MCAT/MCAT Physics Mcq Questions Nuclear Physics Sample Test,Sample questions

Question:
A mass spectrograph (spectrometer) sorts out

1.molecules

2.ions

3.elements

4.isotopes


Question:
A particle having the mass of an electron and the charge of a proton is called a

1.antiproton

2.positron

3.gamma rays

4.photon


Question:
According to which one of following law the density of atom is uniform?

1.J.J.Thomson model

2.Rutherfords model

3.Bohrs model

4.all of above laws contradict the statement


Question:
An ?-particle is emitted from 88Ra226. What is the mass and atomic number of the daughter nucleus?

1.224 - 84

2.220 - 80

3.222 - 86

4.226 - 87


Question:
An OP-AMP comparator is a circuit that compares the signal voltage on one of its inputs with a _

1.Non-inverting voltage at output

2.Reference voltage on the other

3.Virtual input

4.Output


Question:
An OP-AMPs can amplify

1.D.C.

2.A.C.

3.Both A.C. & D.C.

4.None of the above


Question:
Antimatter consists of

1.antiproton

2.antineutron

3.positron

4.all of above


Question:
Average energy required to remove one nucleon from the nucleus is called

1.binding energy per nucleon

2.energy of decay

3.destruction energy

4.all of above


Question:
Charge on an electron was determine by

1.Ampere

2.Maxwell

3.Millikan

4.Thomson


Question:
Charge on neutron is

1.plus 1.6 x 10-19C

2.zero

3.minus 1.6 x 10-19C

4.no definite charge


Question:
Diameter of an atom is approximately

1.10-12m

2.10-11m

3.10-10m

4.10-14m


Question:
During an encounter with an atom ?-particle knocks out

1.protons

2.electrons

3.neutrons

4.nothing


Question:
During fission process a large amount of

1.heat energy is released

2.nuclear energy is released

3.chemical energy is released

4.light energy is released


Question:
During fusion of hydrogen into helium

1.energy is absorbed

2.energy is released

3.mass is increased due to energy absorption

4.mass is reduced due to energy released


Question:
Electrons

1.can exist inside the nucleus

2.cannot exist inside the nucleus

3.can exist both inside and outside the nucleus

4.do not know


Question:
Energy liberated when one atom of U-235 undergoes fission reaction is

1.200MeV

2.40MeV

3.30MeV

4.20MeV


Question:
Fission chain reaction in a nuclear reactor can be controlled by introducing

1.iron rods

2.graphite rods

3.cadmium rods

4.platinum rods


Question:
For chain reaction to build up the size of the radioactive target should be

1.greater than the critical size

2.less than the critical size

3.equal to the critical size

4.all of above can build up a change reaction


Question:
Half life of radium is 1590 years. In how many years shall the earth loss all its radium due to radioactive decay?

1.1590x106 years

2.1590x1012 years

3.1590x1024 years

4.never


Question:
If one or more of the neutrons emitted during fission cab be used to build up further fission then the reaction is self sustained and is known as

1.fission reaction

2.fusion reaction

3.chain reaction

4.chemical reaction


Question:
In forward bias the width of potential barrier

1.Increases

2.Decreases

3.Remains same

4.No effect


Question:
In liquid metal fast breeder reactor the type of uranium used is

1.92U235

2.92U238

3.92U234

4.92U239


Question:
In nucleus of uranium the number of neutrons will be

1.92

2.235

3.143

4.different for different isotopes


Question:
Mass defect per nucleon is

1.binding energy of nucleus

2.packing fraction

3.average energy of nucleus

4.all of above are one and same thing


Question:
Mass of neutron is

1.1.67 x 10-31 kg

2.1.67 x 10-27 kg

3.9.1 x 10-31 kg

4.1.67 x 10-19 kg


Question:
Neutron and proton are commonly known as

1.nucleon

2.meson

3.boson

4.quartz


Question:
Non-inverting amplifier circuits have

1.A very high input impedance

2.A very low input impedance

3.A low output impedance

4.None of the above


Question:
Nuclear forces exist between

1.proton-proton

2.proton-neutron

3.neutron-neutron

4.all of the above


Question:
Nuclei having the same mass number but different atomic number are

1.Isotopes

2.Isobars

3.Isotones

4.Isomers


Question:
One amu is equal to

1.1.66 x 10-27kg

2.166 x 10-15ng

3.166 x 10-20?g

4.all of above


Question:
Pair production takes place in the vicinity of a heavy nucleus so that

1.net energy is conserved

2.net charge is conserved

3.net momentum is conserved

4.all of the above


Question:
Radioactive decay obeys which one of the following law?

1.N=N?e-?t

2.N=N?e?t

3.N=N?e-?t/2

4.N?=N(1+e?t)


Question:
Radioactive materials can be identified by measuring their

1.hardness

2.density

3.mass

4.half life


Question:
Radioactivity is a ______ (A) Spontaneous activity (B) Chemical property

1.A & B

2.B & C

3.C & A

4.A B & C


Question:
Sterilization of surgical instruments medical supplies and bandages can be done by exposing them to a beam of

1.?-rays

2.?-rays

3.?-rays

4.b and c have equal antiseptic properties


Question:
Sum of the masses of constituent nucleons as compared to the mass of the resultant nucleus is

1.smaller

2.greater than 82

3.same

4.some times smaller some times greater


Question:
The bombardment of nitrogen with ?-particles will produce

1.neutron

2.Proton

3.electron

4.positron


Question:
The electronic circuits which implement the various logic operations are called

1.Logic gates

2.Boolean algebra

3.Amplifier gain

4.Logic functions


Question:
The operation of a transistor requires

1.That the emitter be heated

2.That the base be heated

3.That the collector be heated

4.None of the above


Question:
The path of ?-particle is

1.rectilinear

2.curved

3.zig-zag or erratic

4.elliptical


Question:
The unit of radioactivity curie is equal to

1.3.74 x 109 disintegration per sec

2.3.70 x 1010 disintegration per sec

3.3.55 x 1010 disintegration per sec

4.3.60 x 1010 disintegration per sec


Question:
The working of transistor as amplifier is similar to

1.Step up transformer

2.Step down transformer

3.Three diodes in common

4.Triode vacuum tube


Question:
Tick the correct statement

1.moderators slow down the neutrons

2.moderators bring the neutrons to rest

3.moderators absorb the neutrons

4.moderators reflect the neutrons


Question:
To obtain a p-type semi-conductor Si Crystal must be doped with foreign atoms whose valency is

1.2

2.3

3.4

4.5


Question:
To obtain an n-type semiconductor germanium crystal it must be doped with foreign atoms whose valency is

1.2

2.3

3.4

4.5


Question:
Transuranic elements have atomic number

1.greater than 72

2.greater than 82

3.greater than 92

4.greater than 102


Question:
Various types of cancer are treated by

1.cobalt-60

2.strontium-90

3.carbon-14

4.nickel-63


Question:
Which of the following radiations are suitable for the treatment of an infection in the interior of the body ?

1.?-rays

2.?-rays

3.?-rays

4.X-rays


Question:
Which one of the following radiation possesses maximum penetrating power?

1.?-rays

2.?-rays

3.?-rays

4.all have equal penetrating power


Question:
Which one of the following radiations possesses maximum velocity?

1.?-rays

2.?-rays

3.?-rays

4.all of above have same speed


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