Physics Multiple Choice Questions Answers

Physics Quiz Questions Answers

1. Which of the following deals with the properties of matter and energy and their mutual relationship?
a. Chemistry
b. Astronomy
c. Physics
d. None of these

2. The mass of electron is:
a. 1.9 x 10-31 Kg
b. 9.1 I x 10-28 g
c. Equal to proton
d. None of these

3. The radius of hydrogen atom is:
a. 5.3 x 10 – 10 m
b. .53 x 10-10 m
c. .053 x 10-10 m
d. None of these

4. The radioactive substance whose half life is 7 days, decays completely in:
a. 14 days
b. 21 days
c. 28 days
d. None of these

5. The spiltting of spectral lines of an element when it radiates is a magnetic field is known as:
a. Induced emission
b. Zeaman effect
c. Population inverse
d. None of these

6. Normally the emitter of a transistor is:
a. Reverse biased
b. Forward biased
c. Not biased
d. None of these

7. Fission chain reaction is controlled by introducing rods of:
a. Graphite
b. Cadmium
c. Boron
d. None of these

8. The first atomic reactor was introduced by:
a. Curie
b. Wilson
c. Rutherford
d. None of these

9. Gamma rays waves like:
a. Sound waves
b. Beta waves
c. X-rays
d. None of these

10. The path Beta particle is:
a. Straight
b. Circular
c. Zig-zag
d. None of these

11. Which one is most penetrating?
a. β-rays
b. X-rays
c. γ-rays
d. None of these

12. A forward biased diode has resistance:
a. Zero
b. Infinite
c. Equal to reverse biased one
d. None of these

13. The reverse current through a semiconductor is due to:
a. Majority carriers
b. Electrons
c. Minority carriers
d. None of these

14. The energy of radio waves is greater than:
a. Light
b. Microwaves
c. X-rays
d. None of these

15. Thermal neutrons are:
a. At high temperature
b. Fast moving
c. Slow moving
d. None of these

16. In Somatic radiation damage there is:
a. Loss of hearing
b. Loss of hearing loss of hair
c. Ultraviolet beams
d. None of these

17. Laser beam consists of:
a. Monochromatic light
b. White light
c. Ultraviolet light
d. None of these

18. Which one is independent of frequency:
a. Impedance
b. Reactance
c. Resistance
d. None of these

19. N-type material is electronically:
a. Negative
b. Positive
c. Neutral
d. None of these

20. The alternating current in the Secondary coil of a transformer is induced by:
a. A varying electric field
b. A varying magnetic field
c. dc in the primary coil
d. None of these

Multiple Choice Questions with Answers of Physics Practice Online Admission Entry Tests

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

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

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) uncertainty principle
(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.

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
(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