Practice Set 1
Two uniform circular discs are rotating independently in the same direction around their common axis passing through their centres. The moment of inertia and angular velocity of the first disc are 0.1 kg-m^2 and 10 rad s–1 respectively while those for the second one are 0.2 kg-m^2 and 5 rad s–1 respectively. At some instant they get stuck together and start rotating as a single system about their common axis with some angular speed. The kinetic energy of the combined system is
18
Sep
Two uniform circular discs are rotating independently in the same direction around their common axis passing through their centres. The moment of inertia and angular velocity of the first disc are 0.1 kg-m^2 and 10 rad s–1 respectively while those for the second one are 0.2 kg-m^2 and 5 rad s–1 respectively. At some instant [...]
The displacement time graph of a particle executing S.H.M is given in figure (sketch is schematic and not to scale) Which of the following statements is/are true for this motion?
18
Sep
The displacement time graph of a particle executing S.H.M is given in figure (sketch is schematic and not to scale) Which of the following statements is/are true for this motion? The displacement time graph of a particle executing S.H.M is given in figure (sketch is schematic and not to scale) Which of the following statements [...]
A charge Q is distributed over two concentric hollow spheres of radii r and R (>r) such that the surface densities are equal and placed on the same axial points. Then the potential at the common centre is
18
Sep
A charge Q is distributed over two concentric hollow spheres of radii r and R (>r) such that the surface densities are equal and placed on the same axial points. Then the potential at the common centre is area A and force F are chosen as fundamental units If speed (V) then the dimension of [...]
In a Young’s double slit experiment, 16 fringes are observed in a certain segment of the screen when light of a wavelength 700 nm is used. If the wavelength of light is changed to 400 nm, the number of fringes observed in the same segment of the screen would be
18
Sep
In a Young’s double slit experiment, 16 fringes are observed in a certain segment of the screen when light of a wavelength 700 nm is used. If the wavelength of light is changed to 400 nm, the number of fringes observed in the same segment of the screen would be 16 fringes are observed in [...]
A potentiometer wire PQ of 1 m length is connected to a standard cell E1. Another cell E2 of emf 1.02 V is connected with a resistance ‘r’ and switch S (as shown in figure). With switch S open, the null position is obtained at a distance of 49 cm from Q. The potential gradient in the potentiometer wire is
18
Sep
A potentiometer wire PQ of 1 m length is connected to a standard cell E1. Another cell E2 of emf 1.02 V is connected with a resistance ‘r’ and switch S (as shown in figure). With switch S open, the null position is obtained at a distance of 49 cm from Q. The potential gradient [...]
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A potentiometer wire PQ of 1 m length is connected to a standard cell E1. Another cell E2 of emf 1.02 V is connected with a resistance ‘r’ and switch S (as shown in figure). With switch S open ,
the null position is obtained at a distance of 49 cm from Q. The potential gradient in the potentiometer wire is ,
A small point mass carrying some positive charge on it, is released from the edge of a table. There is a uniform electric field in this region in the horizontal direction. Which of the following options then correctly describe the trajectory of the mass? (Curves are drawn schematically and are not to scale).
18
Sep
A small point mass carrying some positive charge on it, is released from the edge of a table. There is a uniform electric field in this region in the horizontal direction. Which of the following options then correctly describe the trajectory of the mass? (Curves are drawn schematically and are not to scale). A small [...]
In the following digital circuit, what will be the output at ‘Z’, when the input (A, B) are (1, 0), (0, 0), (1, 1,), (0, 1) ?
18
Sep
In the following digital circuit, what will be the output at ‘Z’, when the input (A, B) are (1, 0), (0, 0), (1, 1,), (0, 1) ? ) 0 ) 1 B) are (1 In the following digital circuit what will be the output at ‘Z’ when the input (A September 18, 2021 Category: JEE [...]
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) ,
0 ) ,
1 ,
B) are (1 ,
In the following digital circuit ,
what will be the output at ‘Z’ ,
when the input (A ,
In a plane electromagnetic wave, the directions of electric field and magnetic field are represented by k^ and 2i^−2j^ , respectively. What is the unit vector along direction of propagation of the wave?
18
Sep
In a plane electromagnetic wave, the directions of electric field and magnetic field are represented by k^ and 2i^−2j^ , respectively. What is the unit vector along direction of propagation of the wave? In a plane electromagnetic wave respectively. What is the unit vector along direction of propagation of the wave? the directions of electric [...]
A particle is moving 5 times as fast as an electron. The ratio of the de-Broglie wavelength of the particle to that of the electron is 1.878 × 10^–4. The mass of the particle is close to
18
Sep
A particle is moving 5 times as fast as an electron. The ratio of the de-Broglie wavelength of the particle to that of the electron is 1.878 × 10^–4. The mass of the particle is close to A particle is moving 5 times as fast as an electron. The ratio of the de-Broglie wavelength of [...]
A wire carrying current I is bent in the shape ABCDEFA as shown, where rectangle ABCDA and ADEFA are perpendicular to each other. If the sides of the rectangles are of lengths a and b, then the magnitude and direction of magnetic moment of the loop ABCDEFA is
18
Sep
A wire carrying current I is bent in the shape ABCDEFA as shown, where rectangle ABCDA and ADEFA are perpendicular to each other. If the sides of the rectangles are of lengths a and b, then the magnitude and direction of magnetic moment of the loop ABCDEFA is A wire carrying current I is bent [...]