TOP 100 Physics MCQS
All Questions for: TOP 100 Physics MCQS
Question 651: The relativistic energy E is equivalent to relativistic mass given by_______________?
- A Ec2
- B E/c2
- C c2/E
- D E/c
Explanation:
Question 652: The period of a circular motion is given by_______________?
- A T = 2?r
- B T = ?w
- C T = ?v
- D T = 2?r/v
Explanation:
Question 653: The unit of force is _________ and its symbol is ______________ Which is the correct pair ?
- A newton, N
- B Newton, n
- C newton, n
- D Newton, N
Explanation:
Question 654: The size of one degree of Celsius is equal to_________________?
- A 1.8 degrees of Fahrenheit scale
- B 3.2 degrees of Fahrenheit scale
- C 2.12 degrees of Fahrenheit scale
- D One degree of Fahrenheit scale
Explanation:
Question 655: 1024 can be written in scientific notation as______________?
- A 1/0.00097
- B 2 Raised to power 10
- C 1.024
- D 0.000976
Explanation:
Question 656: The electric P.E of an electron in an orbit at a distance rn from the positive charge_____________?
- A
- B Ke2/rn
- C Ke2/rn2
- D
Explanation:
Question 657: A___________has no size or shape, just position.
- A line
- B bottom
- C point
- D vertex
Explanation:
Question 658: During the fission process a large amount of______________?
- A Heat energy is released
- B Light energy is released
- C Nuclear energy is released
- D Chemical energy is released
Explanation:
Question 659: Centripetal force performs_______________?
- A No work
- B Negative work
- C Maximum work
- D Minimum work
Explanation:
Question 660: Which branch of science plays an important role in the development of technology and engineering ?
- A Chemistry
- B Physics
- C Biology
- D Geology
Explanation:
Question 661: Temperature is a property which determines_________________?
- A In which direction heat will flow between two systems
- B How much total absolute energy a body has
- C Whether a body will feel hot or cold to touch
- D How much heat a body contains
Explanation:
Question 662: A vector can have maximum________components in a plane.?
- A Three
- B Infinite
- C Zero
- D Two
Explanation:
Question 663: Which one of the following is not an electromechanical instrument ?
- A AC transformer and DC generator
- B voltmeter
- C galvanometer
- D ammeter
Explanation:
Question 664: In fission process_______.
- A massive nucleus join together
- B None of these
- C massive nucleus splits to form smaller fragments
- D both A & B
Explanation:
Question 665: A low resistance which can bypass a current is: _____________?
- A Multiplier
- B Shunt
- C Divider
- D None of these
Explanation:
Question 666: 1atm is equal to
- A all of the above
- B 101.3 kPa
- C 760 torr
- D 760 mmHg
Explanation:
Question 667: In vibratory motion_________________?
- A total energy remains constant
- B total momentum remains constant
- C K E remain constant
- D P E remains constant
Explanation:
Question 668: Potential energy means?
- A Due to position of object
- B Due to gravity
- C None of these
- D Due to motion of object
Explanation:
Question 669: Smaller the least count of the instrument more is the measurement________________?
- A Precise
- B None of these
- C Accurate and precise
- D Accurate
Explanation:
Question 670: A rubber cord of cross-sectional area 2cm2 has a length of 1m. When a tensile force of 10N is applied the length of the cord increases by 1cm. What is the youngs modulus of rubber ?
- A 0.2
- B 2
- C 5
- D 0.5
Explanation:
Question 671: For normal adjustment, length of astronomical telescope is______________?
- A fo
- B fo / fe
- C fe / fo
- D fo + fe
Explanation:
Question 672: In a photoelectric effect monochromatic light is incident on a metal surface. If the incident light of twice the intensity but of same wavelength the kinetic energy of the emitted electron_______________?
- A Remains same
- B First increases then decrease because of the curvilinear graph
- C Becomes half
- D Becomes double
Explanation:
Question 673: A convex lens of focal length f1 and a concave lens of focal length f2 are placed in contact. The focal length of the combination is_____________?
- A f1f2/f1-f2
- B f2
- C f2 + f1
- D f1f2/f2+f1
Explanation:
Question 674: The deflection for 50 division of galvanometer is decreased to 25 divisions by shunt resistance of 12?. Galvanometer resistance is_____________?
- A 30?
- B 24?
- C 18?
- D 12?
Explanation:
Question 675: The rotational K.E of the hoop is equal to the______________?
- A four times than its translational K.E
- B its translational K.E
- C half than its translational K.E
- D double than its translational K.E
Explanation:
Question 676: The time period of a second pendulum is______________?
- A 2 seconds
- B 6 seconds
- C 4 seconds
- D 3 seconds
Explanation:
Question 677: Heating a magnet will ____________________?
- A demagnetize it completely
- B weaken it
- C strengthen it
- D reverse its polarity
Explanation:
Question 678: According to Pascals law the pressure of gas in a vessel is_____________?
- A Same only along opposite directions
- B Same only along normal directions
- C Same in all direction
- D Different in different direction
Explanation:
Question 679: The charge on alpha particles is________________?
- A Minus one
- B Minus two
- C Plus two
- D Plus one
Explanation:
Question 680: Any alteration produced in shapes length or volume when a body is subjected to some external force is called____________________?
- A Toughness
- B Extension
- C Deformation
- D Stiffness
Explanation:
Question 681: Bernoulli
- A Energy
- B Momentum
- C Mass
- D Fluid
Explanation:
Question 682: We prefer mercury as a thermometric substance because______________?
- A All of above
- B It does not stick to thermometer glass
- C Over a wide range of temperature its expansion is uniform
- D It opaque to light
Explanation:
Question 683: The number of significant figures in 5.400 is________________?
- A 5
- B None
- C 2
- D 3
Explanation:
Question 684: A vector can have maximum________components in space.?
- A Infinite
- B Zero
- C Three
- D Two
Explanation:
Question 685: A ball is thrown towards the earth and bounce back. During this process:
- A Direction of velocity and acceleration changes
- B Direction of Displacement and Velocity changes
- C Direction of Displacement, Velocity and acceleration changes
- D Direction of Displacement and acceleration changes
Explanation:
Question 686: Photon of highest frequency will be absorbed when transition takes place from_____________?
- A 1st to 5th orbit
- B 4th to 5th orbit
- C 2nd to 5th orbit
- D 3rd to 5th orbit
Explanation:
Question 687: The speed of light will be minimum while passing through ?
- A Glass
- B Air
- C Water
- D Vaccum
Explanation:
Question 688: What is unit of conductivity?
- A Ohm
- B mho
- C Watt
- D None of these
Explanation:
Question 689: Transuranic elements have an atomic number_______________?
- A Greater than 72
- B Greater than 92
- C Greater than 82
- D Greater than 102
Explanation:
Question 690: Ammeter connected in an AC circuit measures______________?
- A The exact value of the current
- B The net value of the current
- C RMS value of the current
- D The peak value of the current
Explanation:
Question 691: In a multi range ammeter as the range increases _____________________?
- A shunt value decreases
- B shunt value increases
- C none of the above
- D shunt value remains the same
Explanation:
Question 692: A black body emitting all the radiation in the visible region appears________.
- A Blue
- B Black
- C White
- D Green
Explanation:
Question 693: Addition of vectors obeys_______law?
- A All of these
- B Distributive Law
- C Associative Law
- D Commutative Law
Explanation:
Question 694: Two fog droplets have radius 2:3 their terminal velocities are_______________?
- A 4:09
- B 4.3
- C 2:09
- D 4:06
Explanation:
Question 695: The function of collimeter in spectrometer is________________?
- A no function
- B to make them
- C to produce parallel beams of light
- D to filter the light rays
Explanation:
Question 696: Stokes law is applicable if body has __________shape?
- A Square
- B Circular
- C Rough
- D Spherical
Explanation:
Question 697: The penetration power of alpha particle as compared to beta particle is_______________?
- A 100 times less
- B 100 times more
- C 10 times less
- D 10 times more
Explanation:
Question 698: With the increase of pressure, the boiling point of any substance:
- A Becomes Zero
- B Increases
- C Decreases
- D Remains same
Explanation:
Question 699: A force On particle is conservative if:________?
- A It
- B It
- C It
- D It work depends on the end points of every motion, not on the path between
Explanation:
Question 700: If a vector ? is making an angle
- A None
- B Ay= ASin?
- C Ax= ACos?
- D Ay= ACos?
Explanation: