Practice Set 1
A bimetallic strip consists of metals A and B. It is mounted rigidly as shown. The metal A has higher coefficient of expansion compared to that of metal B. When the bimetallic strip is placed in a cold both, it will :
28
Sep
A bimetallic strip consists of metals A and B. It is mounted rigidly as shown. The metal A has higher coefficient of expansion compared to that of metal B. When the bimetallic strip is placed in a cold both, it will : Draw the output signal Y in the given combination of gates :- September [...]
In order to determine the Young’s Modulus of a wire of radius 0.2 cm (measured using a scale of least count = 0.001 cm) and length 1m (measured using a scale of least count = 1 mm), a weight of mass 1kg (measured using a scale of least count = 1g) was hanged to get the elongation of 0.5 cm (measured using a scale of least count 0.001 cm). What will be the fractional error in the value of Young’s Modulus determined by this experiment ?
28
Sep
In order to determine the Young’s Modulus of a wire of radius 0.2 cm (measured using a scale of least count = 0.001 cm) and length 1m (measured using a scale of least count = 1 mm), a weight of mass 1kg (measured using a scale of least count = 1g) was hanged to get [...]
The refractive index of a converging lens is 1.4. What will be the focal length of this lens if it is placed in a medium of same refractive index ? (Assume the radii of curvature of the faces of lens are R1 and R2 respectively)
28
Sep
The refractive index of a converging lens is 1.4. What will be the focal length of this lens if it is placed in a medium of same refractive index ? (Assume the radii of curvature of the faces of lens are R1 and R2 respectively) Draw the output signal Y in the given combination of [...]
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 [...]