TOP 100 Physics MCQS
All Questions for: TOP 100 Physics MCQS
Question 501: Radiation produced from TV picture tube is_____________?
- A B-rays
- B Far infrared
- C Infrared
- D X-rays
Explanation:
Question 502: Nuclei having the same mass number but different atomic number are____________?
- A Isotones
- B Isobars
- C Isomers
- D Isotopes
Explanation:
Question 503: Normal human body temperature 98.6
- A 37
- B 55
- C 42
- D 410
Explanation:
Question 504: The blood flow is _______________ flow at systolic pressure?
- A Turbulent
- B Laminar
- C None
- D Mixed
Explanation:
Question 505: The uncertainty in momentum & position is due to its_____________?
- A Emission of the certain wavelength
- B Property of matter and radiation
- C Very high velocity
- D Two-dimensional motion
Explanation:
Question 506: Terminal velocity of the body is directly proportional to the_______________?
- A The radius of the body
- B The diameter of the body
- C Square of the diameter of the body
- D Size of the body
Explanation:
Question 507: Why gamma rays are used to kill bacteria to sterilize surgical equipment etc ?
- A All of above
- B Highly penetrating
- C Massless
- D Chargeless
Explanation:
Question 508: Simple harmonic motion is a type of________________?
- A Circular motion
- B Vibratory motion
- C Rotational motion
- D Musical arrangement
Explanation:
Question 509: When we excite some atoms by heat collision or electrical discharge they will________________?
- A emit either invisible or visible light
- B absorb particular wavelengths when white light is incident on them
- C radiate electromagnetic energy of discrete characteristic wavelength
- D radiate electromagnetic energy with a continuous distribution of wavelength
Explanation:
Question 510: A galvanometer basically is an instrument used to ____________________?
- A measure current flowing through a circuit
- B measure voltage across a circuit
- C measure potential difference between two points in a circuit
- D detect current in a circuit
Explanation:
Question 511: Errors in the transmission of power through optic fiber can be minimized by using a______________?
- A Single mode step index fiber
- B Graded index fiber
- C Multimode index fiber
- D Copper wire
Explanation:
Question 512: When an electron moving with a uniform speed in a vacuum enters a magnetic field in a direction perpendicular to the field the subsequent path of the electron is ___________________?
- A a straight line parallel to the field
- B a parabola in a plane perpendicular to the field
- C a circle in a plane perpendicular to the field
- D a straight line along its initial direction
Explanation:
Question 513: In laser production the state in which more atoms are in the upper state than in the lower one is called_____________?
- A Metal stable state
- B All the above
- C Inverted population
- D Normal state
Explanation:
Question 514: The mass attached to a spring executes ?
- A Vibratory motion
- B Both A and C
- C S.H.M
- D Rotatory motion
Explanation:
Question 515: Select an alternative from of uncertainly principle from the following_______________?
- A ?E = h/m?c(1-cos?)
- B Any of above
- C mc2 = hv
- D ?E . ?t = h
Explanation:
Question 516: Which of the following is path funtion?
- A Enthalpy
- B Internal energy
- C Entropy
- D work and heat
Explanation:
Question 517: What is the force of attraction between any two bodies by virtue of their masses is called?
- A Nuclear Force
- B Centripetal Force
- C Gravitational Force
- D Electromagnetic Force
Explanation:
Question 518: The drag force is given by_________________?
- A Pascals law
- B Stokes law
- C Newtons law
- D Gauss law
Explanation:
Question 519: Reverse process of photoelectric effect is_______________?
- A pair production
- B annihilation of matter
- C X-rays production
- D Compton effect
Explanation:
Question 520: A voltage V = V0 cos ?t is applied across a resistor of resistance R the average power dissipated per cycle in the resistor is given by___________?
- A V?/?2R
- B V/?2?R
- C 2/?2?R
- D V02/?2R
Explanation:
Question 521: The magnetic field strength of solenoid is__________________?
- A Both B and C
- B B = ?NI
- C B = ?nI
- D B = ?N/I
Explanation:
Question 522: A mass spectrograph (spectrometer) sorts out____________?
- A Elements
- B Molecules
- C Ions
- D Isotopes
Explanation:
Question 523: If the volume of a gas is held constant and we increase its temperature then_______________?
- A its pressure falls
- B its pressure rises
- C any of above
- D its pressure is constant
Explanation:
Question 524: The restoring force acting on the simple pendulum is given by_______________?
- A mg cos ?
- B mg sin ?
- C mg cos ?
- D mg sin ?
Explanation:
Question 525: The angular speed of seconds hand of a watch in rads-1 is______________?
- A ?/2
- B ?/30
- C ?
- D ?/180
Explanation:
Question 526: Which one is venturi relation ?
- A A1 V1 = A2 V2 = constant
- B P1
- C P = 1 /2?V2 = ?gh = constant
- D V2 = 2g (h1-h2)
Explanation:
Question 527: An ammeter measures the total current flowing through a circuit when it is connected__________________?
- A in series with the circuit
- B in series with any of the parallel resistances in the circuit
- C in parallel with circuit
- D in parallel with any of the series resistances in the circuit
Explanation:
Question 528: A Stone thrown from the top of a tall building follows a path that is:
- A Hyperbolic
- B Circular
- C Parabolic
- D Made of two straight line segments
Explanation:
Question 529: Depletion region of a junction is formed_____________?
- A under forward bias
- B when temperature varies
- C during the manufacturing process
- D under reverse bias
Explanation:
Question 530: Angle between the rectangular components of a vector is________?
- A Zero
- B 30
- C 45
- D 90
Explanation:
Question 531: The centripetal acceleration produced in a rotating body is commonly due to change on_________of body?
- A None of these
- B both
- C magnitude
- D direction
Explanation:
Question 532: Which one is not correct for a vector A= 2i+2j+3k ?
- A Has direction 45
- B Has magnitude 2 and direction
- C Has magnitude 2
- D Has magnitude -2
Explanation:
Question 533: The frequency of a circuit consisting of a capacitance C and a resistor R is________________?
- A 1/ 2RC
- B C/R
- C 1/RC
- D R/C
Explanation:
Question 534: Frequency is the inverse of __________?
- A Velocity
- B Stress
- C Time Period
- D Gravity
Explanation:
Question 535: Alpha particle ionizes an atom_________________?
- A All of above
- B Through direct collision
- C Through electrostatic repulsion
- D Through electrostatic attraction
Explanation:
Question 536: A point where the incident parallel rays of light converge or appear to diverge after passing through a lens is called______________?
- A aperture
- B center of curvature
- C optical center
- D focus
Explanation:
Question 537: Mass defect per nucleon is ___________________?
- A Packing fraction
- B All of above are one and the same thing
- C The average energy of the nucleus
- D The binding energy of the nucleus
Explanation:
Question 538: One AMU is equal to__________________?
- A 166 x 10-15ng
- B All of above
- C 166 x 10-20g
- D 1.66 x 10-27kg
Explanation:
Question 539: Cos?i^ + Sin?j^ is a_________________?
- A Position Vector
- B The unit vector in the direction at angle ? with an x-axis
- C Vector
- D Vector in the direction at angle ? with an x-axis
Explanation:
Question 540: In damped harmonic oscillation which one decreases ?
- A Energy of vibration
- B Neither amplitude nor energy
- C Both amplitude and energy
- D Amplitude of vibration
Explanation:
Question 541: The scales of temperature are based on two fixed points which are_________________?
- A The temperatures of ice cold and boiling water
- B The temperature of melting ice and boiling water at atmospheric pressure
- C The temperatures of water at 0? 100?C
- D The temperatures of frozen and boiling mercury
Explanation:
Question 542: The pressure exerted by a column of mercury 76cm high and at 0
- A 1 Pascal
- B 1 atmosphere
- C 1 Newton per square meter
- D data is insufficient
Explanation:
Question 543: If A=B, which of the following is not correct ?
- A |A| = |B|
- B AB^ = BA^
- C A.B = A^ B^
- D |A^| = |B^|
Explanation:
Question 544: Two coherent sources of light produce interference (destructive) when the phase difference between them is _________?
- A ?
- B ?/4
- C 2?
- D ?/2
Explanation:
Question 545: Atom is the smallest particall which is_________?
- A Indivisible
- B Both
- C Divisible
- D Non of these
Explanation:
Question 546: Mach number is used in connection with the speed of___________?
- A Sound
- B Light
- C Ship
- D aircraft
Explanation:
Question 547: Electromagnetic waves transport___________________?
- A Energy
- B Mass
- C Heat
- D Momentum
Explanation:
Question 548: Inertia is depends upon only?
- A Direction
- B Time
- C Mass
- D Velocity
Explanation:
Question 549: The uncertainty in a measurement may occur due to_______________?
- A Inadequate technique
- B Limitation of an instrument
- C All given in A, B and C
- D Natural variation of the object to be measured
Explanation:
Question 550: The shaft of a motor rotates at a constant angular speed of 360rev/min. Angle turned through in 1 sec in radian is________________?
- A 12?
- B ?
- C 3?
- D 6?
Explanation: