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Electronic configuration of germanium is 2, 8, 18 and 4. To make it extrinsic semiconductor, small quantity of antimony is added. Then
21
Oct
Electronic configuration of germanium is 2, 8, 18 and 4. To make it extrinsic semiconductor, small quantity of antimony is added. Then 18 and 4. To make it extrinsic semiconductor 8 Electronic configuration of germanium is 2 small quantity of antimony is added. Then October 21, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma [...]
A massless non conducting rod AB of length 2l is placed in uniform time varying magnetic field confined in a cylindrical region of radius (R>l) as shown in the figure. The center of the rod coincides with the centre of the cylin- drical region. The rod can freely rotate in the plane of the Figure about an axis coinciding with the axis of the cylinder. Two particles, each of mass m and charge q are attached to the ends A and B of the rod. The time varying magnetic field in this cylindrical region is given by B=B0[1−t2] where B0 is a constant. The field is switched on at time t=0. Consider B0=100T,l=4cmqm=4π100C/kg. Calculate the time in which the rod will reach position CD shown in the figure for th first time. Will end A be at C or D at this instant ?
21
Oct
A massless non conducting rod AB of length 2l is placed in uniform time varying magnetic field confined in a cylindrical region of radius (R>l) as shown in the figure. The center of the rod coincides with the centre of the cylin- drical region. The rod can freely rotate in the plane of the Figure [...]
In case of a semiconductor, which of the following statement is wrong ?
21
Oct
In case of a semiconductor, which of the following statement is wrong ? In case of a semiconductor which of the following statement is wrong ? October 21, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,
A bullet, moving with a speed of 150(m)/(s), strikes a wooden plank. After passing through the plank, its speed becomes 125(m)/(s). Another bullet of the same mass and size strikes the plank with a speed of 90(m)/(s). Its speed after passing through the plank would be
21
Oct
A bullet, moving with a speed of 150(m)/(s), strikes a wooden plank. After passing through the plank, its speed becomes 125(m)/(s). Another bullet of the same mass and size strikes the plank with a speed of 90(m)/(s). Its speed after passing through the plank would be A bullet its speed becomes 125(m)/(s). Another bullet of [...]
A copper wire of length 2 m placed perpendicular to the plane of magnetic field B = (2 i + 4 j ) T. If moves with velocity ( 4 i + 6 j + 8 k ) m/s. Calculate the magnitude of dynamic emf ( in volt ) across its ends.
21
Oct
A copper wire of length 2 m placed perpendicular to the plane of magnetic field B = (2 i + 4 j ) T. If moves with velocity ( 4 i + 6 j + 8 k ) m/s. Calculate the magnitude of dynamic emf ( in volt ) across its ends. have diameters 0.2 [...]
A ball is thrown vertically upward with speed 10m/s and it returns to the ground with speed 8m/s. There exists a constant air resistance. The minimum height attained by the ball will be
21
Oct
A ball is thrown vertically upward with speed 10m/s and it returns to the ground with speed 8m/s. There exists a constant air resistance. The minimum height attained by the ball will be A ball is thrown vertically upward with speed 10m/s and it returns to the ground with speed 8m/s. There exists a constant [...]
A body dropped from a height H reaches the ground with a speed of 1.2 gH−−−√. Calculate the work done by air friction.
21
Oct
A body dropped from a height H reaches the ground with a speed of 1.2 gH−−−√. Calculate the work done by air friction. A body dropped from a height H reaches the ground with a speed of 1.2 gH−−−√. Calculate the work done by air friction. October 21, 2020 Category: Cengage NEET by C.P Singh [...]
A body of mass 1kg is thrown upwards with a velocity 20ms^−1. It momentarily comes to rest after attaining a height of 18m. How much energy is lost due to air friction? (g=10ms^−2)
21
Oct
A body of mass 1kg is thrown upwards with a velocity 20ms^−1. It momentarily comes to rest after attaining a height of 18m. How much energy is lost due to air friction? (g=10ms^−2) A body of mass 1kg is thrown upwards with a velocity 20ms^−1. It momentarily comes to rest after attaining a height of [...]
A small block of mass m is kept on rough inclined surface of inclination θ fixed in an elevator. The elevator goes up with a uniform velocity v and the block does not slide on the wedge. The work done by the force of friction on the block in time t will be
21
Oct
A small block of mass m is kept on rough inclined surface of inclination θ fixed in an elevator. The elevator goes up with a uniform velocity v and the block does not slide on the wedge. The work done by the force of friction on the block in time t will be Work done [...]
A block of mass M is hanging over a smooth and light pulley through a light string. The other end of the string is pulled by a constant force F. If kinetic energy of the block increases by 20J in 1s. Then:
21
Oct
A block of mass M is hanging over a smooth and light pulley through a light string. The other end of the string is pulled by a constant force F. If kinetic energy of the block increases by 20J in 1s. Then: Work done from d = 0 m to d = 3 m October [...]