JEE Mains Physics 2002-2019 Solved Video Solutions
An infinite number of point charges, each carrying 1 μC charge, are placed along the y-axis at y = 1 m, 2 m, 4 m, 8 m……………… The total force on a 1 C point charge, placed at the origin, is x × 10^3 N. The value of x, to the nearest integer, is……… [Take 14πε0 = 9 x 10^9 Nm^2/C^2]
29
Sep
An infinite number of point charges, each carrying 1 μC charge, are placed along the y-axis at y = 1 m, 2 m, 4 m, 8 m……………… The total force on a 1 C point charge, placed at the origin, is x × 10^3 N. The value of x, to the nearest integer, is……… [Take [...]
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2 m ,
4 m ,
8 m.................. The total force on a 1 C point charge ,
An infinite number of point charges ,
are placed along the y-axis at y = 1 m ,
each carrying 1 μC charge ,
is x × 10^3 N. The value of x ,
is......... [Take 14πε0 = 9 x 10^9 Nm^2/C^2] ,
placed at the origin ,
to the nearest integer ,
The radius of a sphere is measured to be (7.50 ± 0.85) cm. Suppose the percentage error in its volume is x. The value of x, to the nearest integer, is……..
29
Sep
The radius of a sphere is measured to be (7.50 ± 0.85) cm. Suppose the percentage error in its volume is x. The value of x, to the nearest integer, is…….. is The radius of a sphere is measured to be (7.50 ± 0.85) cm. Suppose the percentage error in its volume is x. The [...]
A TV transmission tower antenna is at a height of 20 m. Suppose that the receiving antenna is at. (i) ground level (ii) a height of 5 m. The increase in antenna range in case (ii) relative to case (i) is n%. The value of n, to the nearest integer, is .
29
Sep
A TV transmission tower antenna is at a height of 20 m. Suppose that the receiving antenna is at. (i) ground level (ii) a height of 5 m. The increase in antenna range in case (ii) relative to case (i) is n%. The value of n, to the nearest integer, is . The decay of [...]
The typical output characteristics curve for a transistor working in the common-emitter configuration is shown in the figure. The estimated current gain from the figure is
29
Sep
The typical output characteristics curve for a transistor working in the common-emitter configuration is shown in the figure. The estimated current gain from the figure is The typical output characteristics curve for a transistor working in the common-emitter configuration is shown in the figure. The estimated current gain from the figure is September 29, 2021 [...]
The projectile motion of a particle of mass 5 g is shown in the figure. The initial velocity of the particle is 5√2 ms^–1 and the air resistance is assumed to be negligible. The magnitude of the change in momentum between the points A and B is x × 10^–2 kgms–1. The value of x, to the nearest integer, is ……..
29
Sep
The projectile motion of a particle of mass 5 g is shown in the figure. The initial velocity of the particle is 5√2 ms^–1 and the air resistance is assumed to be negligible. The magnitude of the change in momentum between the points A and B is x × 10^–2 kgms–1. The value of x, [...]
A ball of mass 4 kg, moving with a velocity of 10 ms^–1, collides with a spring of length 8 m and force constant 100 Nm^–1. The length of the compressed spring is x m. The value of x, to the nearest integer, is……
29
Sep
A ball of mass 4 kg, moving with a velocity of 10 ms^–1, collides with a spring of length 8 m and force constant 100 Nm^–1. The length of the compressed spring is x m. The value of x, to the nearest integer, is…… A ball of mass 4 kg collides with a spring of [...]
The speed of electrons in a scanning electron microscope is 1 × 10^7 ms^–1. If the protons having the same speed are used instead of electrons, then the resolving power of scanning proton microscope will be changed by a factor of:
29
Sep
The speed of electrons in a scanning electron microscope is 1 × 10^7 ms^–1. If the protons having the same speed are used instead of electrons, then the resolving power of scanning proton microscope will be changed by a factor of: The speed of electrons in a scanning electron microscope is 1 × 10^7 ms^–1. [...]
Consider a sample of oxygen behaving like an ideal gas. At 300 K, the ratio of root mean square (rms) velocity to the average velocity of gas molecule would be : (Molecular weight of oxygen is 32 g/mol; R = 8.3 J K^–1 mol^–1
29
Sep
Consider a sample of oxygen behaving like an ideal gas. At 300 K, the ratio of root mean square (rms) velocity to the average velocity of gas molecule would be : (Molecular weight of oxygen is 32 g/mol; R = 8.3 J K^–1 mol^–1 Consider a sample of oxygen behaving like an ideal gas. At [...]
An ideal gas in a cylinder is separated by a piston in such a way that the entropy of one part is S1 and that of the other part is S2. Given that S1 > S2. If the piston is removed then the total entropy of the system will be :
29
Sep
An ideal gas in a cylinder is separated by a piston in such a way that the entropy of one part is S1 and that of the other part is S2. Given that S1 > S2. If the piston is removed then the total entropy of the system will be : Match List - I [...]
A particle of mass m moves in a circular orbit under the central potential field, U(r) = −C/r, where C is a positive constant. The correct radius – velocity graph of the particle’s motion is :
29
Sep
A particle of mass m moves in a circular orbit under the central potential field, U(r) = −C/r, where C is a positive constant. The correct radius – velocity graph of the particle’s motion is : A particle of mass m moves in a circular orbit under the central potential field U(r) = −C/r where [...]