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Physics GRE Subject Practice Test MCQs 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
(c) 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 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) the 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

GRE Biology Practice Test Solved MCQs Questions Answers

(1) Life originated during:
(a) Pre-cambrian period
(b) Mesozoic era
(c) Coenozoic era.
(d) Proterozoic era
(e) None of these

(a) Pre-cambrian period

(2) Pancreas secrete:
(a) Pepsin
(b) Only hormones
(c) Only enzymes
(d) Both (a) and (b)
(e) None of these

(e) None of these

(3) Louis Pasture is known for:
(a) Germ theory of disease
(b) Germ plasm theory
(c) Mutation theory
(d) Cell theory
(e) None of these

(a) Germ theory of disease

(4) Life originated:
(a) In air
(b) On land
(c) In water
(d) In all (a), (b) and (c)
(e) None of these

(c) In water

(5) Virus are:
(a) Unicellular
(b) Acellular
(c) Multicellular
(d) Free living
(e) None of these

(e) None of these

(6) Wings of insects and bats are examples of:
(a) Homologous organs
(b) Analogous organs
(c) Both (a) and (b)
(d) Vestigial organs
(e) None of these

(b) Analogous organs

(7) Archeopteryx is a connecting link between:
(a) Amphibians and reptiles
(b) Reptiles and birds
(c) Birds and mammals
(d) Amphibians and birds
(e) None of these

(b) Reptiles and birds

(8) Lamarck’s theory of Evolution is based upon:
(a) Effect of environment
(b) Use and disuse of body parts
(c) Inheritance of Acquired characters
(d) All of these
(e) None of these

(d) All of these

(9) Absorption of digested food occurs mainly in:
(a) Colon
(b) Small intestine
(c) Large intestine
(d) Stomach
(e) None of these

(b) Small intestine

(10) A renal portal system is found in:
(a) Man
(b) Horse
(c) Rabbit
(d) Frog
(e) None of these

(d) Frog

(xi) In a dihybrid cross, the ratio of F2 generation is:
(a) 9:3:3:1
(b) 3:1
(c) 1:2:1
(d) 1:1
(e) None of these

(xii) When a single gene has multiple effects, the phenomenon is called:
(a) Codominance
(b) Epistasis
(c) Pleiotropy
(d) Genostasis
(e) None of these

(xiii) Lamarck’s theory of evolution was published in:
(a) 1807
(b) 1808
(c) 1809
(d) 1810
(e) None of these

(xiv) The book “Origin of Species” was written by:
(a) Linnaeus
(b) Lamarck
(c) Mendel
(d) Darwin
(e) None of these

(xv) The interaction between algae and fungi to form lichen is called:
(a) Parasitism
(b) Mutalism
(c) Commensalism
(d) Amensalism
(e) None of these

(xvi) The actual location or place where an organism lives is called:
(a) Habitat
(b) Ecosystem
(c) Niche
(d) Biome
(e) None of these

(xvii) Which of the biomes has been increased in area by human activities?
(a) Savanna
(b) Grassland
(c) Desert
(d) Coniferous forest
(e) None of these

(xviii) Which zone of the lake ecosystem consists of phyto-and zoo-planktons?
(a) Littoral zone
(b) Limnetic zone
(c) Profundal zone
(d) Water deep layers
(e) None of these

(xix) Which of the following is a biotic component of an ecosystem?
(a) Producers
(b) Consumers
(c) Decomposers
(d) All of these
(e) None of these

(xx) A sequence of changes in the community structure of an ecosystem over a period of time is called:
(a) Natural selection
(b) Succession
(c) Neo-Darwinism
(d) Lamarckism
(e) None of thes

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