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When a bicycle is in motion, the force of friction exerted by the ground on the two wheels is such that it acts a) In the backward direction on the front wheel and in the forward direction on the rear wheel. (b) In the forward direction on the front wheel and in the backward direction on the rear wheel. (c) In the backward direction on both the front and rear wheels. (d) In the backward direction on both the front and rear wheels.
8 32194A certain radioactive element A, has a half life = t seconds. In (t/2) seconds the fraction of the initial quantity of the element so far decayed is nearly (a) 29% (b) 15% (c) 10% (d) 45%
1 10764Which of the following plots would be a straight line ? (a) Logarithm of decay rate against logarithm of time (b) Logarithm of decay rate against logarithm of number of decaying nuclei (c) Decay rate against time (d) Number of decaying nuclei against time
1 5561A radioactive element x has an atomic number of 100. It decays directly into an element y which decays directly into element z. In both processes a charged particle is emitted. Which of the following statements would be true? (a) y has an atomic number of 102 (b) y has an atomic number of 101 (c) z has an atomic number of 100 (d) z has an atomic number of 101
1 6161If the sum of the roots of the equation ax2 + bx + c=0 is equal to the sum of the squares of their reciprocals then a/c, b/a, c/b are in (a) AP (b) GP (c) HP (d) None of these
1 9739A man speaks the truth 3 out of 4 times. He throws a die and reports it to be a 6. What is the probability of it being a 6? (a) 3/8 (b) 5/8 (c) 3/4 (d) None of the above
11 30720If cos2A + cos2B + cos2C = 1 then ABC is a (a) Right angle triangle (b) Equilateral triangle (c) All the angles are acute (d) None of these
1 11100The mass number of a nucleus is (a) Always less than its atomic number (b) Always more than its atomic number (c) Sometimes more than and sometimes equal to its atomic number (d) None of the above
2 28005The maximum KE of the photoelectron emitted from a surface is dependent on (a) The intensity of incident radiation (b) The potential of the collector electrode (c) The frequency of incident radiation (d) The angle of incidence of radiation of the surface
1 4458Which of the following is not an essential condition for interference (a) The two interfering waves must be propagated in almost the same direction or the two interfering waves must intersect at a very small angle (b) The waves must have the same time period and wavelength (c) Amplitude of the two waves should be the same (d) The interfering beams of light must originate from the same source.
2 7468When X-Ray photons collide with electrons (a) They slow down (b) Their mass increases (c) Their wave length increases (d) Their energy decreases.
1 6942An electron emits energy (a) Because its in orbit (b) When it jumps from one energy level to another (c) Electrons are attracted towards the nucleus (d) The electrostatic force is insufficient to hold the electrons in orbits.
1 3602In a balanced chemical equation (a) Atoms are conserved (b) Molecules are conserved (c) Moles are conserved (d) Reactant and product molecules are preserved.
1 22832
Have you learned any new math tactics or shortcuts with your job?
can any one give me the question bank for Lab Technician to appear for my HAAD exam . Please send me the Qs. my mail Id is abdullahraj10@yahoo.com Please help. thks.
Shall i get Section engineer S & T question paper? (Railway recruitment board)
i am preparing for Drug inspector exam.If u have previous questions please send me.
Can you please mail me the latest syllabus of UTTAR PRADESH DRUG INSPECTOR entrance exam and UTTAR PRADESH FOOD INSPECTOR entrance exam with the eligibility criteria for Uttar Pradesh domicile candidates.
what is the disso medium for tropsiun chloride
generate a program to find the next date
What is the Difference Between 3M KCL and 4M KCL, WHy We are Filling 3M KCL In electrode Instead of 4M KCL
what is the principle of UV Vis spectroscopy, AAS, ICP OES,ICPAES, ICP-MS and FTIR
one time reffer ur books/(if ur technical students)
What is the product of the irrational roots of the equation (2x-1)(2x-3)(2x-5)(2x-7)=9?
plzzz..send me the pevious papers of drug inspector for uppsc....i.l b highly oblige
meron po bang minerals ang astoroids po ba?
Tell me do you hold active wa dental assistant registration?
Why did you want to become an astronomer?
