JEE Mains Physics 2002-2019 Solved Video Solutions
A person of mass M is, sitting on a swing of length L and swinging with an angular amplitude θ0. If the person stands up when the swing passes through its lowest point, the work done by him, assuming that his centre of mass moves by a distance ℓ(ℓ
29
Nov
A person of mass M is, sitting on a swing of length L and swinging with an angular amplitude θ0. If the person stands up when the swing passes through its lowest point, the work done by him, assuming that his centre of mass moves by a distance ℓ(ℓ A person of mass M is [...]
A uniform rod of length ℓ is being rotated in a horizontal plane with a constant angular speed about an axis passing through one of its ends. If the tension generated in the rod due to rotation is T(x) at a distance x from the axis, then which of the following graphs depicts it most closely?
29
Nov
A uniform rod of length ℓ is being rotated in a horizontal plane with a constant angular speed about an axis passing through one of its ends. If the tension generated in the rod due to rotation is T(x) at a distance x from the axis, then which of the following graphs depicts it most [...]
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JEE Mains Physics 2002-2019 Solved Video Solutions
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A ball rests upon a flat piece of paper on a table top. The paper is pulled horizontally but quickly towards right as shown. Relative to its initial position with respect to the table ,
i.e. in the direction in which the paper is pulled. Here ,
i.e. to the left if there is a friction between the paper and the ball. c) moves forward ,
the ball a) remains stationary if there is no friction between the paper and the ball. b) moves to the left and starts rolling backwards ,
the correct statement/s is /are.......... ,
A bob of mass m attached to an inextensible string of length I is suspended from a vertical support. The bob rotates in a horizontal circle with an angular speed ω red/s about the vertical support . About the point of suspension:
29
Nov
A bob of mass m attached to an inextensible string of length I is suspended from a vertical support. The bob rotates in a horizontal circle with an angular speed ω red/s about the vertical support . About the point of suspension: A ball rests upon a flat piece of paper on a table top. [...]
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A ball rests upon a flat piece of paper on a table top. The paper is pulled horizontally but quickly towards right as shown. Relative to its initial position with respect to the table ,
i.e. in the direction in which the paper is pulled. Here ,
i.e. to the left if there is a friction between the paper and the ball. c) moves forward ,
the ball a) remains stationary if there is no friction between the paper and the ball. b) moves to the left and starts rolling backwards ,
the correct statement/s is /are.......... ,
Sodium and copper have work functions 2.3 eV and 4.5 eV respectively. Then, the ratio of the wavelengths is nearest to
29
Nov
Sodium and copper have work functions 2.3 eV and 4.5 eV respectively. Then, the ratio of the wavelengths is nearest to Sodium and copper have work functions 2.3 eV and 4.5 eV respectively. Then the ratio of the wavelengths is nearest to November 29, 2020 Category: Chapter 17 - Dual Nature of Radiation , JEE [...]
Two identical photo cathodes receive light of frequencies f1 and f2. if the velocities of the photoelectrons (of mass m) coming out are respectively v1 and v2, then
29
Nov
Two identical photo cathodes receive light of frequencies f1 and f2. if the velocities of the photoelectrons (of mass m) coming out are respectively v1 and v2, then then Two identical photo cathodes receive light of frequencies f1 and f2. if the velocities of the photoelectrons (of mass m) coming out are respectively v1 and [...]
A charged oil drop is suspended in a uniform field of 3×10^4 V/m so that it neither falls nor rises. The charge on the drop will be (take the mass of the charge =9.9×10^−15kg and g=10m/s^2)
29
Nov
A charged oil drop is suspended in a uniform field of 3×10^4 V/m so that it neither falls nor rises. The charge on the drop will be (take the mass of the charge =9.9×10^−15kg and g=10m/s^2) A charged oil drop is suspended in a uniform field of 3×10^4 V/m so that it neither falls nor [...]
The work function of a substance is 4.0 eV. The longest wavelength of light that can cause photoelectron emission from this substance is approximately
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Nov
The work function of a substance is 4.0 eV. The longest wavelength of light that can cause photoelectron emission from this substance is approximately The work function of a substance is 4.0 eV. The longest wavelength of light that can cause photoelectron emission from this substance is approximately November 29, 2020 Category: Chapter 17 - [...]
According to Einstein’s photoelectric equation, the plot of the kinetic energy of the emitted photo electrons from a metal Vs the frequency, of the incident radiation gives straight line whose slope
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Nov
According to Einstein’s photoelectric equation, the plot of the kinetic energy of the emitted photo electrons from a metal Vs the frequency, of the incident radiation gives straight line whose slope According to Einstein's photoelectric equation of the incident radiation gives straight line whose slope the plot of the kinetic energy of the emitted photo [...]
If the kinetic energy of a free electron doubles, it’s de-Broglie wavelength changes by the factor
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Nov
If the kinetic energy of a free electron doubles, it’s de-Broglie wavelength changes by the factor If the kinetic energy of a free electron doubles it’s de-Broglie wavelength changes by the factor November 29, 2020 Category: Chapter 17 - Dual Nature of Radiation , JEE Mains Physics 2002-2019 Solved Video Solutions ,
A Photocell is illuminated by a small bright source placed 1m away. When the same source of light is placed 1/2m away, the number of electrons emitted by photocathode would :
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Nov
A Photocell is illuminated by a small bright source placed 1m away. When the same source of light is placed 1/2m away, the number of electrons emitted by photocathode would : A Photocell is illuminated by a small bright source placed 1m away. When the same source of light is placed 1/2m away the number [...]