CBSE 12 Physics Question Paper-2020 Set-5 - Practice Test

8.854 × 10^12 C² N⁻¹ m² 1 40 = 9 × 10⁹ N m² C² Mass of electron (me) =

9.1 × 10³¹ kg Mass of neutron =

1.675 × 10²⁷ kg Mass of proton =

The relationship between Brewster angle and the speed of light v in the denser medium is: (a) v tan θ = c (b) c tan θ = v (c) v sin θ = c (d) c sin θ = v

The graph showing the correct variation of linear momentum (p) of a charged particle with its de-Broglie wavelength (λ) is:

The wavelength and intensity of light emitted by a LED depend upon: (a) forward bias and energy gap of the semiconductor (b) energy gap of the semiconductor and reverse bias (c) energy gap only (d) forward bias only

The equation E = mc² is related to:

The force between two charges is inversely proportional to:

The principle of superposition is applicable to:

The unit of electric charge is:

The SI unit of frequency is:

Which of the following is a scalar quantity?

In a wave, the displacement of particles is maximum at the:

The speed of light in a vacuum is approximately:

The formula for work done is:

In an electric circuit, the total resistance in a series connection is:

The unit of electric potential is:

The acceleration due to gravity on the surface of the Earth is approximately:

Which of the following particles has no charge?

The law of conservation of energy states that energy can neither be:

The unit of electric charge is:

The velocity of an object moving with uniform speed is:

The force between two charges is inversely proportional to:

In an electric circuit, the total resistance in a parallel connection is:

Which of the following is an example of a vector quantity?

The energy required to move a charge of 1 Coulomb between two points having a potential difference of 1 Volt is:

The capacitance of a parallel plate capacitor depends on:

The SI unit of power is:

The magnetic field around a current-carrying wire is:

Which of the following particles has the largest mass?