JEE Mains Physics 2002-2019 Solved Video Solutions
Calculate the value of mean free path (λ) for oxygen molecules at temperature 27°C and pressure 1.01 × 10^5 Pa. Assume the molecular diameter 0.3 nm and the gas is ideal. (k = 1.38 × 10^–23 JK^–1)
28
Sep
Calculate the value of mean free path (λ) for oxygen molecules at temperature 27°C and pressure 1.01 × 10^5 Pa. Assume the molecular diameter 0.3 nm and the gas is ideal. (k = 1.38 × 10^–23 JK^–1) Calculate the value of mean free path (λ) for oxygen molecules at temperature 27°C and pressure 1.01 × [...]
A ball of mass 10 kg moving with a velocity 10√3 ms^–1 along the X-axis, hits another ball of mass 20 kg which is at rest. After the collision, the first ball comes to rest and the second one disintegrates into two equal pieces. One of the pieces starts moving along the Y-axis at a speed of 10 m/s. The second piece starts moving at a speed of 20 m/s at an angle θ (degree) with respect to the X-axis. The configuration of pieces after the collision is shown in the figure. The value of θ to the nearest integer is ________.
28
Sep
A ball of mass 10 kg moving with a velocity 10√3 ms^–1 along the X-axis, hits another ball of mass 20 kg which is at rest. After the collision, the first ball comes to rest and the second one disintegrates into two equal pieces. One of the pieces starts moving along the Y-axis at a [...]
The half-life of Au^198 is 2.7 days. The activity of 1.50 mg of Au^198 if its atomic weight is 198 g mol^–1 is, (NA = 6 × 10^23/mol)
28
Sep
The half-life of Au^198 is 2.7 days. The activity of 1.50 mg of Au^198 if its atomic weight is 198 g mol^–1 is, (NA = 6 × 10^23/mol) (NA = 6 × 10^23/mol) The half-life of Au^198 is 2.7 days. The activity of 1.50 mg of Au^198 if its atomic weight is 198 g mol^–1 [...]
For a given circuit, comment on a type of transformer used :
28
Sep
For a given circuit, comment on a type of transformer used : comment on a type of transformer used : For a given circuit September 28, 2021 Category: JEE Mains Physics 2002-2019 Solved Video Solutions , Practice Set 1 ,
The de-Broglie wavelength associated with an electron and a proton were calculated by accelerating them through same potential of 100 V. What should nearly be the ratio of their wavelengths? (mP = 1.00727 u, me = 0.00055u)
28
Sep
The de-Broglie wavelength associated with an electron and a proton were calculated by accelerating them through same potential of 100 V. What should nearly be the ratio of their wavelengths? (mP = 1.00727 u, me = 0.00055u) Draw the output signal Y in the given combination of gates :- September 28, 2021 Category: JEE Mains [...]
A mosquito is moving with a velocity V→ = 0.5t^2i^ + 3tj^ + 9k^ m/s and accelerating in uniform conditions. What will be the direction of mosquito after 2s ?
28
Sep
A mosquito is moving with a velocity V→ = 0.5t^2i^ + 3tj^ + 9k^ m/s and accelerating in uniform conditions. What will be the direction of mosquito after 2s ? A mosquito is moving with a velocity V→ = 0.5t^2i^ + 3tj^ + 9k^ m/s and accelerating in uniform conditions. What will be the direction [...]
A charge Q is moving dI→ distance in the magnetic field B→. Find the value of work done by B→.
28
Sep
A charge Q is moving dI→ distance in the magnetic field B→. Find the value of work done by B→. A charge Q is moving dI→ distance in the magnetic field B→. Find the value of work done by B→. September 28, 2021 Category: JEE Mains Physics 2002-2019 Solved Video Solutions , Practice Set 1 [...]
A large block of wood of mass M = 5.99 kg is hanging from two long massless cords. A bullet of mass m = 10 g is fired into the block and gets embedded in it. The (block + bullet) then swing upwards, their centre of mass rising a vertical distance h = 9.8 cm before the (block + bullet) pendulum comes momentarily to rest at the end of its arc. The speed of the bullet just before collision is : (Take g = 9.8 ms^–2)
28
Sep
A large block of wood of mass M = 5.99 kg is hanging from two long massless cords. A bullet of mass m = 10 g is fired into the block and gets embedded in it. The (block + bullet) then swing upwards, their centre of mass rising a vertical distance h = 9.8 cm [...]
The following logic gate is equivalent to :
28
Sep
The following logic gate is equivalent to : The following logic gate is equivalent to : September 28, 2021 Category: JEE Mains Physics 2002-2019 Solved Video Solutions , Practice Set 1 ,
Consider a frame that is made up of two thin massless rods AB and AC as shown in the figure. A vertical force P→ of magnitude 100 N is applied at point A of the frame. Suppose the force is P→ resolved parallel to the arms AB and AC of the frame. The magnitude of the resolved component along the arm AC is xN. The value of x, to the nearest integer, is ……….
28
Sep
Consider a frame that is made up of two thin massless rods AB and AC as shown in the figure. A vertical force P→ of magnitude 100 N is applied at point A of the frame. Suppose the force is P→ resolved parallel to the arms AB and AC of the frame. The magnitude of [...]