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 [...]
The resistance R = V/I , where V = (50 ± 2)V and I = (20 ± 0.2)A. The percentage error in R is ‘x’ %. The value of ‘x’ to the nearest integer is ……….
28
Sep
The resistance R = V/I , where V = (50 ± 2)V and I = (20 ± 0.2)A. The percentage error in R is ‘x’ %. The value of ‘x’ to the nearest integer is ………. The resistance R = V/i where V = (50 ± 2)V and I = (20 ± 0.2)A. The percentage [...]
In the logic circuit shown in the figure, if input A and B are 0 to 1 respectively, the output at Y would be ‘x’. The value of x is …………
28
Sep
In the logic circuit shown in the figure, if input A and B are 0 to 1 respectively, the output at Y would be ‘x’. The value of x is ………… if input A and B are 0 to 1 respectively In the logic circuit shown in the figure the output at Y would be [...]
A sinusoidal voltage of peak value 250 V is applied to a series LCR circuit, in which R = 8Ω, L = 24 mH and C = 60μF. The value of power dissipated at resonant condition is ‘x’ kW. The value of x to the nearest integer is…………
28
Sep
A sinusoidal voltage of peak value 250 V is applied to a series LCR circuit, in which R = 8Ω, L = 24 mH and C = 60μF. The value of power dissipated at resonant condition is ‘x’ kW. The value of x to the nearest integer is………… A sinusoidal voltage of peak value 250 [...]
The value of power dissipated across the Zener diode (Vz = 15 V) connected in the circuit as shown in the figure is x × 10^–1 watt. The value of x, to the nearest integer, is ………
28
Sep
The value of power dissipated across the Zener diode (Vz = 15 V) connected in the circuit as shown in the figure is x × 10^–1 watt. The value of x, to the nearest integer, is ……… is The value of power dissipated across the Zener diode (Vz = 15 V) connected in the circuit [...]
The first three spectral lines of H-atom in the Balmer series are given λ1 , λ2 , λ3 considering the Bohr atomic model, the wave lengths of first and third spectral lines (λ1/λ2) are related by a factor of approximately ‘x’ × 10^–1. The value of x, to the nearest integer, is …………
28
Sep
The first three spectral lines of H-atom in the Balmer series are given λ1 , λ2 , λ3 considering the Bohr atomic model, the wave lengths of first and third spectral lines (λ1/λ2) are related by a factor of approximately ‘x’ × 10^–1. The value of x, to the nearest integer, is ………… is The [...]
Consider a 20 kg uniform circular disk of radius 0.2 m. It is pin supported at its center and is at rest initially. The disk is acted upon by a constant force F = 20 N through a massless string wrapped around its periphery as shown in the figure. Suppose the disk makes n number of revolutions to attain an angular speed of 50 rad s^–1. The value of n, to the nearest integer, is ……….. [Given : In one complete revolution, the disk rotates by 6.28 rad]
28
Sep
Consider a 20 kg uniform circular disk of radius 0.2 m. It is pin supported at its center and is at rest initially. The disk is acted upon by a constant force F = 20 N through a massless string wrapped around its periphery as shown in the figure. Suppose the disk makes n number [...]
A fringe width of 6 mm was produced for two slits separated by 1 mm apart. The screen is placed 10 m away. The wavelength of light used is ‘x’ nm. The value of ‘x’ to the nearest integer is ……….
28
Sep
A fringe width of 6 mm was produced for two slits separated by 1 mm apart. The screen is placed 10 m away. The wavelength of light used is ‘x’ nm. The value of ‘x’ to the nearest integer is ………. A fringe width of 6 mm was produced for two slits separated by 1 [...]