JEE Mains Physics 2002-2019 Solved Video Solutions
A coil of inductance 2H having negligible resistance is connected to a source of supply whose voltage is given by V = 3t volt. (where t is in second). If the voltage is applied when t = 0, then the energy stored in the coil after 4s is _____ J.
26
Sep
A coil of inductance 2H having negligible resistance is connected to a source of supply whose voltage is given by V = 3t volt. (where t is in second). If the voltage is applied when t = 0, then the energy stored in the coil after 4s is _____ J. A coil of inductance 2H [...]
512 identical drops of mercury are charged to a potential of 2V each. The drops are joined to form a single drop. The potential of this drop is ____ V.
26
Sep
512 identical drops of mercury are charged to a potential of 2V each. The drops are joined to form a single drop. The potential of this drop is ____ V. 512 identical drops of mercury are charged to a potential of 2V each. The drops are joined to form a single drop. The potential of [...]
The same size images are formed by a convex lens when the object is placed at 20 cm or at 10 cm from the lens. The focal length of convex lens is _____ cm.
26
Sep
The same size images are formed by a convex lens when the object is placed at 20 cm or at 10 cm from the lens. The focal length of convex lens is _____ cm. The same size images are formed by a convex lens when the object is placed at 20 cm or at 10 [...]
In the given circuit of potentiometer, the potential difference E across AB (10m length) is larger than E1 and E2 as well. For key K1 (closed), the jockey is adjusted to touch the wire at point J1 so that there is no deflection in the galvanometer. Now the first battery (E1) is replaced by second battery (E2) for working by making K1 open and K2 closed. The galvanometer gives then null deflection at J2. The value of E1/E2 is a/b, where a = ___.
26
Sep
In the given circuit of potentiometer, the potential difference E across AB (10m length) is larger than E1 and E2 as well. For key K1 (closed), the jockey is adjusted to touch the wire at point J1 so that there is no deflection in the galvanometer. Now the first battery (E1) is replaced by second [...]
A small bob tied at one end of a thin string of length 1m is describing a vertical circle so that the maximum and minimum tension in the string are in the ratio 5 : 1. The velocity of the bob at the height position is _____ m/s. (Take g = 10 m/s^2)
26
Sep
A small bob tied at one end of a thin string of length 1m is describing a vertical circle so that the maximum and minimum tension in the string are in the ratio 5 : 1. The velocity of the bob at the height position is _____ m/s. (Take g = 10 m/s^2) The logic [...]
In a certain thermodynamical process, the pressure of a gas depends on its volume as kV^3. The work done when the temperature changes from 100°C to 300°C will be ___ nR, where n denotes number of moles of a gas.
26
Sep
In a certain thermodynamical process, the pressure of a gas depends on its volume as kV^3. The work done when the temperature changes from 100°C to 300°C will be ___ nR, where n denotes number of moles of a gas. In a certain thermodynamical process the pressure of a gas depends on its volume as [...]
The electric field in a region is given by vector E = 3/5E0 vector i + 4/5E0 vector j N/C. The ratio of flux of reported field through the rectangular surface of area 0.2m^2 (parallel to the Y-Z plane) is a : b, where a = ………
26
Sep
The electric field in a region is given by vector E = 3/5E0 vector i + 4/5E0 vector j N/C. The ratio of flux of reported field through the rectangular surface of area 0.2m^2 (parallel to the Y-Z plane) is a : b, where a = ……… The logic circuit shown above is equivalent to [...]
A transmitting station releases waves of wavelength 960 m. A capacitor of 2.56 μF is used in the resonant circuit. The self inductance of coil necessary for resonance is ____ × 10^–8 H.
26
Sep
A transmitting station releases waves of wavelength 960 m. A capacitor of 2.56 μF is used in the resonant circuit. The self inductance of coil necessary for resonance is ____ × 10^–8 H. A transmitting station releases waves of wavelength 960 m. A capacitor of 2.56 μF is used in the resonant circuit. The self [...]
Two coherent light sources having intensity in the ratio 2x produce an interference pattern. The ratio Imax − Imin / Imax + Imin will be :
26
Sep
Two coherent light sources having intensity in the ratio 2x produce an interference pattern. The ratio Imax − Imin / Imax + Imin will be : Two coherent light sources having intensity in the ratio 2x produce an interference pattern. The ratio Imax − Imin / Imax + Imin will be : September 26, 2021 [...]
Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : The escape velocities of planet A and B are same. But A and B are of unequal mass. Reason R : The product of their mass and radius must be same, M1R1 = M2R2 In the light of the above statements, choose the most appropriate 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 : The escape velocities of planet A and B are same. But A and B are of unequal mass. Reason R : The product of their mass and radius must be same, M1R1 [...]