Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions)
An ideal choke takes a current of 8A when connected to an a.c. source of 100 volt and 50Hz. A pure resistor under the same conditions takes a current of 10A. If two are connected in series to an a.c. supply of 100V and 40Hz, then the current in the series combination of above resistor and inductor is
25
Aug
An ideal choke takes a current of 8A when connected to an a.c. source of 100 volt and 50Hz. A pure resistor under the same conditions takes a current of 10A. If two are connected in series to an a.c. supply of 100V and 40Hz, then the current in the series combination of above resistor [...]
The coefficient of mutual inductance of the two coils is 0.5 H. If the current is increased from 2 to 3 A ln 0.01 sec. In one of them, then the induced e.m.f. in the second coil is :
25
Aug
The coefficient of mutual inductance of the two coils is 0.5 H. If the current is increased from 2 to 3 A ln 0.01 sec. In one of them, then the induced e.m.f. in the second coil is : The coefficient of mutual inductance of the two coils is 0.5 H. If the current is [...]
An aeroplane take flight from a place towards another place at a distance l in a direction theta north of east in a strong wind of velocity u to the west
25
Aug
An aeroplane take flight from a place towards another place at a distance l in a direction theta north of east in a strong wind of velocity u to the west An aeroplane take flight from a place towards another place at a distance l in a direction theta north of east in a strong [...]
A conducting loop of resistance R and radius r has its center at the origin of the co-ordinate system in a magnetic field of induction B. When it is rotated about Y-axis through 90^(@), net charge flown in the coil is directly proportional to
25
Aug
A conducting loop of resistance R and radius r has its center at the origin of the co-ordinate system in a magnetic field of induction B. When it is rotated about Y-axis through 90^(@), net charge flown in the coil is directly proportional to A conducting loop of resistance R and radius r has its [...]
Shown in the figure is an R-L circuit. Just after the key (K) is closed
25
Aug
Shown in the figure is an R-L circuit. Just after the key (K) is closed Shown in the figure is an R-L circuit. Just after the key (K) is closed August 25, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,
The velocity of water current in a river changes with distance along the perpendicular to the river according to the law u = 2u0 dy for 0 ≤ y ≤ d2 where u0 = velocity in the mid-stream d = width of the river = 2u0d (d − y) for d2 ≤ y ≤ d. A boat travels from a point O on one block of the river to the opposite bank and its steering angle is constantly changed to keep its relative velocity perpendicular to the river current. Calculate the time in which the boat will reach the other bank. The velocity of the boat in still water is u0.
25
Aug
The velocity of water current in a river changes with distance along the perpendicular to the river according to the law u = 2u0 dy for 0 ≤ y ≤ d2 where u0 = velocity in the mid-stream d = width of the river = 2u0d (d − y) for d2 ≤ y ≤ d. [...]
Tags:
A train of length l=350m starts moving rectilinearly with constant acceleration w=3.0⋅10-2m/s2 ,
B decides to overtake A before C does.What minimum acceleration of car B ia required to avoid an accident? ,
both being 1 km ,
car A is travelling with a speed of 36km/h.Two cars B and C approach car A in opposite directions with a speed of 54km/h each. At a certain instant when the distance AB=AC ,
On a two lane road ,
t=30s after the start the locomotive headlight is switched on (event 1) ,
A loop is kept so that its center lies at the origin of the coordinate system. A magnetic field has the induction B pointing along Z axis as shown in the figure
25
Aug
A loop is kept so that its center lies at the origin of the coordinate system. A magnetic field has the induction B pointing along Z axis as shown in the figure A loop is kept so that its center lies at the origin of the coordinate system. A magnetic field has the induction B [...]
A short fired at a moving train (u=30 km/h) at an angle θ= arc sin1/5 with the track enters a compartment of dimension a×b=12m×14m through a corner away form the engine and passes out through the diagonally opposite corner. Calculate the speed of the shot.
25
Aug
A short fired at a moving train (u=30 km/h) at an angle θ= arc sin1/5 with the track enters a compartment of dimension a×b=12m×14m through a corner away form the engine and passes out through the diagonally opposite corner. Calculate the speed of the shot. A train of length l=350m starts moving rectilinearly with constant [...]
Tags:
A train of length l=350m starts moving rectilinearly with constant acceleration w=3.0⋅10-2m/s2 ,
B decides to overtake A before C does.What minimum acceleration of car B ia required to avoid an accident? ,
both being 1 km ,
car A is travelling with a speed of 36km/h.Two cars B and C approach car A in opposite directions with a speed of 54km/h each. At a certain instant when the distance AB=AC ,
On a two lane road ,
t=30s after the start the locomotive headlight is switched on (event 1) ,
A conducting bar is pulled with a constant speed v on a smooth conducting rail. The region has a steady magnetic field of induction B as shown in the figure. If the speed of the bar is doubled then the rate of heat dissipation will
25
Aug
A conducting bar is pulled with a constant speed v on a smooth conducting rail. The region has a steady magnetic field of induction B as shown in the figure. If the speed of the bar is doubled then the rate of heat dissipation will A conducting loop is pulled with a constant velocity towards [...]
A train of length l=350m starts moving rectilinearly with constant acceleration w=3.0⋅10-2m/s2, t=30s after the start the locomotive headlight is switched on (event 1), and τ=60s after that event the tail signal light is switched on (event 2). Find the distance between these events in the reference frames fixed to be train and to the Earth. How and at what constant velocity V relative to the Earth must a certain reference frame K move for the two events to occur in it at the same point?
25
Aug
A train of length l=350m starts moving rectilinearly with constant acceleration w=3.0⋅10-2m/s2, t=30s after the start the locomotive headlight is switched on (event 1), and τ=60s after that event the tail signal light is switched on (event 2). Find the distance between these events in the reference frames fixed to be train and to the [...]
Tags:
A train of length l=350m starts moving rectilinearly with constant acceleration w=3.0⋅10-2m/s2 ,
B decides to overtake A before C does.What minimum acceleration of car B ia required to avoid an accident? ,
both being 1 km ,
car A is travelling with a speed of 36km/h.Two cars B and C approach car A in opposite directions with a speed of 54km/h each. At a certain instant when the distance AB=AC ,
On a two lane road ,
t=30s after the start the locomotive headlight is switched on (event 1) ,