22 January Morning Shift physics questions with solutions

Showing 1–10 of 24 questions

• MCQmediumCurrent electricityElectrical Instruments: Galvanometer, Ammeter, Voltmeter & Potentiometer

  A meter bridge with two resistances R₁ and R₂ as shown in figure was balanced (null point) at 40 cm from the point P. The null point changed to 50 cm from the point P, when 16 Ω resistance is connected in parallel to R₂. The values of resistances R₁ and R₂ are______.

  

  Options

  • Option A

    R₂ = 16 Ω, R₁ = 16/3 Ω

  • Option B

    R₂ = 4 Ω, R₁ = 4/3 Ω

  • Option C

    R₂ = 8 Ω, R₁ = 16/3 Ω

  • Option D

    R₂ = 12 Ω, R₁ = 12/3 Ω

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• NumericmediumWave Motionstationary wave in sound and organ pipe ,resonance tube

  Two loudspeakers (L₁ and L₂) are placed with a separation of 10 m, as shown in figure. Both speakers are fed with an audio input signal of same frequency with constant volume. A voice recorder, initially at point A, at equidistance to both loud speakers, is moved by 25 m along the line AB while monitoring the audio signal. The measured signal was found to undergo 10 cycles of minima and maxima during the movement. The frequency of the input signal is _____ Hz

  (Speed of sound in air is 324 m/s and √5 = 2.23)

  

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• MCQmediumGravitationAcceleration Due to Gravity & Escape Velocity

  The escape velocity from a spherical planet A is 10 km/s. The escape velocity from another planet B whose density and radius are 10% of those of planet A, is______m/s.

  Options

  • Option A

    1000

  • Option B

    200√5

  • Option C

    100√10

  • Option D

    1000√2

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• NumericmediumElectromagnetic Inductionself induction and L-R circuit

  Inductance of a coil with 10⁴ turns is 10 mH and it is connected to a dc source of 10 V with internal resistance of 10 Ω. The energy density in the inductor when the current reaches (1/e) of its maximum value is απ × (1/e²) J/m³. The value of α is ___.

  (μ₀ = 4π × 10⁻⁷ Tm/A)

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• MCQmediumRotational Motionmoment of inertia and kinetic energy in pure rotation

  A solid sphere of mass 5 kg and radius 10 cm is kept in contact with another solid sphere of mass 10 kg and radius 20 cm. The moment of inertia of this pair of spheres about the tangent passing through the point of contact is_________kg.m².

  Options

  • Option A

    0.36

  • Option B

    0.72

  • Option C

    0.18

  • Option D

    0.63

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• NumericmediumGeometrical opticsrefraction due to curved surface

  A parallel beam of light travelling in air (refractive index 1.0) is incident on a convex spherical glass surface of radius of curvature 50 cm. Refractive index of glass is 1.5. The rays converge to a point at a distance x cm from the centre of the curvature of the spherical surface. The value of x is ____ cm.

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• MCQmediumNuclear physicsNucles and its density radius and mass defect ,binding energy and its curve

  The minimum frequency of photon required to break a particle of mass 15.348 amu into 4α particles is ____ kHz.

  [mass of He nucleus = 4.002 amu, 1 amu = 1.66 × 10⁻²⁷ kg, h = 6.6 × 10⁻³⁴ J.s and c = 3 × 10⁸ m/s]

  Options

  • Option A

    9 × 10¹⁹

  • Option B

    9 × 10²⁰

  • Option C

    14.94 × 10²⁰

  • Option D

    14.94 × 10¹⁹

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• MCQeasyGeometrical opticsprism and thin prism

  Consider an equilateral prism (refractive index √2). A ray of light is incident on its one surface at a certain angle i. If the emergent ray is found to graze along the other surface then the angle of refraction at the incident surface is close to ____.

  Options

  • Option A

    15°

  • Option B

    20°

  • Option C

    40°

  • Option D

    30°

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

  7.9 MeV α-particle scatters from a target material of atomic number 79. From the given data the estimated diameter of nuclei of the target material is (approximately)________m.

  [1/(4πε₀) = 9 × 10⁹ Nm²/C² and electron charge = 1.6 × 10⁻¹⁹ C]

  Options

  • Option A

    5.76 × 10⁻¹⁴

  • Option B

    1.44 × 10⁻¹³

  • Option C

    2.88 × 10⁻¹⁴

  • Option D

    1.69 × 10⁻¹²

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• MCQmediumElectrostaticpotential energy and electric potential

  Electric field in a region is given by $\vec{E}$ = Axî + Byĵ, where A = 10 V/m² and B = 5 V/m². If the electric potential at a point (10, 20) is 500 V, then the electric potential at origin is ______ V.

  Options

  • Option A

    1000

  • Option B

    500

  • Option C

    2000

  • Option D

    0

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