JEE Mains Physics 2002-2019 Solved Video Solutions
Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : An electron microscope can achieve better resolving power than an optical microscope. Reason R : The de Broglie’s wavelength of the electrons emitted from an electron gun is much less than wavelength of visible light. In the light of the above statements, choose the correct answer from the options given below:
26
Sep
Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : An electron microscope can achieve better resolving power than an optical microscope. Reason R : The de Broglie’s wavelength of the electrons emitted from an electron gun is much less than wavelength [...]
The temperature θ at the junction of two insulating sheets, having thermal resistances R1 and R2 as well as top and bottom temperatures θ1 and θ2 (as shown in figure) is given by :
26
Sep
The temperature θ at the junction of two insulating sheets, having thermal resistances R1 and R2 as well as top and bottom temperatures θ1 and θ2 (as shown in figure) is given by : having thermal resistances R1 and R2 as well as top and bottom temperatures θ1 and θ2 (as shown in figure) is [...]
If two similar springs each of spring constant K1 are joined in series, the new spring constant and time period would be changed by a factor :
26
Sep
If two similar springs each of spring constant K1 are joined in series, the new spring constant and time period would be changed by a factor : If two similar springs each of spring constant K1 are joined in series the new spring constant and time period would be changed by a factor : September [...]
In a Young’s double slit experiment two slits are separated by 2 mm and the screen is placed one meter away. When a light of wavelength 500 nm is used, the fringe separation will be:
26
Sep
In a Young’s double slit experiment two slits are separated by 2 mm and the screen is placed one meter away. When a light of wavelength 500 nm is used, the fringe separation will be: In a Young's double slit experiment two slits are separated by 2 mm and the screen is placed one meter [...]
Four identical solid spheres each of mass ‘m’ and radius ‘a’ are placed with their centres on the four corners of a square of side ‘b’. The moment of inertia of the system about one side of square where the axis of rotation is parallel to the plane of the square is :
26
Sep
Four identical solid spheres each of mass ‘m’ and radius ‘a’ are placed with their centres on the four corners of a square of side ‘b’. The moment of inertia of the system about one side of square where the axis of rotation is parallel to the plane of the square is : The logic [...]
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: Body ‘P’ having mass M moving with speed ‘u’ has head-on collision elastically with another body ‘Q’ having mass ‘m’ initially at rest. If m
26
Sep
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: Body ‘P’ having mass M moving with speed ‘u’ has head-on collision elastically with another body ‘Q’ having mass ‘m’ initially at rest. If m The logic circuit shown above is equivalent to : [...]
A planet revolving in elliptical orbit has : (A) a constant velocity of revolution. (B) has the least velocity when it is nearest to the sun. (C) its areal velocity is directly proportional to its velocity. (D) areal velocity is inversely proportional to its velocity. (E) to follow a trajectory such that the areal velocity is constant. Choose the correct answer from the options given below :
26
Sep
A planet revolving in elliptical orbit has : (A) a constant velocity of revolution. (B) has the least velocity when it is nearest to the sun. (C) its areal velocity is directly proportional to its velocity. (D) areal velocity is inversely proportional to its velocity. (E) to follow a trajectory such that the areal velocity [...]
A particle is moving with uniform speed along the circumference of a circle of radius R under the action of a central fictitious force F which is inversely proportional to R3. Its time period of revolution will be given by :
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Sep
A particle is moving with uniform speed along the circumference of a circle of radius R under the action of a central fictitious force F which is inversely proportional to R3. Its time period of revolution will be given by : The logic circuit shown above is equivalent to : September 26, 2021 Category: JEE [...]
The normal density of a material is ρ and its bulk modulus of elasticity is K. The magnitude of increase in density of material, when a pressure P is applied uniformly on all sides, will be :
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Sep
The normal density of a material is ρ and its bulk modulus of elasticity is K. The magnitude of increase in density of material, when a pressure P is applied uniformly on all sides, will be : The normal density of a material is ρ and its bulk modulus of elasticity is K. The magnitude [...]
An alternating current is given by the equation i = i1 sinωt + i2 cosωt. The rms current will be
26
Sep
An alternating current is given by the equation i = i1 sinωt + i2 cosωt. The rms current will be An alternating current is given by the equation i = i1 sinωt + i2 cosωt. The rms current will be September 26, 2021 Category: JEE Mains Physics 2002-2019 Solved Video Solutions , Practice Set 1 [...]