24 January Morning Shift physics questions with solutions

Showing 1–10 of 25 questions

• MCQeasyNewtons law of motion and Frictionspring related problem

  A spring of force constant 15 N/m is cut into two pieces. If the ratio of their length is 1:3, then the force constant of smaller piece is____N/m

  Options

  • Option A

    15

  • Option B

    20

  • Option C

    60

  • Option D

    45

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• MCQeasyElectrostaticselectric dipole and dipole moment

  Three charges +2q, +3q and -4q are situated at (0, -3a), (2a, 0) and (-2a, 0) respectively in the xy plane. The resultant dipole moment about origin is___

  Options

  • Option A

    2qa(3ĵ - î)

  • Option B

    2qa(3î - 7ĵ)

  • Option C

    2qa(7î - 3ĵ)

  • Option D

    2qa(3ĵ - 7î)

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• NumericmediumThermodyanmicsthermodynmic process and work done

  A gas of certain mass filled in a closed cylinder at a pressure of 3.23 kPa has temperature 50°C. The gas is now heated to double its temperature. The modified pressure is _______ Pa.

  Your answer

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• MCQmediumAc Cirucuitsseries combination of ac circuit and L-C-R circuit

  For the series LCR circuit connected with 220 V, 50 Hz a.c source as shown in the figure, the power factor is α/10. The value of α is______.

  The circuit has R = 60 Ω, X(L) = 70 Ω and X(C) = 150 Ω.

  

  Options

  • Option A

    4

  • Option B

    10

  • Option C

    6

  • Option D

    8

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• MCQeasyCurrent electricityelectric instruments

  Two resistors of 100 Ω each are connected in series with a 9V battery. A voltmeter of 400 Ω resistance is connected to measure the voltage drop across one of the resistors. The voltmeter reading is____V.

  Options

  • Option A

    3

  • Option B

    4.5

  • Option C

    4

  • Option D

    2

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• MCQeasyElectromagnetic wavedisplacement current and properties of electromagnetic wave

  Match the List-I with List-II

  List-I
  A. Radio-wave
  B. Micro-wave
  C. Infrared-wave
  D. X-ray

  List-II I. is produced by Magnetron valve II. Due to change in the vibrational modes of atoms III. Due to inner shell electrons moving from higher energy level to lower energy level IV. Due to rapid acceleration of electrons

  Choose the correct answer from the options given below:

  Options

  • Option A

    A-II, B-IV, C-III, D-I

  • Option B

    A-IV, B-III, C-I, D-II

  • Option C

    A-IV, B-I, C-II, D-III

  • Option D

    A-IV, B-II, C-I, D-III

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• MCQmediumSimple Harmonic Motiontime period of linear shm

  A cylindrical block of mass M and area of cross section A is floating in a liquid of density ρ and with its axis vertical. When depressed a little and released the block starts oscillating. The period of oscillation is________.

  Options

  • Option A

    2π√[M/(ρAg)]

  • Option B

    π√[2M/(ρAg)]

  • Option C

    π√[ρA/(Mg)]

  • Option D

    2π√[ρA/(Mg)]

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• MCQmediumAtomic Structure and X-raysatomic structure and bohr atomic model

  Two electrons are moving in orbits of two hydrogen like atoms with speeds 3 × 10⁵ m/s and 2.5 × 10⁵ m/s respectively. If the radii of these orbits are nearly same then the possible order of energy states are_____ respectively.

  Options

  • Option A

    6 and 5

  • Option B

    9 and 8

  • Option C

    8 and 10

  • Option D

    10 and 12

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• MCQmediumCurrent electricityelectric instruments

  Two resistors 2 Ω and 3 Ω are connected in the gaps of bridge as shown in figure. The null point is obtained with the contact of jockey at some point on wire XY. When an unknown resistor is connected in parallel with 3 Ω resistor, the null point is shifted by 22.5 cm toward Y. The resistance of unknown resistor is____Ω.

  

  Options

  • Option A

    3

  • Option B

    2

  • Option C

    4

  • Option D

    1

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• MCQmediumGravitationlaw of gravitation ,gravitational field intensity ,gravitational potential and potential energy

  Three masses 200 kg, 300 kg and 400 kg are placed at the vertices of an equilateral triangle with sides 20 m. They are rearranged on the vertices of a bigger triangle of side 25 m and with the same centre. The work done in this process _________ J.

  (Gravitational constant G = 6.7 × 10⁻¹¹ N·m²/kg²)

  Options

  • Option A

    9.86 × 10⁻⁶

  • Option B

    2.85 × 10⁻⁷

  • Option C

    1.74 × 10⁻⁷

  • Option D

    4.77 × 10⁻⁷

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