JEE Mains Physics 2002-2019 Solved Video Solutions
When the temperature of a metal wire is increased from 0°C to 10°C, its length increases by 0.02%. The percentage change in its mass density will be closest to
18
Sep
When the temperature of a metal wire is increased from 0°C to 10°C, its length increases by 0.02%. The percentage change in its mass density will be closest to its length increases by 0.02%. The percentage change in its mass density will be closest to When the temperature of a metal wire is increased from [...]
If momentum (P), area (A) and time (T) are taken to be the fundamental quantities then the dimensional formula for energy is
18
Sep
If momentum (P), area (A) and time (T) are taken to be the fundamental quantities then the dimensional formula for energy is area (A) and time (T) are taken to be the fundamental quantities then the dimensional formula for energy is If momentum (P) September 18, 2021 Category: JEE Mains Physics 2002-2019 Solved Video Solutions [...]
The figure shows a region of length ‘l’ with a uniform magnetic field of 0.3 T in it and a proton entering the region with velocity 4 × 10^5 ms^–1 making an angle 60° with the field. If the proton completes 10 revolution by the time it cross the region shown, ‘l’ is close to (mass of proton = 1.67 × 10^–27 kg, charge of the proton = 1.6 × 10^–19C)
18
Sep
The figure shows a region of length ‘l’ with a uniform magnetic field of 0.3 T in it and a proton entering the region with velocity 4 × 10^5 ms^–1 making an angle 60° with the field. If the proton completes 10 revolution by the time it cross the region shown, ‘l’ is close to [...]
The height ‘h’ at which the weight of a body will be the same as that at the same depth ‘h’ from the surface of the earth is (Radius of the earth is R and effect of the rotation of the earth is neglected)
18
Sep
The height ‘h’ at which the weight of a body will be the same as that at the same depth ‘h’ from the surface of the earth is (Radius of the earth is R and effect of the rotation of the earth is neglected) area A and force F are chosen as fundamental units If [...]
An inductance coil has a reactance of 100 Ω. When ac signal of frequency 1000 Hz is applied to the coil, the applied voltage leads the current by 45°. Calculate the self-inductance of the coil.
16
Sep
An inductance coil has a reactance of 100 Ω. When ac signal of frequency 1000 Hz is applied to the coil, the applied voltage leads the current by 45°. Calculate the self-inductance of the coil. An inductance coil has a reactance of 100 Ω. When ac signal of frequency 1000 Hz is applied to the [...]
A capillary tube made of glass of radius 0.15mm is dipped vertically in a beaker filled with methylene iodide which rises to height h in the tube. It is observed that the two tangents drawn from liquid-glass interfaces (from opp. sides of the capillary) make an angle of 60∘ with one another. Then h is close to (surface tension =0.05 Nm^−1 density =667 kgm^−3 )(g=10ms^−2)
16
Sep
A capillary tube made of glass of radius 0.15mm is dipped vertically in a beaker filled with methylene iodide which rises to height h in the tube. It is observed that the two tangents drawn from liquid-glass interfaces (from opp. sides of the capillary) make an angle of 60∘ with one another. Then h is [...]
A 5μF capacitor is charged fully by a 220 V supply. It is then disconnected from the supply and is connected in series to another uncharged 2.5μF capacitor. If the energy change during the charge redistribution is X/100 J 100 then value of X to the nearest integer is ……
16
Sep
A 5μF capacitor is charged fully by a 220 V supply. It is then disconnected from the supply and is connected in series to another uncharged 2.5μF capacitor. If the energy change during the charge redistribution is X/100 J 100 then value of X to the nearest integer is …… area A and force F [...]
A circular coil of radius 10 cm is placed in a uniform magnetic field of 3.0 × 10^–5 T with its plane perpendicular to the field initially. It is rotated at constant angular speed about an axis along the diameter of coil and perpendicular to magnetic field so that it undergoes half of rotation in 0.2 s. The maximum value of EMF induced (in μV) in the coil will be close to the integer …..
16
Sep
A circular coil of radius 10 cm is placed in a uniform magnetic field of 3.0 × 10^–5 T with its plane perpendicular to the field initially. It is rotated at constant angular speed about an axis along the diameter of coil and perpendicular to magnetic field so that it undergoes half of rotation in [...]
A small block starts slipping down from a point B on an inclined plane AB, which is making an angle θ with the horizontal section BC is smooth and the remaining section CA is rough with a coefficient of friction μ . It is found that the block comes to rest as it reaches the bottom (point A) of the inclined plane. If BC = 2AC, the coefficient of friction is given by μ = k tanθ. The value of k is ……
16
Sep
A small block starts slipping down from a point B on an inclined plane AB, which is making an angle θ with the horizontal section BC is smooth and the remaining section CA is rough with a coefficient of friction μ . It is found that the block comes to rest as it reaches the [...]
When radiation of wavelength λ is used to illuminate a metallic surface, the stopping potential is V. When the same surface is illuminated with radiation of wavelength 3λ, the stopping potential is V/4 . If the threshold wavelength for the metallic surface is n lamba then value of n will be ……….
16
Sep
When radiation of wavelength λ is used to illuminate a metallic surface, the stopping potential is V. When the same surface is illuminated with radiation of wavelength 3λ, the stopping potential is V/4 . If the threshold wavelength for the metallic surface is n lamba then value of n will be ………. the stopping potential [...]
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the stopping potential is V. When the same surface is illuminated with radiation of wavelength 3λ ,
the stopping potential is V/4 . If the threshold wavelength for the metallic surface is n lamba then value of n will be .......... ,
When radiation of wavelength λ is used to illuminate a metallic surface ,