TOP 100 Physics MCQS
All Questions for: TOP 100 Physics MCQS
Question 201: To measure the speed of an approaching car a police officer shines?
- A microwaves on it
- B light waves on it
- C ultra high frequency waves on it
- D radio waves on it
Explanation:
Question 202: Which one is the correct representation of the unit of pressure ?
- A Newton/Meter2
- B newton/meter2
- C Newton/meter2
- D newton/Meter2
Explanation:
Question 203: S.I unit of frequency is_________________?
- A Vibration S-2
- B Hertz
- C ms-1
- D Radian
Explanation:
Question 204: UV radiation can be produced by______________?
- A Electron excitation in the gas
- B Heating the filament
- C All the above
- D Ionization of atoms
Explanation:
Question 205: Magnetic flux and flux density are related by___________________?
- A flux density = magnetic flux area
- B magnetic flux = flux density / area
- C magnetic flux = flux density x area
- D flux density = magnetic flux x area
Explanation:
Question 206: Sterilization of surgical instruments medical supplies and bandages can be done by exposing them to a beam of_______________?
- A ?-rays
- B ?-rays
- C ?-rays
- D B and C have equal antiseptic propertie
Explanation:
Question 207: For which position maximum blood pressure in the body have the smallest value ?
- A Standing straight
- B Sitting on chair
- C Laying horizontally
- D Sitting on ground
Explanation:
Question 208: An example of scalar quantity is _________?
- A Speed
- B Acceleration
- C Velocity
- D Displacement
Explanation:
Question 209: The average acceleration caused by gravity per second is____________?
- A 22 feet
- B 32 feet
- C 52 feet
- D 42 feet
Explanation:
Question 210: An elevator weighing 3.5 x 10-6 N is raised to a height of 1000 m in the absence of friction, the work done is_________________?
- A 3.5 x 104 J
- B 3.5 x 10-3 J
- C 3.5 x 106 J
- D 3.5 x 109 J
Explanation:
Question 211: In simple cube one atom or molecule lies at its______________________?
- A Force corners
- B Six corners
- C Nine corners
- D Eight corners
Explanation:
Question 212: If the velocity-time graph gives a parabolic curve then body posses______?
- A Variable acceleration
- B All of these
- C Zero acceleration
- D Constant acceleration
Explanation:
Question 213: The phase of SHM describes________________?
- A Displacement only
- B The direction of motion only
- C Both displacement and direction of motion
- D Neither displacement nor direction of motion
Explanation:
Question 214: Coil of a galvanometer is suspended in a radial magnetic field so that the deflecting torque on the coil is always___________________?
- A BINA cosa
- B BINA
- C BINA sina
- D BINA tana
Explanation:
Question 215: The path of alpha particle is_______________?
- A Rectilinear
- B Curved
- C Elliptical
- D Zig-zag or erratic
Explanation:
Question 216: The net charge on n-type material is____________________?
- A Neutral
- B Negative
- C Both positive and negative
- D Positive
Explanation:
Question 217: In the transistor schematic symbol, the arrow_______________?
- A points form north to south
- B is locate on the collector
- C is located on the base
- D is located on the emitter
Explanation:
Question 218: By how many times are the Electrostatic forces stronger than the Gravitational Forces for a fixed distance?
- A None of these
- B 10
- C 10
- D 10
Explanation:
Question 219: Which of the following branch of Physics deals with the internal structure of earth?
- A Atomic physics
- B Plasma physics
- C Biophysics
- D Geophysics
Explanation:
Question 220: A wire obeys Hooks law is of length 11 when it is in equilibrium under a tension F1. Its length becomes 12 when the tension is increased to F2. The energy stored in the wire during this process is____________________?
- A (F1+F2) (121+122)
- B (F1+F2) (12-11)
- C (F1+F2) (12-11)
- D (F1+F2) (122-112)
Explanation:
Question 221: What is the self-inductance of a coil in which an induced emf of 2V is set up when the current changes at the rate of 4 As-1 ?
- A 8.0H
- B 0.5 mH
- C 0.5H
- D 2.0H
Explanation:
Question 222: Newton
- A Energy
- B Inertia
- C Work
- D Momentum
Explanation:
Question 223: In which quadrant the two rectangular components of a vector have same sign ?
- A 2nd
- B Both 1st and 3rd
- C 1st
- D 4th
Explanation:
Question 224: Two vectors are A = 3i^+2j^ -k^& B = 3i^-2j^ +k^ , then_____________?
- A B is anti-parallel to A
- B B is a negative vector of A
- C B has a negative magnitude
- D B is perpendicular to A
Explanation:
Question 225: The dimensions of the coefficient of viscosity are_____________?
- A M2L1T1
- B M2L-1T-1
- C ML-1T-1
- D ML1T-1
Explanation:
Question 226: A piece of copper and a piece of germanium are cooled from the room temperature down to 77 K.
- A The resistance of copper increases and that of germanium decreases
- B The resistance of each of them increases.
- C The resistance of copper decreases and that of germanium increases.
- D The resistance of each of them decreases.
Explanation:
Question 227: If the plane of the rectangular coil is parallel to the magnetic field (i.e radial magnetic field) the torque on the coil is_____________________?
- A ? = NIAB
- B ? = NIAB cos?
- C ? = NIAB sin?
- D ? = NIAB tan?
Explanation:
Question 228: If east, west, north, south, up and down are representing the direction of unit vectors, then east x south has the direction along_____________?
- A North
- B West
- C Down
- D Up
Explanation:
Question 229: The value of resistivity for insulator is of the order of____________?
- A 106 ohm metre
- B 108 ohm metre
- C 107 ohm metre
- D 105 ohm metre
Explanation:
Question 230: One light year is equal to________________?
- A 9.5x1015m
- B 9.5x1015Km
- C 9.5x1015cm
- D 9.5x1015sec
Explanation:
Question 231: Electrons_________________?
- A Can exist both inside and outside the nucleus
- B Can exist inside the nucleus
- C Cannot exist inside the nucleus
- D Do not know
Explanation:
Question 232: The cross product of two vectors is a negative vector when______________?
- A They are anti parallel vectors
- B They are parallel vectors
- C They are rotated through 270
- D They are a perpendicular vector
Explanation:
Question 233: Ground state energy of the 4th orbit in a H-atom is_____________?
- A 0.85 eV
- B 1.51 eV
- C 3.40 eV
- D 13.60 eV
Explanation:
Question 234: Power of a lens is one diopter if its focal length is
- A
- B 2 meter
- C 1 meter
- D
Explanation:
Question 235: Irregular flow of fluid is called_______________?
- A Uniform
- B Turbulent
- C Streamline
- D Laminar
Explanation:
Question 236: The characteristic X-rays spectrum is due to_____________?
- A The bombardment of the target by protons
- B The bombardment of target by electrons
- C The absorption of radiation by the target metal
- D The illumination of the target metal by ultra-violet radiation
Explanation:
Question 237: Steradian is the SI unit of________________?
- A Plane angle
- B Solid angle
- C Neither plane angle nor solid angle
- D Both plane angle and solid angle
Explanation:
Question 238: The first overtone of a stretched string of given length is 320 Hz. The first harmonic is_________?
- A 480 Hz
- B 320 Hz
- C 640 Hz
- D 160 Hz
Explanation:
Question 239: 1 Weber / m
- A 10? gauss
- B 3
- C 1/3
- D One gauss
Explanation:
Question 240: For the successful operation of Heat engine which condition should be met ?
- A operated at certain temperature difference
- B none of these
- C both A and B
- D cyclic process
Explanation:
Question 241: Boltzman constant K in terms of universal gas constant R and Avagadros number Na is give as_______________?
- A K = Na/Ra
- B K = nRNa
- C K = RNa
- D K = R/Na
Explanation:
Question 242: For a simple pendulu,m the restoring force is caused by________________?
- A Hand
- B Spring
- C All of these
- D Gravity
Explanation:
Question 243: To reduce the uncertainty in the timing experiment______________?
- A Highly precise instrument
- B Both a and C
- C Conduct at room temperature
- D Count number of vibration
Explanation:
Question 244: The specially designed semi-conductor diodes used as fast counters in electronic circuits are______________?
- A Photo voltaic cell
- B Solar cells.
- C The light emitting diodes
- D Photo diodes
Explanation:
Question 245: Geiger counter is suitable for _________________?
- A All situations
- B Extremely fast counting
- C Fast counting
- D Slow counting
Explanation:
Question 246: n instrument which can measure potential without drawing any current is_____________________?
- A ammeter
- B cathode ray oscilloscope (CRO)
- C galvanometer
Explanation:
Question 247: As the temperature of black body is raised the wavelength corresponding to maximum intensity________________?
- A shifts towards longer wavelength
- B remain the same
- C shifts towards longer as well as shorter wavelengths
- D shifts towards shorter wavelength
Explanation:
Question 248: The effective way to increase the sensitivity of a moving coil galvanometer is to___________________?
- A use a coil with very large number of turns
- B use a very strong magnetic field
- C use a very long and fine suspension
- D use a coil of very large area
Explanation:
Question 249: Which of the following is not derived quantity________?
- A Area
- B Volume
- C Density
- D Time
Explanation:
Question 250: SI unit of torque is______________?
- A joule
- B Neither a nor b is correct
- C N.m
- D Both a and b are correct
Explanation: