MUET Physics 2012

MUET 2012 Physics

• Roentgen is the unit of X-ray.
• The scalar product AB = AB when the angle between A and B is 0°.
• When a fast-moving train suddenly stops, passengers sitting inside move from their seats due to inertia.
• Torque is calculated when angular momentum changes from 150 J.s to 15 J.s in 5 seconds. The torque is 27 N.m
• The S.I. unit of velocity is m/s.
• The magnitude of velocity is constant in uniform circular motion.
• Force per unit charge due to an electric field is called electric field intensity.
• The formula for Compton's shift is Δλ = h/MoC (1-cosθ).
• The S.I. unit of pressure is Pascal (Pa) or N/m².
• The value of 'g' (acceleration due to gravity) is less at the equator.
• An N-type semiconductor is formed by N-doping.
• According to the work-energy principle, Wnet = ΔK.E.
• In longitudinal waves of air, the region where pressure is low is called rarefaction.
• For a galvanometer with a resistance of 250 ohms having full-scale deflection for a current of 10mA, to change it into a voltmeter of range 100 volts by connecting a resistor R in series, the resistance R in ohms is 9750 ohms.
• Spectral lines of the Paschen series of the hydrogen spectrum lie in the infrared region.
• Spectral lines of the Pfund series lie in the infrared region.
• The radius (r) of a circular orbit of a charge (q) in a magnetic field (B) is given by r = mv/qB.

Mathematics

• Cosθ = 1 when θ is 0°.
• d/dx (Cos²x) is -2sinx*cosx.
• If y = x³ + 3x² + 2, then y'' is 6x+6.
• The 9th term of (1 + x)^n is 1 + 9x + 9(n-1)/2.
• If A = {1, 2, 3}, B = {3, 4, 5}, and X = {6, 7}, then A ∩ B ≠ ∅ is true.
• If 2^n = 4^m and 1^m = 8^n, then find (n) in term of (w) is w-1
• The formula for the area of a triangle is Δ = √(s(s-a)(s-b)(s-c)), where s is the semi-perimeter.
• If x² = 4ay, then the length of the latus rectum will be 4a.
• If f(x) = x² + x, then f(d+1) = d² + 3d + 2.
• If f(x) = x^(n-1), then f(i) will be (1-i).
• For a sequence, if Tn = n(n-1)/2, then the sequence is 0, 1, 3.
• Sin(2π + θ) = Sinθ.
• Tan 60° = √3.
• When lines represented by ax² + 2hxy + by² = 0 are coincident, then h² = ab.
• The point (6, 9) lies outside the circle x² + y² = 100.
• If the points (1,2), (2,3), and (5a,6) are parallel, then a = ±3.

Chemistry

• Sodium is prepared by Down's method.
• In a period, ionization energy increases while moving from left to right.
• If Kc = [products]/[reactants], then the order of reaction is one.
• In the 4th shell, bond length will be like (no option).
• Alkane preparation by reacting alkyl halide with Na metal is called the Wurtz reaction.
• Protium is what 'H' is called.
• The formula of alkyne is CnH2n-2.
• If the molecular mass is 180 and the empirical formula is CH₂O, then the molecular formula will be C6H12O6.
• Complete concentration of a substance is measured by molarity.
• Complex carbohydrates used for body growth are called Protein.
• As temperature increases, volume increases at constant pressure.
• Sugars which cannot be broken down into other sugars are called Polysaccharides.
• Sodium metal reacting with alkyl halide forms Grignard reagent.
• Sulfuric acid is diprotic.
• Benzene is not a gas.

English

• "The Hostile Witness" is a Detective Story.
• The case was about a Silver Cigarette box.
• The lesson "My Bank Account" is a Comedy.
• Adultery means Affair.
• The correct punctuation mark for "oh dear" is an exclamation point (!).
• "Lessen" means Shrink.