Physics Sound

Physics Sound
Q-1 What is wavelength of ultrasonic wave in air?
(a) 1/100m
(b) 1/200m
(c) 1/300m
(d) None
Q-2 A wave is represented by…….
(a) Y= (wt + b)
(b) y = w2t + t
(c) y = A Sin (Ct - d x + e)
(d) None
Q-3 Which of the following is a form of energy?
(a) Sound
(b) Sand
(c) A & B
(d) None
Q-4 Which of the following travel as a wave?
(a) Sound
(b) Sand
(c) Coal
(d) None
Q-5 Why we can’t hear the sound of explosion and moon?
(a) For sound wave we have medium
(b) Sound wave have energy
(c) A & b
(d) None
Q-6 At moon there in no………for propagation?
(a) Medium
(b) Oxygen
(c) Hydrogen
(d) None
Q-7 On the surface of moon, why astronaut cannot hear the sound of other
astronaut?
(a) Because of loch of medium
(b) Because of presence of medium
(c) a & b
(d) None
Q-8 Which quantity is not changed during transmission from are place to anata?
(a) Frequency
(b) Velocity
(c) Accleration
(d) None
Q-9 In air what is veloiry of sound?
(a) 335 m/sec
(b) 330m/sec
(c)235 m/sed
(d) None
Q-10 Verify of sound……if temperature of gas increases?
(a) Decrease
(b) Increase
(c) Remain Saul
(d) None
Q-11 Steel rod have…….velocity of sound?
(a) Minimum
(b) Maximum
(c) O
(d) None
Q-12 What is nature of light wave?
(a) Transverse
(b) Longitudinal
(c) Transverse & longitudinal
(d) None
Q-13 If pressure of a liguid increases what happen to velocity of sound?
(a) Decrease
(b) Increase
(c) A & b
(d) None
Q-14 sound waves are ----------------.
(a) Transverse in nature
(b) Longitudinal in nature
(c) a & b
(d) None
Q-15 V =?
(a) T
(b) T1/3
(C) T2
(d) ÖT
Q-16 In V= ÖT, T in
(a) Absolute Temp
(b) Tessa
(c) Tesla
(d) None
Q-17 If a person cannot hear then it is---------------.
(a) Infrasonic Wave
(b) Ultrasonic Wave
(c) Audible Wave
(d) None
Q-18 Which of the following is unit of frequency?
(a) H2
(b) N
(c) T
(d) None
Q-19 (Speed of a body /Speed of sound) =.
(A) Reynold No.
(b) Mach number
(c) Poisson ratio
(d) None
Q-20 In Iron velocity of sound will be ………
(a) Minimum
(b) Max
(c) O
(d) None
Q-21 Kund`t tube is used to detect ….
(a) Infrasonic wave
(b) Ultrasonic wave
(c) a & b
(d) None
Q-22 Stationary wave does not carry……..
(a) Energy
(b) Heat
(c) a & b
(d) None
Q-23 why we can’t polarize sound?
(a) Due to longitudinal nature
(b) Due to transverse nature
(c) Due to frequency
(d) None
Q-24 V in inverses proportional to
(a) Ö m
(b) m
(c) M2
(d) None
Q-25 V =Ö/?
(a) V2
(b) M
(c) M2
(d) None

Answers:-
1(a) 1/100m
2(c) y = A sin (C + -d ´ + e)
3(a) Sound
4(a) Sound
5(a) For sound wave we have medium
6(a) Medium
7 (a) Because of loch of medium
8 (a) Frequency
9 (b) 330m/sec
10(b) Increase
11(b) Maximum
12(a) Transverse
13(b) Increase
14 (a) Transverse in nature
15(d) ÖT
16(a) Absolute Temp
17(b) Ultrasonic Wave
18(a) H2
19(b) Mach number
20(b) Max
21(b) Ultrasonic wave
22(a) Energy
23(a) Due to longitudinal nature
24(a) Ö m
25(b) M

Physics for Engineering Entrance

About Nuclear Energy
Q-1 In ground state, what is mass of neutral C atom?
(a) <> 12u
(c) 12u (d) None
Q-2 Which of the following is used b) as a moderator in?
(a) H2O (b) D2O
(c) Ho (d) None
Q-3 In addition to D2O which is other substance used
as a moderator?
(a) Salt water (b) Simple water
(c)Graphite (d) None
Q-4 In nuclear reactor which fuel is used?
(a) C (b) P
(c) U (d) N
Q-5 Which type of force exist between N-N i.e
in Neutron - Neutron?
(a) Gravitational force (b) Nuclear force
(c) Strong Force (d) None
Q-6 In N- P which type of force exists?
(a) Nuclear force (b) Strong force
(c) A&B (d) None
Q-7 -------- is India’s------breeder test reactor?
(a) Dhruva, first (b) Dhruva, second
(c) Dhruva, third (d) None
Q-8 Why we use moderator in Nuclear reactor?
(a) To increase speed of neutron
(b) To slow down speed of neutron (c) A&B
(d) None
Q-9 Which type of rod is used in reactor to control
the reaction?
(a) Boron rod (b) Iron rod
(c) Al rod (d) None
Q-10 In nuclear reactor energy is produce due to?
(a) Nuclear fusion (b) Nuclear fission
(c) A&B (d) None
Q-11 In which state IGARC located?
(a) TN (b) HP
(c) Pb (d) J&K
Q-12 What is main duty of moderator in a reactor?
(a) To slow down neutron
(b) To accelerate neutron
(c) A&B
(d) None
Q-13 Who is behind the relation E= mc2 i.e.inter conversion
Of energy & mass?
(a) Einstein (b) Newton
(c) A&B (d) None
Q-14 Cd rod controls the ----- of reaction in nuclear
Reactor?
(a) Einstein (b) Speed
(c) Slowed (d) None
Q-15 --------is the fundamental particle?
(a) Proton (b) O2
(c) NL (d) None
Q-16 In sun what is source of energy?
(a) Nuclear fusion (b) Nuclear fission
(c) A&B (d) None
Q-17 1.66×10-27 1×g is value of
(a) 5a m u (b) 3 a m u
(c) 1a m u (d) None
Q-18 In order to measure pressure, which is used?
(a) Barometer (b) Lactometer
(c) Voltmeter (d) None
Q-19 Write number of proton in hydrogen?
(a) 2 (b) 1
(c) 9 (d) 6
Q-20 How many protons are there in oxygen?
(a) 6 (b) 8
(c) 9 (d) 10
Q-21 Write no. of proton for carbon?
(a) 7 (b) 6
(c) 9 (d) 8
Q-22 Atomic number of Na (Sodium) is?
(a) 12 (b) 11
(c) 13 (d) 18
Q-23 What is valency of carbon?
(a) 8 (b) 6
(c) 4 (d) 8
Q-24 What in symbol of boron?
(a) C (b) B
(c) BO (d) None
Q-25 Symbol of helium is?
(a) He (b) H
(c) Hi (d) None

ANSWERS:-
1 (c) 12u
2 (b) D2O
3 (c)Graphite
4 (c) U
5 (b) Nuclear force
6 (a) Nuclear force
7 (a) Dhruva, first
8 (b) To slow down speed of neutron
9 (a) Boron rod
10 (b) Nuclear fission
11 (a) TN
12 (a) To slow down neutron
13 (a) Einstein
14 (a) Einstein
15 (a) Proton
16 (a) Nuclear fusion
17 (c) 1a m u
18 (a) Barometer
19 (b) 1
20 (b) 8
21 (b) 6
22 (b) 11
23 (c) 4
24 (b) B
25 (a) He