... Given the length of the plates is 10 cm.
Description : The 1936 Nobel Prize in chemistry was awarded to Peter J.W. Debye for his studies of: w) kinetic energy of colliding particles x) electron configuration y) dipole moments z) conformations of cyclohexane
Last Answer : ANSWER: Y -- DIPOLE MOMENTS
Description : What is the ball's change in gravitational potential energy as it falls from point 1 to point 3?
Last Answer : What is the ball's change in gravitational potential energy as it falls from point 1 to point 3?
Description : When a body falls from an aeroplane, there is increase in its – (1) Kinetic energy (2) Mass (3) Acceleration (4) Potential energy
Last Answer : (3) Acceleration Explanation: The energy possessed by a body by virtue of its motion is called kinetic energy. Potential Energy is the energy possessed by virtue of its position or configuration. When a body falls from an aeroplane, there is increase in its acceleration.
Description : When a body falls from an aeroplane, there is increase in its (1) Kinetic energy (2) Mass (3) Acceleration (4) Potential energy
Last Answer : Acceleration
Description : If first ionisation potential of a hypothetical atom is `16 V`, then the first excitation potential will be :
Last Answer : If first ionisation potential of a hypothetical atom is `16 V`, then the first excitation potential will be : A. `10*2 eV` B. 12 eV C. 14 eV D. 16 eV
Description : When a charge moves through an electric circuit in the direction of an electric force it does one of the following four things. Does it: w) lose potential energy and gain kinetic energy x) ... lose kinetic energy y) lose both potential and kinetic energy z) gain both potential and kinetic energy
Last Answer : ANSWER: W -- LOSE POTENTIAL ENERGY AND GAIN KINETIC ENERGY
Description : In the above problem, find the potential energy of the mass with respect to datum. (Formula: P = mgz/k ) a. 4875 j b. 0.51 j c. 0.46 j d. None of the above
Last Answer : 4875 j
Description : Find the magnetic field intensity when the magnetic vector potential x i + 2y j + 3z k. a) 6 b) -6 c) 0 d) 1
Last Answer : b) -6
Description : Find the potential between a(-7,2,1) and b(4,1,2). Given E = (-6y/x 2 )i + ( 6/x) j + 5 k. a) -8.014 b) -8.114 c) -8.214 d) -8.314 View Answ
Last Answer : c) -8.214
Description : An electron microscope gives higher magnification than an optical microscope, because: (1) It uses more powerful lenses (2) the velocity of electron is smaller than that of visible (3) the ... particles (4) the wavelength of electrons is smaller as compared to the wavelength of visible light
Last Answer : (4) the wavelength of electrons is smaller as compared to the wavelength of visible light Explanation: An electron microscope uses a beam of electrons to illuminate a specimen and produce a ... photons. Magnification is the process of enlarging something only in appearance, not in physical size.
Description : An electron microscope gives higher magnifications than an optical microscope because - (1) The velocity of electrons is smaller than that of light (2) The wavelength of electrons is smaller as ... have more energy than the light particulars (4) The electron microscope uses more powerful lenses
Last Answer : (2) The wavelength of electrons is smaller as compared to the wavelength of visible light Explanation: An electron microscope is a microscope that uses a beam of accelerated electrons as a spume ... a higher resolving power than a light microscope and can reveal the structure of smaller objects.
Description : An electron microscope gives higher magnifications than an optical microscope because : (1) The velocity of electrons is smaller than that of light (2) The wavelength of electrons is smaller as ... have more energy than the light particulars (4) The electron microscope uses more powerful lenses
Last Answer : The wavelength of electrons is smaller as compared to the wavelength of visible light
Description : An electron microscope gives higher magnification than an optical microscope, because : (1) it uses more powerful lenses (2) the velocity of electron is smaller than that of visible light (3) ... particles (4) the wavelength of electrons is smaller as compared to the wavelength of visible light
Last Answer : the wavelength of electrons is smaller as compared to the wavelength of visible light
Description : The photosynthetically active (PAR) falls in the range of (A) 400 – 700 nm (B) 100- 400 nm (C) 700- 1000 nm (D) None of the above
Last Answer : (A) 400 – 700 nm
Description : An electron in an atom jumps in such a way that its kinetic energy changes from x to `x/4`. The change in potential energy will be:
Last Answer : An electron in an atom jumps in such a way that its kinetic energy changes from x to `x/4`. The change in potential ... `+(3)/(4)x` D. `-(3)/(4)x`
Description : The energy released when an extra electron is added to a neutral gaseous atom is called (a) Bond energy (b) Electron affinity (c) Ionization potential (d) Electronegativity
Last Answer : Ans:(b)
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 : In any atom the potential energy of an orbiting electron is (A) always positive (B) always negative (C) sometime positive, sometime negative (D) numerically less then its kinetic energy.
Last Answer : In any atom the potential energy of an orbiting electron is always negative
Description : An electron is moving with a velocity of `10^(7) m s^(-1)`. Find its energy in electron volts. (Mass of electron `=9.1xx10^(-31) kg` and charge of ele
Last Answer : An electron is moving with a velocity of `10^(7) m s^(-1)`. Find its energy in electron volts. (Mass ... ` and charge of electron `=1.6xx10^(-19) C`)
Description : The minimum charge on any electron be less than: (a) 1.6×10−19C (b) 3.2×10−19C (c) 1.8×10−19C (d) 9.1×10−19C
Last Answer : (a) 1.6×10−19C
Description : The charge on an electron is known to be 1.6 x 10-19 coulomb. In a circuit the current flowing is 1 A. How many electrons will be flowing through the circuit in a second?
Last Answer : 0.625 x 1019
Description : Find ∫ for steam at 100 psia and 600°F.If h = 1329.6 and v = 6.216 a. 1214 Btu / lb b. 1234 Btu /lb c. 1342 Btu / lb d. 1324 Btu /lb formula: ∫ = h– pv/ J
Last Answer : 1214Btu / lb
Description : The angular momentum J of the electron in a hydrogen atom is proportional to `n^(th)` power of r (radius of the orbit) where n is :-
Last Answer : The angular momentum J of the electron in a hydrogen atom is proportional to `n^(th)` power of r (radius of the orbit ... B. `-1` C. `(1)/(2)` D. None
Description : Who among the following discovered electron? (1) J.J Thomson (2) Max Born (3) Antoine Lavoisier (4) Mendeleef
Last Answer : (1) J.J Thomson Explanation: Electron was discovered by J. J. Thomson in 1897 when he was studying the properties of cathode ray.
Description : Electron was discovered by? A. Michael Faraday B. James Maxwell C. Yuri Gagarin D. J.J Thomson (Answer)
Last Answer : D. J.J Thomson (Answer)
Description : The electron was discovered by a) Burcherer b) Anderson c) Chadwick d) J. J Thomson
Last Answer : d) J. J Thomson
Description : An electron starting at angle `alpha=60^(@)` with a uniform magnetic induction `B=0.1 T` moves with velocity `v=10^(6) m s^(-1)`. A screen is held at
Last Answer : An electron starting at angle `alpha=60^(@)` with a uniform magnetic induction `B=0.1 T` ... to the point on the screen where the electron strikes.
Description : The resting membrane potential of a cell a. is dependent on the permeability of the cell membrane to K+ being greater than the permeability to Na+ b. falls to zero immediately when Na+ ... the equilibrium potential for Na+ e. is markedly altered if the extracellular Na+ concentration is increased
Last Answer : is dependent on the permeability of the cell membrane to K+ being greater than the permeability to Na+