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1. A physical quantity of the dimensions of, length that can be formed out of c, G and, , ae, eae is (c is velocity of light, G is universal, , constant of gravitation and e is charge}, , ." INEET 2017], ‘at [s =| bye? [g 27, c Amey Ane,, , ig 1 /_e*_ P ig, a |G 4ne, {d) Fe G asia, 2. If energy (E), velocity (v) and time (T) are, , chosen as the fundamental quantities, the, dimensional formula of surface tension, , will be [CBSE AIPMT 2015], (a) Ev*T~], , (b) (Ev'T~*], , (c) [Ev°T~), , (d) Ee wT 3, , 3. If dimensions of critical velocity v, of a, , liquid flowing through a tube are expressed, as [y‘p"r7], where », p and rare the, coefficient of viscosity of liquid, density of, liquid and radius of the tube respectively,, , then the values of x, y and z are given by, [CBSE AIPMT 2015], , (a) -1-1, (b)- 1-11, (c)-1-1-1, , (d) 1.4,, , 4, If force (F), velocity (v) and time (7') are, , taken as fundamental units, then the, dimensions of mass are [CBSE AIPMT 2014], (a) {FVT™) (by (Fut?) (¢) [Fv-'T~') (a) ([Fv-"T), , 5. In an experiment, four quantities a,b,c and, d are measured with percentage error 1%,, 296, 3% and 4% respectively. Quantity P is, , a’b?, calculated P = ~—>-%. Error in P If > 13), (a) 1496 (b) 10%, (c) 7% (0) 4%, 6. The dimensions of (9&9) are, [CBSE AIPMT 2012], cy (u?T-"?} en, (o) (LT caper?), , 7. The dimensions of ; £E*, where €p is, permittivity of free space and E is electric, , field, are [CBSE AIPMT 2010], (a) [IML-T~] (b) [M"T*], (c) (MT) (d) (MLT~"], , 8. If the dimensions of a physical quantity are, given by [M°L*T*}, then the physical, quantity will be [CBSE AIPMT 2009), , (a) pressure ifa=1,.b=-1c=-2, {b) velocity ifa=1b=Qc=-1, (c) acceleration ifa=1,b=1¢0=-2, (d) force fa=Ob=-1c=-2

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9 Which two of the following five physical, , Parameters have the same dimensions?, (i) Energy density [CBSE AIPMT 2008], (ii) Refractive index, , (iii) Dielectric constant, , (iv) Young's modulus, (v) Magnetic field, , (a) (ii) and {iv} (b) (iii) and (v), , (c) (i) and (ivy (d) (i) and (v), , 40. If the error in the measurement of radius of, a sphere is 2%, then the error in the, determination of volume of the sphere, will be (CBSE AIPMT 2008), (a) 4% (b) 6% {c) 8% (d) 2%, , 11. Dimensions of resistance in an electrical, circuit, in terms of dimension of mass M, of, length L, of time T and of current J, would, , ICBSE AIPMT 2007}, (a) [MT] (b) (MLET?], (c) [MT] (0) [MT-4y-7), , 12. The velocity v of a a at timet is, given by uv = ar + ae where a,b and ¢ are, +e, , constants. The dimensions of a,b andc are, respectively ICBSE AIPMT 2006], (a)(LT*}, (UY and (T] (by (L?), [7] ana [LT], )ILT?), (LT) end [L)— @) (L, (LT) and [1], , 13. The ratio of the dimensions of Planck’s, constant and that of the moment of inertia, , is the dimension of {CBSE AIPMT 2005}, (a) frequency (b) velocity, {c) angular momentum (c)} time, , 14. The dimensions of universal gravitational, , constant are (CBSE AlPMT 2004, 1992], (a) [M-'L'T*) (b) [ML*T-"], (c) [M"UT*) (a (MALTY, , 15. The unit of permittivity of free space, €, is, , (a) coulomb/newton-metre {CASE AIPMT 2004), (b) newton-metra” /coulomb?, , (&) coulomb? ‘newton - metre?, ~ {d) coulomb* /{newton -matre)®, 16. The value of Planck’s constant in SI unit is, (a) 663x 10" ss {CBSE AIPMT 2002], (b) 663 x 10 kg -m/s, (c) 663 x 10 kg-m?, (a) 663 x 10 J-s, , eet, , , , 17, Planck's constant has the dimensions of, , (a) linear momentum (CBSE A ee, (b) angular momentum MT aay +, (c) energy te, (cd) power j, , 18. A pair of physical quantities having pate zl, , dimensional formula is scgse AIPM., , (a) force and torque *, (b) work and energy aet, (c) force and impulse 3, , (d) linear momentum and angular Momentum, 19. The dimensional formula for magnetic, , flux is (CBSE AlpMT 1999), (a) [ML2T-24-") (0) [ML3T-*4*), (c) [ML 12a?) (d) [ML?T“"A2), , 20. The force F on a sphere of radius r moving, in a medium with velocity v is given by, F =6n nrv. The dimensions of Tare, {CBSE AIPMT 1997], fa) [ML] (b) (MLT*] (6) (MT) (a) [MET], , 21. Which of the following will have the, dimensions of time ? (CBSE AIPMT 1996), , & L c, , (a) LC (b) 7 (c) a (a) L, 22. The density of a cube is measured by, , measuring its mass and length of its sides,, , If the maximum error in the measurement, , of mass and length are 4% and 3%, , respectively, the maximum error in the, , measurement of density will be, , [CBSE AIPMT 1996}, (c) 1295 (d) 13%, , {a} 7% (b} 9%, , : 6, 23. tion i +258, An equation is given as (» v } y, where p = pressure, V = volume and, , 6 = absolute temperature. If aand b are, Constants, then dimensions of a will be, , (CBSE AIPMT 1996}, (a) (MET) (b) (M“1LET*), {c) (ML*T-") (d) (ML°T], , 24. The percentage errors in the measurement, of mass and speed are 2% and 3%, respectively. The error in kinetic energy, obtained by measuring mass and speed,, will be {CBSE AIPMT 1995], , (a) 12% = (bo) 10% = (c) 8% (d) 2%, , %5, , E, , ,, , , , ,, , ‘, 4

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25. Which one of the following statement is, false? (CBSE AIPMT 2010}, , (a) Pure Si doped with trivalent impurities gives a, p-type semiconductor, , {o) Majority carriers in a n-type semiconductor are, holes, , (c) Minority carriers in a p-type semiconductor are, electrons, , (d) The resistance of intrinsic semiconductor, decreases with increase of temperature,, , 26, The device that can act as a complete, electronic circuit is (CBSE AIPMT 2010}, {a) Junction diode, (b) Integrated circuit, {c) Junction transistor, (d) Zener diode, , 27, A common emitter amplifier has a voltage, . gain of 50, an input impedance of 100, and an output impedance of 200 Q. The, | power gain the amplifier is, . (CBSE AIPMT 2010, 2007}, (a) 500 (b) 1000 (c) 1250 (d) 50, , 28. To get an output Y = 1 from the circuit, , shown below, the input must be, {CBSE AIPMT 2010], , —>-f)—, , ———+4, , , , oon, , A B, fajO 14, (0 O, (c}1 0, (dj1 0, , 29. Sodium has body centred packing., Distance between two nearest atoms is 3.7, , A. The lattice parameter is, : [CBSE AIPMT 2009, 1999], , (oy4.3A ()30A (0) 86 A, erated in common-emilter, =2 volt such thata, change in the base current from 100 pA to, , 200 1A produces a change in the collector, , 2 cur 1, ‘ to 10 mA. he curren, is yg from 5 mA ; I ; ,, , (a) 75 (b) 100, {c) 150 (d) 50, , 31. The symbolic representation of four logic, gates, , o-m-00, , (a) 68A, , 30. A transistor is op, configuration at V,,, , , , , , wt )»—, ci) S——[)}—, iw S—_) >—, , The logic symbols for OR, NOT and NAND, , , , , , , , gales are respectively [CBSE AIPMT 2009}, (a) (iid), (iv), (il) (b) (ev), (i), (i), c) iv), (i), () (dd) (i). (ill), (iv), , 32. A p-n photodiode is fabricated from a, semiconductor with a band gap of 2.5 eV,, , It can detect a signal of wavelength, {CBSE AIPMT 2009), , (a) 6000 A (b) 4000 nm (c) 6000 nm (d) 4000, 33. The circuit is equivalent to, , , , , , , , , , [CBSE AIPMT 2008), NOR NAND NOT, (a) AND gate (b) NAND gate, {c} NOR gate (d) OR gate, , 34, A p-n photodiode is made of a material, with a band gap of 2.0 eV, The minimum, frequency of the radiation that can be, absorbed by the material is nearly, , ; (CBSE AIPMT 2008), (a) 10x 10'* Hz (b) 5 x 10" Hz, (c) 1x 10" Hz (d) 20 x 10" Hz, , 35. The voltage gain of an amplifier with 996, negative feedback is 10, The voltage gain, without feedback will be [CBSE AIPMT 2008], (a) 90 (b) 10 {c) 1.25 {d) 100, , 36. If the lattice parameter for a crystalline, structure is 3.6 A, then the atomic radius, in fcc crystals is [CBSE AIPMT 2008}, , (a) 181A (b)2.10A (cy292A (a) 127A, , 37. For a cubic crystal structure which one of, the following relations indicating the cell, characteristic is correct ? {CBSE AIPMT 20071, (a)4*b #cando #Bpandy #90”, ib)atbecandasf=y7=90", (c)la=b=candasepey= 9”, (d)a=b=canda=p=y=%"

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38. In the energy band diagram of a material, shown below, the open circles and filled, circles denote holes and electrons, , ively. The material is a/an, re {CBSE AIPMT 2007], , , , , , Eo, , , , Ey, , (a) p-type semiconductor (b) insulator, {c) metal (d) mtype semiconductor, 39. In the following circuit, the output Y for all, , possible inputs A and B is expressed by the, truth table [CBSE AIPMT 2007], , ;_), , , , Y, , @aBy OA BY, 000 001, 010 011, 100 101, 111 110, (JA BY @MABY, 001 000, 010 0 1,1, 100 101, 110 114, , 40. The following figure shows a logic gate, circuit with two inputs A and B and the, output C. The voltage waveforms of A, B, and C are as shown below, , , , A®@— Logic gate, Be— Circuit, , , , , , , , , , , , , , , , , , , , , , , , 41., , 43,, , R, , 45,, , ay, , The logic circuit gate is [CBSE Aipyyy, (a) AND gate (b) NAND gate “i, (c) NOR gate (d) OR gate, , A forward biased diode is [case AIPMT 2, -4V ~3v O06,, , (a) ———9——er—, , (oe) 6} —-wwyw-__5¥, , () tp} 2, , () S —»+—-ww-—%, , . A transistor is operated in common emitter, , configuration at constant collector Voltage, V, =15 V such that a change in the base, , current from 100 A to 150 HA produces g, change in the collector current from 5 m4, , to 10 mA. The current gain () is, {CBSE AIPM 2005, (a) 67 (b) 75 {c) 100 (d) 50, , A transistor-oscillator using a resonant, circuit with an inductor L (of negligible, resistance) and a capacitor C in series, produce oscillations of frequency f. If Lis, doubled and C is changed to 4 C, the, frequency will be [CBSE AIPMT 2006}, f f f, (a) 7 (b) &f (c) ae (d) 3, Copper has face-centered cubic (fcc) lattice, with interatomic spacing equal to 2.54 A., The value of lattice constant for this lattice, is [CBSE AIPMT 2005], (a)1.27A (6)5.08A (c)2.54A (ayasgA, , Choose only false statement from the, , following [CBSE AIPMT 2005], , (a) Substances with energy gap of the order of, 10 eV are insulators, , (b) The conductivity of a semiconductor increases, with increases in temperature, , (c) In conductors the valence and conduction, bands may overlap, , (d) The resistivity of a semiconductor increases, with increase in temperature, , Carbon, silicon and germanium atoms hav?, four valence electrons each. Their valence?, and conduction bands are separated by, energy band gaps represented by