Past papers solved mcqs
Correct the wrong ones,Paper 2000 __1
8.* Write* only* the* correct* answers* in* the* answer* book.* Do* not* reproduce* the* questions.
1)* If* the* speed* of* particle* is* doubled* then* its* kinetic* energy* becomes
(a)* Doubled.
(b)* Unchanged
(C)* FOUR TIME
(d)* Half* of* the* initial* value

2)* A* ping* -* pong* ball* of* mass* m moving* with* velocity* v* bounces* off* a* concrete* surface* with* the* same* speed* in the* opposite* direction.* The* change* in* it’s* linear* momentum* is
(a)* 2mw
(B)* MV
1/2mv
(d)* Zero

3)* The* work* done* by* a* force* of* 20* N* in* displacing* an* object* through* a* distance* of* 5* cm is
(a)* 100* J
(b)* 4* J
(c)* 400* J
(D)* 1* J

4)* The* weight* of* an* astronaut* in* space* far* from any* planet* in
(A)* ZERO
(b)* Different* than* on* earth
(c)* Same* on* earth

5)* A* net* force* needed* to* give* a* mass* of* 250* kg* an* acceleration* of* 5* cm/sec2* is
(a)* 25N
(B)* 12.5N
(c)* 10N
(d)* 5N

6)* A* light* year* is* a* unit* of
(a)* Time
(B)* DISTANCE
(c)* Velocity
(d)* Intensity* of* light

7)* A* spaceship* is* circling* a* planet* at* a* distance* of* 10000* km* from* its* center.* Assume* that* the* radius* of* the planet* is* 5000* km mid* the* acceleration* clue* to* gravity* on* it’s* surface* is* 10* rn/sec2.* The* speed* of* the spaceship* is
(a)* 5* km/sec
(b)* 1* km/sec
(c)* 10km/sec
(d)* 25* km/sec

8)* A* uniform* spring* with* force* constant* K* is* cut* into* halves.* Whet* is* the* spring* constant* for* one* of* the halves?
(a)* Half* of* the* original* one.
(B)*twice the original one
(c)* 1/4* of* original* one
(d)* Same* original* one

9)* A* watt* is* the* unit* of
(a)* Energy
(B)* POWER
(c)* Work
(d)* Capacity

10)* Two* bodies* are* in* thermal* equilibrium* with* each* other* if* they* have* same
(a)* Pressure
(b)* Density
(c)* Energy
(D)* TEMPERATURE

11)* The* number* of* grams* in* one* mole* of* Helium gas* are
(a)* 1gm/mole
(B)* 4GM/MOLE
(c)* 6* gm/mole
(d)* 2* gm/mole

12)* A* gas* consists* of* a* mixture* of* He* and* N2* molecules* The* speed* of* He* molecules* Intl.* mixture* is
(A)*SLOWER THAN N2
(b)* Greeter* than* N2* molecules
(c)* equal* to* N2* molecule.

13)* If* a* gas* is* compressed* constant* temperature,* then* the* mean* free* path* of* the* molecules* of* the* gas,
(a)* decreases
(B)* REMAIN THE SAME
(c)* increases

14)* The* melting* point* of* the* element* Sulfur* is* 113* °C.* It’s* temperature* at* Fahrenheit* scale* is
(a)* 45* °F
(b)* 113* °F
(c)* 63* °F
(d)* 8l* °F

15)* Diffraction* of* waves* occurs* because* of
(a)* medium change
(b)* UNCERTAINITY PRINCIPLE(not sure if wrong correct it)
(c)* geometry* of* the* object* obstructing* the* wave
(d)* none* of* these

16)* Beats* in* sound* are* a* result* of
(a)* two* sound* waves* with* different* speeds
(b)* in-homogenous* medium
(C)* SUPERposition* of* two* waves* with* different* frequencies
(d)* the* relative* motion* of* one* of* the* sound* source.

17)* Light* of* certain* colour* is* composed* of* train* of* waves,* each* 0.250* m* long.* The* number* of* waves* in* 1* meter distance* are
(a)* 2500000
(b)* 5000000
(c)* 4000000
(D)* 250

18)* Longitudinal* waves* do* not* exhibit
(a)* refraction
(b)* reflection
(c)* diffraction
(d)* POLARIZATION

19)* If* mass* of* a* simple* pendulum is* doubled,* it’s* period
(A)* REMAIN UNCHANGED ( IN CASE OF LENGTH IT MATTERS)
(b)* doubled
(c)* becomes* half* of* the* original
(d)* None* of* these

20)* Diagnostic* ultrasound* of* frequency* 4.50* MHz* is* used* to* examine* tumors* in* soft* tissue.* If* the* speed* of sound* in* tissue* is* 1500* m/sec.* The* wave* length* of* this* wave* in* tissue* is
(a)* 6750* mm
(b)* 4.50* mm
(c)* 1500* mm
(d)* 333.3 mm

PAPER_______________2
*(1)* The* neutrino* does* not* possess
(A)* CHARGE
(b)* linear* momentum
(c)* angular* momentum
(d)* energy

(2)* The* particle* whose* properties* are* most* nearly* the* same* as* those* of* the* proton* is* the
(a)* positron
(B)* NEUTRON
(c)* antiproton
(d)* positive* ion
(e)* none* of* these

(3)* The* element* whose* nuclei* contain* the* most* tightly* bound*nuclei * is
(a)* helium
(b)* carbon
(c)* IRON (only in these four , nickel has the most bounded nuclei
(d)* uranium
(e)* none of these

(4) As a sample of a radioactive nuclide decays, its half—life
(a) decreases
(B) REMAINS THE SAME
(c) increases
(d) any of the above, depending on the nuclide

(5) Current in an n-type semiconductor is carried by
(A) ELECTRONS
(b) holes
(c) positive ions
(d) electrolytes
(e) none of these

(6) Pauli’s exclusion principle states that no two electrons in an atom can
(a) be present in the same probability cloud
(b) have the same spin
(C) HAVE THE SAME QUANTUM NUMBER
(d) interact with each other
(e) none of these

(7) The number of possible orientations of an atomic electron in a magnetic field is
(a) 1
(B) 2
(c) 4
(d) 2p
(e) none of these

8) A hydrogen atom is in its ground state when its orbital electron
(a) is within the nucleus
(b) has escaped from the atom
(C) IS IN ITS LOWEST ENERGY LEVEL
(d) is stationary
(e) none of these

(9) Electromagnetic waves transport
(a) wavelength
(b) frequency
(c) charge
(D) ENERGY
(e) all of these

(10) The reactance of a capacitor is proportional to
(a) Ö f
(b) f
(c) f2
(D) 1/f
(e) none of these

(11) The capacitive reactance of a 5-m F capacitor in a 20-kHz circuit is
(a) 0.63W
(B) 1.6W
(c) 5W
(d) 16W
(e) none of these

(12) The impedance of a circuit does not depend on
(a) I
(b) f
(C) R
d) C
(e) all of these

(13) At resonance, itis not true that
(a) R=Z
(b) XL=1/XC
(C) P=IV
(d) I=V/R

(14) A voltmeter across an AC circuit reads 50 V and an ammeter in series with the circuit reads 5 A. The power consumption of the circuit
(a) is less than or equal to 250 W
(B) is exactly equal to 250 W
(c) is equal to or more than 250 W
(d) may be less than, equal to, or more than 250 W
(e) none of these

(15) The magnetic flux through a wire loop in a magnetic field B does not depend on
(a) the area of the loop
(b) SHAPE OF THE LOOP
(c) the angle between the plane of the loop and the direction of B
(d) the magnitude B of the field
(e) none of these

(16 The alternating current in the secondary coil of a transformer is induced by
(A) A varying electric field
(B) A VARYING MAGNETIC FIELD
(c) the iron core of the transformer
(d) motion of the primary coil
(e) none of these

(17) When a diamagnetic substance is inserted in a current carrying solenoid, the magnetic field is
(a) SLIGHTLY DECREASED
b) greatly decreased
(c) slightly increased
(d) greatly increased
(e) none of these

(18) The N-type semiconductor is electrically
(a) negative
(b) positive
(c) NEUTRAL
(d) charged

(19) When a 100¾ W, 240-V light bulb is operated at 200 V, the current that flows in it is
(a) 0.35 A
(b) 0.42 A
(c) 0.50 A
(d) 0.58 A
(e) none of these

(20) The a of a transistor is
(a) current gain in common base
(b) current gain in common emitter
(C) voltage gain in common emitter
(d) voltage gain in common base
(e) none of these __________________



I'll post solved mcqs of other past papers soon. Mark them too.

Let me give solutions to the paper-1 MCQs(First 10), so as to have a deep understanding of the related topics.

Note: I am not going to attempt paper-2 by the end of Ramadan in order to be consistent with the pace; although I have great experience of handling Electromagnetic theory and Solid State Physics - as I chose the advanced courses related to aforementioned portions as electives during my Engineering.

One suggestion: Why not just focus on paper-1s of every year for now? (Just a suggestion, not a compulsion)

Anyway, below are the solutions of first 10 MCQs of paper-1. Next 10, I shall share tomorrow.

Yes you are right . Solving second paper disturbed my pace. However first 10 mcqs of next paper are here. As i have also prepared the first half paper. And thanks for giving time to my effort.




2001 PAPER������������1

1. The vector in space has:
A . Three components
b Two components
c. One component
d. None of these


2. The correct relation is:
A. a . b = b . a
b a . b ≠ b . a
c. a × b = b × a
d. a . b = b × a

3. N.s./m^2 is the SI unit of:
a. Surface tension
B. Viscosity
c. Force
d. Momentum e
. None of these

4. Antinodes are points where:
a. Strain is maximum
b. Frequency is maximum
c. Wave length is maximum
D. Amplitude is maximum
e. None of these


5. When the mass and speed of a body are doubled, the momentum becomes:
a. 16 times
b. 8 times
c. 4 times
d. 3 times
e. None of these


6. Efficiency of carnot engine is 100% when temperature of sink is: Carnot engine isnt actually 100% efficient, its just the best possible efficiency (which is why it says 100%) between two heat
a. Zero reservoirs
b. Infinite
c. Equal to source
D. None of these


7. For gases obeying Boyle’s Law, if pressure is doubled, volume becomes:
a. Double
B. One half
c. Three times
d. No change


8. Distance between an antinodes and an adjacent node is:
a. λ
b. 2
c. λ/2
D. λ/4


9. Total energy of a particle performing S.H.M. is directly proportional to:
. The amplitude
b. The square root of amplitude
C. The square of amplitude
d. The reciprocal of amplitude
e. None of these 1


0. Frequencies less than 20 Hz are called:
a. Supersonics
b. Ultrasonics
C. Infrasonics
d. None of these