AAI ATC previous sampled questions from physics subject
For solutions and more questions @@ http://www.eqans.com/questions/
1. When a metal is heated it emits
predominantly
a. electrons
b. protons
c. positrons
d. neutrons
2. Thermonic emission was discovered
by
a. Thomas Edison
b. lee de forest
c. fleming
d. Rutherford
3. work function is generally
expressed in
a. electron volt
b. joule
c. newton
d. gauss
4. the saturation current in a diode
can be increased by
a. lower plate potential
b. raising plate potential
c. increasing cathode temperature
d. decreasing cathode temperature
5.The saturation current in diode
valve depends upon
a. plate voltage
b. temperature of the filament
c. neither a nor b
d. both a and b
6. in a halfwave rectifier the rms
valve of the a.c component of the wave is
a. greater than d.c value
b. less than d.c value
c. equal to d.c value
d. zero
7. when a charged particle moves in
a transverse magnetic field, it path of motion is
a. parabolic
b. circular
c. elliptical
d. linear
8. an electron moves with a constant
velocity V parallel to the direction of uniform magnetic field B. the force
experienced by the electron is
a. BeV
b. eV/B
c. B/eV
d. zero
9. An electron of mass M kg and
charge ‘e’ columbs travel from rest through a potential difference of V volts.
The field energy of electron in joule is
a. MeV
b. eV/M
c. eV
d. e/V
10. A charged particle moves through
a magnetic field perpendicular to it. The energy of the particle
a. increases
b. decreases
c. remains unchanged
d. first increase and then decreases
11. an electric or magnetic field
cannot accelerate
a. electrons
b. protons
c. neutrons
d. alpha particles
12. mass spectrograph determines
a. spectrum of light
b. charge of the ion
c. specific charge of the positive rays
d. specific charge of the cathode
rays
13. the dimensional representation of
plancks constant is same as that of
a. momentum
b. torque
c. gravitational constant
d. angular momentum
14. the potential energy associated with an electron in the orbit
a. increases with increase in radii of orbit
b. decreases with increase in radii
of orbit
c. remains unchanged with the change
in radii of the orbit
d. none of these
15. what is the SI unit of Young
modulus of elasticity
a. dyne/cm
b. newton/m
c. newton/m2
d. m2/s
16. one astronomical unit is the
average distance between
a. earth and sun
b. earth and the moon
c. Jupiter and the sun
d. Pluto and the sun
17. the most suitable unit for expressing nuclear radius is
a. micron
b. nanometer
c. Fermi
d. angstrom
18. which of the following is a vector quantity
a. momentum
b. pressure
c. energy
d. work
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AAI ATC general awareness questions
AAI ATC general awareness questions
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