22 January Evening Shift physics questions with solutions

Showing 1–10 of 24 questions

• MCQeasyElectrostaticspotential energy and electric potential

  Five positive charges each having charge q are placed at the vertices of a pentagon as shown in the figure. The electric potential (V) and the electric field ($\vec{E}$) at the center O of the pentagon due to these five positive charges are :

  

  Options

  • Option A

    V = 5q/(4πε₀r) and E = 0

  • Option B

    V = 5q/(4πε₀r) and $\vec{E}$ = [5√3q/(8πε₀r²)] r̂

  • Option C

    V = 5q/(4πε₀r) and $\vec{E}$ = [5q/(4πε₀r²)] r̂

  • Option D

    V = 0 and E= 0

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• MCQmediumThermodyanmicskinetic therory of gaseous

  Consider two boxes containing ideal gases A and B such that their temperatures, pressures and number densities are same. The molecular size of A is half of that of B and mass of molecule A is four times that of B. If the collision frequency in gas B is 32 × 10¹⁸/s then collision frequency in gas A is _____/s.

  Options

  • Option A

    32 × 10¹⁸

  • Option B

    4 × 10¹⁸

  • Option C

    2 × 10¹⁸

  • Option D

    8 × 10¹⁸

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• NumericeasyCapacitorconnecting of capacitor with battery,connenctiong of two capacitor

  A capacitor P with capacitance 10 × 10⁻⁶ F is fully charged with a potential difference of 6.0 V and disconnected from the battery. The charged capacitor P is connected across another capacitor Q with capacitance 20 × 10⁻⁶ F. The charge on capacitor Q when equilibrium is established will be α × 10⁻⁵ C (assume capacitor Q does not have any charge initially), the value of α is _______ .

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• NumericeasyThermodyanmicsthermodynmic process and work done

  An insulated cylinder of volume 60 cm³ is filled with a gas at 27°C and 2 atmospheric pressure. Then the gas is compressed making the final volume as 20 cm³ while allowing the temperature to rise to 77°C. The final pressure is _______ atmospheric pressure.

  Your answer

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• MCQmediumGravitationsattelite and keplers law

  Given below are two statements :

  Statement I : A satellite is moving around earth in the orbit very close to the earth surface. The time period of revolution of satellite depends upon the density of earth.

  Statement II : The time period of revolution of the satellite is T = 2π√(Rₑ/g) (for satellite very close to the earth surface), where Rₑ radius of earth and g acceleration due to gravity.

  In the light of the above statements, choose the correct answer from the options given below :

  Options

  • Option A

    Both Statement I and Statement II are false

  • Option B

    Both Statement I and Statement II are true

  • Option C

    Statement I is true but Statement II is false

  • Option D

    Statement I is false but Statement II is true

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• MCQeasyGeometrical opticslaw of refraction and total internal reflection

  The wavelength of light, while it is passing through water is 540 nm. The refractive index of water is 4/3. The wavelength of the same light when it is passing through a transparent medium having refractive index of 3/2 is _________nm.

  Options

  • Option A

    380

  • Option B

    840

  • Option C

    480

  • Option D

    540

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• MCQeasyPhotoelectric effect and dual nature of matterquestion based on photoelectric effect

  Light is incident on a metallic plate having work function 110 × 10⁻²⁰ J. If the produced photoelectrons have zero kinetic energy then the angular frequency of the incident light is _________ rad/s. (h = 6.63 × 10⁻³⁴ J.s)

  Options

  • Option A

    1.04 × 10¹⁶

  • Option B

    1.04 × 10¹³

  • Option C

    1.66 × 10¹⁶

  • Option D

    1.66 × 10¹⁵

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• MCQmediumWork , Power and Energyconservative force and potential energy

  Given below are two statements :

  Statement I : An object moves from position r₁ to position r₂ under a conservative force field F. The work done by the force is W = -∫ $\vec{F}.\vec{dr}$ from r₁ to r₂.

  Statement II : Any object moving from one location to another location can follow infinite number of paths. Therefore, the amount of work done by the object changes with the path it follows for a conservative force.

  In the light of the above statements, choose the correct answer from the options given below :

  Options

  • Option A

    Both Statement I and Statement II are true

  • Option B

    Statement I is false but Statement II is true

  • Option C

    Statement I is true but Statement II is false

  • Option D

    Both Statement I and Statement II are false

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

  The smallest wavelength of Lyman series is 91 nm. The difference between the largest wavelengths of Paschen and Balmer series is nearly ____ nm.

  Options

  • Option A

    1875

  • Option B

    1550

  • Option C

    1217

  • Option D

    1784

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• MCQmediumsemiconductorlogic gate

  The correct truth table for the given input data of the following logic gate is :

  

  Options

  • Option A

    A B C D | Y

    1 1 0 1 | 1

    0 0 1 1 | 0

    1 0 1 0 | 1

    1 1 1 1 | 0

  • Option B

    A B C D | Y

    1 1 0 1 | 1

    0 0 1 1 | 0

    1 0 1 0 | 0

    1 1 1 1 | 1

  • Option C

    A B C D | Y

    1 1 0 1 | 0

    0 0 1 1 | 0

    1 0 1 0 | 1

    1 1 1 1 | 1

  • Option D

    A B C D | Y

    1 1 0 1 | 0

    0 0 1 1 | 1

    1 0 1 0 | 1

    1 1 1 1 | 1

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