JEE Mains Physics 2002-2019 Solved Video Solutions
In a compound microscope, the magnified virtual image is formed at a distance of 25 cm from the eye-piece. The focal length of its objective lens is 1 cm. If the magnification is 100 and the tube length of the microscope is 20 cm, then the focal length of the eye-piece lens (in cm) is ____
18
Sep
In a compound microscope, the magnified virtual image is formed at a distance of 25 cm from the eye-piece. The focal length of its objective lens is 1 cm. If the magnification is 100 and the tube length of the microscope is 20 cm, then the focal length of the eye-piece lens (in cm) is [...]
A circular disc of mass M and radius R is rotating about its axis with angular speed ω1. If another stationary disc having radius R/2 and same mass M is dropped co-axially on to the rotating disc. Gradually both discs attain constant angular speed ω2. The energy lost in the process is p% of the initial energy. Value of p is _____.
18
Sep
A circular disc of mass M and radius R is rotating about its axis with angular speed ω1. If another stationary disc having radius R/2 and same mass M is dropped co-axially on to the rotating disc. Gradually both discs attain constant angular speed ω2. The energy lost in the process is p% of the [...]
Starting from the origin at time t = 0, with initial velocity 5j ms^-1, a particle moves in the x-y plane with a constant acceleration of (10i + 4j) ms^-2. At time t, its coordinates are (20 m, y0 m). The values of t and y0 are, respectively
18
Sep
Starting from the origin at time t = 0, with initial velocity 5j ms^-1, a particle moves in the x-y plane with a constant acceleration of (10i + 4j) ms^-2. At time t, its coordinates are (20 m, y0 m). The values of t and y0 are, respectively a particle moves in the x-y plane [...]
The specific heat of water = 4200 J kg^–1 K^–1 and the latent heat of ice = 3.4 × 10^5 J kg^–1. 100 grams of ice at 0°C is placed in 200 g of water at 25°C. The amount of ice that will melt as the temperature of water reaches 0°C is close to (in grams)
18
Sep
The specific heat of water = 4200 J kg^–1 K^–1 and the latent heat of ice = 3.4 × 10^5 J kg^–1. 100 grams of ice at 0°C is placed in 200 g of water at 25°C. The amount of ice that will melt as the temperature of water reaches 0°C is close to (in [...]
The following figure shows few data points in a photo electric effect experiment for a certain metal. The minimum energy for ejection of electron from its surface is (Planck’s constant h = 6.62 × 10^–34 J.s)
18
Sep
The following figure shows few data points in a photo electric effect experiment for a certain metal. The minimum energy for ejection of electron from its surface is (Planck’s constant h = 6.62 × 10^–34 J.s) A balloon filled with helium (32°C and 1.7 atm.) bursts. Immediately afterwards the expansion of helium can be considered [...]
Match the Cp/Cv ratio for ideal gases with different type of molecules
18
Sep
Match the Cp/Cv ratio for ideal gases with different type of molecules Match the Cp/Cv ratio for ideal gases with different type of molecules September 18, 2021 Category: JEE Mains Physics 2002-2019 Solved Video Solutions , Practice Set 1 ,
A battery of 3.0 V is connected to a resistor dissipating 0.5 W of power. If the terminal voltage of the battery is 2.5 V, the power dissipated within the internal resistance is
18
Sep
A battery of 3.0 V is connected to a resistor dissipating 0.5 W of power. If the terminal voltage of the battery is 2.5 V, the power dissipated within the internal resistance is A battery of 3.0 V is connected to a resistor dissipating 0.5 W of power. If the terminal voltage of the battery [...]
On the x-axis and at a distance x from the origin, the gravitational field due to a mass distribution is given by Ax/(x^2 + a^2)^3/2 in the x-direction. The magnitude of gravitational potential on the x-axis at a distance x, taking its value to be zero at infinity, is
18
Sep
On the x-axis and at a distance x from the origin, the gravitational field due to a mass distribution is given by Ax/(x^2 + a^2)^3/2 in the x-direction. The magnitude of gravitational potential on the x-axis at a distance x, taking its value to be zero at infinity, is is On the x-axis and at [...]
A wire A, bent in the shape of an arc of a circle, carrying a current of 2 A and having radius 2 cm and another wire B, also bent in the shape of arc of a circle, carrying a current of 3 A and having radius of 4 cm, are placed as shown in the figure. The ratio of the magnetic fields due to the wires A and B at the common centre O is
18
Sep
A wire A, bent in the shape of an arc of a circle, carrying a current of 2 A and having radius 2 cm and another wire B, also bent in the shape of arc of a circle, carrying a current of 3 A and having radius of 4 cm, are placed as shown in [...]
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A wire A ,
also bent in the shape of arc of a circle ,
are placed as shown in the figure. The ratio of the magnetic fields due to the wires A and B at the common centre O is ,
bent in the shape of an arc of a circle ,
carrying a current of 2 A and having radius 2 cm and another wire B ,
carrying a current of 3 A and having radius of 4 cm ,
Choose the correct option relating wavelengths of different parts of electromagnetic wave spectrum
18
Sep
Choose the correct option relating wavelengths of different parts of electromagnetic wave spectrum Choose the correct option relating wavelengths of different parts of electromagnetic wave spectrum September 18, 2021 Category: JEE Mains Physics 2002-2019 Solved Video Solutions , Practice Set 1 ,