Description : The only series which lies in the visible region of the electromagnetic spectrum is a) Paschen series b) Lyman series c) Balmer series d) Pfund series
Last Answer : b) Lyman series
Description : Three spectral series, paschen series, Brackett series, Pfund series are found in the a) ultraviolet region b) visible region c) infrared region d) a & b region
Last Answer : c) infrared region
Description : The first Hydrogen spectral series was identified , in 1885, by a) J.R.Rydberg b) J.J.Balmer c) Theodore Lyman d) F. S. Brackett
Last Answer : b) J.J.Balmer
Description : The results obtained by the Balmer were formulated, in 1896, by a) Theodore Lyman b) F. S. Brackett c) J.R.Rydberg d) J.J.Balmer
Last Answer : c) J.R.Rydberg
Description : Calculate the wavelengths of the member of Lyman, Balmer and Paschen series.
Last Answer : Calculate the wavelengths of the member of Lyman, Balmer and Paschen series.
Description : For the hydrogen atom, which series describes electron transitions to the N = 2 orbit? Is it the: w) Lyman series x) Paschen series y) Balmer series z) Pfund series
Last Answer : ANSWER: Y -- BALMER SERIES
Description : For the hydrogen atom, which series describes electron transitions to the N=1 orbit, the lowest energy electron orbit? Is it the: w) Lyman series x) Balmer series y) Paschen series z) Pfund series
Last Answer : ANSWER: W -- LYMAN SERIES
Description : The region where the Lyman series contains the wavelength 1∕ λ = RH [1/ 12 – 1/ n2 ] is a) visible region b) infrared region c) ultraviolet region d ) none of these
Last Answer : c) ultraviolet region
Description : The radiations emitted by human body lies in a) Infrared region b) Ultraviolet region c) Visible region d) None of the above
Last Answer : a) Infrared region
Description : What hydrohen-like ion has the wave-length difference between the first lines of the Balmer and Lyman series equal to `593 Å`.
Last Answer : What hydrohen-like ion has the wave-length difference between the first lines of the Balmer and Lyman series equal to `593 Å`.
Description : Whenever a photon is emitted by hydrogen in balmer series it is followed by another in lyman series what wavelength does this latter photon correspond
Last Answer : Whenever a photon is emitted by hydrogen in balmer series it is followed by another in ... what wavelength does this latter photon correspond to?
Description : What hydrogen-like ion has the wavelength difference between the first lines of the Balmer Lyman series equal to `59.3nm`?
Last Answer : What hydrogen-like ion has the wavelength difference between the first lines of the Balmer Lyman series equal to `59.3nm`?
Description : In which region of electromagnetic spectrum does the Lyman series of hydrogen atom lie? (1) Visible (2) Infrared (3) Ultraviolet (4) X-ray
Last Answer : (3) Ultraviolet
Description : In which region of electromagnetic spectrum does the Lyman series of hydrogen atom lie ? (1) Visible (2) Infrared (3) Ultraviolet (4) X-ray
Last Answer : Ultraviolet
Description : The most intense line in the Brackett series of the spectrum of atomic hydrogen is the transition :-
Last Answer : The most intense line in the Brackett series of the spectrum of atomic hydrogen is the transition :- A. `n_(2)=ooton_ ... (1)=4` D. `n_(2)=4ton_(1)=3`
Description : There are four radioactive decay series called thorium `(4n)`, uranium `(4n + 2)` actinium `(4n + 3)` and neptunium `(4n + 1)` series. Neptunium serie
Last Answer : There are four radioactive decay series called thorium `(4n)`, uranium `(4n + 2)` actinium `(4n + 3)` and ... (86)^(222)Rn` D. `._(83)^(207)Bi`
Last Answer : There are four radioactive decay series called thorium `(4n)`, uranium `(4n + 2)` actinium `(4n + 3)` and ... (208)Pb` D. `.^(206)Pb, .^(208)Bi`
Last Answer : There are four radioactive decay series called thorium `(4n)`, uranium `(4n + 2)` actinium `(4n + 3)` and ... (90)^(212)Th` D. `._(84)^(212)Po`
Last Answer : There are four radioactive decay series called thorium `(4n)`, uranium `(4n + 2)` actinium `(4n ... A. actinium B. radium C. uranium D. polonium
Description : X-rays region lies between – (1) Ultraviolet and visible region (2) Visible and infra-red region (3) Gamma-rays and ultraviolet region (4) Short radio waves and long radio waves
Last Answer : (3) Gamma-rays and ultraviolet region Explanation: X-rays region lies between Gamma rays and ultra-violet region.
Description : X-rays region lies between (1) Ultraviolet and visible region (2) Visible and infra-red region (3) Gamma-rays and ultraviolet region (4) Short radio waves and long radio waves
Last Answer : Gamma-rays and ultraviolet region
Description : Pair production can be studied with a) Ultraviolet rays b) X-rays c) Microwaves d) -rays
Last Answer : d) -rays
Description : The line with smallest wavelength in the Balmer series in the hydrogen spectrum will have the frequency :-
Last Answer : The line with smallest wavelength in the Balmer series in the hydrogen spectrum will have the frequency :- A. `8. ... 1)` D. `8.05xx10^(13)s^(-1)`
Description : The energy corresponding to second line of Balmer series for hydrogen atom will be :-
Last Answer : The energy corresponding to second line of Balmer series for hydrogen atom will be :- A. 12.1 eV B. 1.89 eV C. 2.55 eV D. 13.6 eV
Description : The first emission line of Balmer series in `He^(+)` - spectrum has the wave no .in `(Cm^(_1))` (R-Rydberg constant)
Last Answer : The first emission line of Balmer series in `He^(+)` - spectrum has the wave no .in `(Cm^(_1))` (R-Rydberg constant ... )` C. `(5R)/(36)` D. `(R)/(6)`
Description : The wavelength of first member ofBalmer Series is 6563 Å. Calculate the wavelength of second member of Lyman series.
Last Answer : The wavelength of first member ofBalmer Series is 6563 Å. Calculate the wavelength of second member of Lyman ... B. 2050Å C. 6563Å D. none of these
Description : Find longest wavelength in Lyman series of hydrogen atom spectrum.
Last Answer : Find longest wavelength in Lyman series of hydrogen atom spectrum. A. 1216Å B. 216Å C. 1016Å D. 116Å
Description : A stationary hydrogen atom emits a photon corresponding to the first line of the Lyman series. What is the velocity of recoil of the atom? `(m_(H)=1.6
Last Answer : A stationary hydrogen atom emits a photon corresponding to the first line of the Lyman series. What is the velocity ... `(m_(H)=1.672xx10^(-27) kg)`
Description : A stationary helium ion emits a photon corresponding to the first line of Lyman series. That photon liberates a photoelectron form a stationary hydrog
Last Answer : A stationary helium ion emits a photon corresponding to the first line of Lyman series. That ... and ionisation energy of hydrogen atom=13.6ev.
Description : Depletion region of a junction is formed _________ (a) during the manufacturing process (b) under forward bias (c) under reverse bias (d) when temperature varies
Last Answer : (a) during the manufacturing process
Description : The potential difference set up across the depletion region is called (a) Absolute potential (b) neutral potential (c) reverse potential (d) potential barrier
Last Answer : (d) potential barrier
Description : Depletion region carries _________ (a) +ve charge (b) –ve charge (c) no charge (d) all of above
Last Answer : (c) no charge
Description : In transistor, the base region is of the order of _______ (a) 10-5 m (b) 10-2 m (c) 10-8 m (d) 10-6 m
Last Answer : d) 10-6 m
Description : N-type region has majority charge carriers as (a) Holes (b) protons (c) neutrons (d) electrons
Last Answer : (d) electrons
Description : The central region of transistor is called (a) Base (b) emitter (c) collector (d) neutral
Last Answer : (b) emitter
Description : A current of 5.8 A flows through a 0.25 m long straight conductor which is kept perpendicular in a region of uniform magnetic field of 3.7 T . The force on conductor is a) 5.4 N b) 2.4 N c) 3.4 N d) 6.4 N
Last Answer : a) 5.4 N
Description : A proton and a α particle enter a region having a perpendicular uniform magnetic field. The ratio of time period of proton (τp) to time period of α particle (τα) is a) 1:4 b) 4:1 c) 2:1 d) 1:2
Last Answer : d) 1:2
Description : A proton having mass m and charge q is projected into a region having a perpendicular magnetic field. The angle of deviation of proton when it comes out of the region with mv √2 qB ⁄ is a) π/3 b) π/4 c) π/6 d) 2 π/3
Last Answer : b) π/4
Description : Which series of hydrogen atomic spectrum lies in the visible region?
Last Answer : Answer: Balmer series.
Description : Moving coil in dynamometer wattmeter connected a) In series with fixed coil b) Across supply c) In series with load d) Across load
Last Answer : Ans: Across supply
Description : A galvanometer having a resistance of 4.5 Ω can read up to 5 mA. If it is to read 100 V, then the high resistance to be used in series will be a) 19998 Ω b) 19995.8 Ω c) 19995.5 Ω d) 19996.5 Ω
Last Answer : c) 19995.5
Description : Desirable resistance of a ________ is achieved by connecting a high resistance Rh in series with a galvanometer a) Ammeter b) Ohmmeter c) LED d) Voltmeter
Last Answer : d) Voltmeter
Description : A fuse is placed in series with the cireuit to protect against a. high power b. high voltage c. high current d. over heating
Last Answer : d. over heating
Description : Why should a resistance be introduced in a circuit in series deliberately? a. to increase current b. to decrease current c. to control current d. just to give a good look to circuit
Last Answer : b. to decrease current
Description : Three bulbs are rating 40W 60W and 100W designed to work on 220V mains. Which bulb will burn most brightly if they are connected in series across 220 V mains? a. 40 W bulb b. 60 W blub c. 100 W blub d. all will burn equally brightly
Last Answer : a. 40 W bulb
Description : Three equal resistors connected in series with a source of e m f together dissipate 10 W of power each. What will be the power dissipated if the same resistors are connected in parallel across the same source of e m f? a. 40 W b. 90W c. 100W d. 120W
Last Answer : b. 90W
Description : Find the binding energy of an electron in the ground state of a hydrogen like atom in whose spectrum the third Balmer line is equal to 108.5 mm.
Last Answer : Find the binding energy of an electron in the ground state of a hydrogen like atom in whose spectrum the third Balmer line is equal to 108.5 mm.
Description : The wave nature of electrons was EXPERIMENTALLY verified by: w) Einstein x) Davisson and Germer y) Balmer z) Bohr.
Last Answer : ANSWER: X -- DAVISSON AND GERMER
Description : Where can I find video from the PBS broadcast of the 1972 Chess Championships with Shelby Lyman as the broadcaster?
Last Answer : I’d try contacing PBS headquarters and seeing which local station produced it, then calling them. Or perhaps PBS has it in their archives, or know where it might be archived.
Description : Can you identify this Lyman Brother signed and numbered print?
Last Answer : Larry King, 87, American Hall of Fame broadcaster (Larry King Live, Larry King Now, Politicking with Larry King)