JEE Mains Physics 2002-2019 Solved Video Solutions
With increasing biasing voltage of a photodiode, the photocurrent magnitude
19
Sep
With increasing biasing voltage of a photodiode, the photocurrent magnitude the photocurrent magnitude With increasing biasing voltage of a photodiode September 19, 2021 Category: JEE Mains Physics 2002-2019 Solved Video Solutions , Practice Set 1 ,
In a resonance tube experiment when the tube is filled with water up to a height of 17.0 cm from bottom, it resonates with a given tuning fork. When the water level is raised the next resonance with the same tuning fork occurs at a height of 24.5 cm. If the velocity of sound in air is 330 m/s, the tuning fork frequency is
19
Sep
In a resonance tube experiment when the tube is filled with water up to a height of 17.0 cm from bottom, it resonates with a given tuning fork. When the water level is raised the next resonance with the same tuning fork occurs at a height of 24.5 cm. If the velocity of sound in [...]
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In a resonance tube experiment when the tube is filled with water up to a height of 17.0 cm from bottom ,
it resonates with a given tuning fork. When the water level is raised the next resonance with the same tuning fork occurs at a height of 24.5 cm. If the velocity of sound in air is 330 m/s ,
the tuning fork frequency is ,
Activities of three radioactive substances A, B and C are represented by the curves A, B and C, in the figure. Then their half-lives T 1/2 (A) : T 1/2 (B) : T 1/2 (C) are in the ratio
19
Sep
Activities of three radioactive substances A, B and C are represented by the curves A, B and C, in the figure. Then their half-lives T 1/2 (A) : T 1/2 (B) : T 1/2 (C) are in the ratio Activities of three radioactive substances A B and C are represented by the curves A b [...]
A square loop of side 2a and carrying current I is kept in xy plane with its centre at origin. A long wire carrying the same current I is placed parallel to z-axis and passing through point (0, b, 0), (b >> a). The magnitude of torque on the loop about z-axis will be
19
Sep
A square loop of side 2a and carrying current I is kept in xy plane with its centre at origin. A long wire carrying the same current I is placed parallel to z-axis and passing through point (0, b, 0), (b >> a). The magnitude of torque on the loop about z-axis will be (b [...]
A helicopter rises from rest on the ground vertically upwards with a constant acceleration g. A food packet is dropped from the helicopter when it is at a height h. The time taken by the packet to reach the ground is close to [g is the acceleration due to gravity]
19
Sep
A helicopter rises from rest on the ground vertically upwards with a constant acceleration g. A food packet is dropped from the helicopter when it is at a height h. The time taken by the packet to reach the ground is close to [g is the acceleration due to gravity] The value of current i1 [...]
The value of the acceleration due to gravity is g1 at a height h = R/2 (R = radius of the earth) from the surface of the earth. It is again equal to g1 at a depth d below the surface of the earth. The ratio ( d/R) equals
19
Sep
The value of the acceleration due to gravity is g1 at a height h = R/2 (R = radius of the earth) from the surface of the earth. It is again equal to g1 at a depth d below the surface of the earth. The ratio ( d/R) equals The value of current i1 flowing [...]
Two capacitors of capacitances C and 2C are charged to potential differences V and 2V, respectively. These are then connected in parallel in such a manner that the positive terminal of one is connected to the negative terminal of the other. The final energy of this configuration is
19
Sep
Two capacitors of capacitances C and 2C are charged to potential differences V and 2V, respectively. These are then connected in parallel in such a manner that the positive terminal of one is connected to the negative terminal of the other. The final energy of this configuration is respectively. These are then connected in parallel [...]
A wheel is rotating freely with an angular speed ω on a shaft. The moment of inertia of the wheel is I and the moment of inertia of the shaft is negligible. Another wheel of moment of inertia 3I initially at rest is suddenly coupled to the same shaft. The resultant fractional loss in the kinetic energy of the system is
19
Sep
A wheel is rotating freely with an angular speed ω on a shaft. The moment of inertia of the wheel is I and the moment of inertia of the shaft is negligible. Another wheel of moment of inertia 3I initially at rest is suddenly coupled to the same shaft. The resultant fractional loss in the [...]
A galvanometer of resistance G is converted into a voltmeter of range 0 – 1 V by connecting a resistance R1 in series with it. The additional resistance that should be connected in series with R1 to increase the range of the voltmeter to 0 – 2 V will be
19
Sep
A galvanometer of resistance G is converted into a voltmeter of range 0 – 1 V by connecting a resistance R1 in series with it. The additional resistance that should be connected in series with R1 to increase the range of the voltmeter to 0 – 2 V will be The value of current i1 [...]
An electron is constrained to move along the y-axis with a speed of 0.1 c (c is the speed of light) in the presence of electromagnetic wave, whose electric field is E = 30 j^ sin(1.5 x 10^7t – 5 x 10^-2 x) V/m. The maximum magnetic force experienced by the electron will be (given c = 3 × 10^8 ms–1 and electron charge = 1.6 × 10^–19 C)
18
Sep
An electron is constrained to move along the y-axis with a speed of 0.1 c (c is the speed of light) in the presence of electromagnetic wave, whose electric field is E = 30 j^ sin(1.5 x 10^7t – 5 x 10^-2 x) V/m. The maximum magnetic force experienced by the electron will be (given [...]
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An electron is constrained to move along the y-axis with a speed of 0.1 c (c is the speed of light) in the presence of electromagnetic wave ,
whose electric field is E = 30 j^ sin(1.5 x 10^7t - 5 x 10^-2 x) V/m. The maximum magnetic force experienced by the electron will be (given c = 3 × 10^8 ms–1 and electron charge = 1.6 × 10^–19 C) ,