Question Answers
Sahay Sir > Question Answers
In meter bridge or wheat stone bridge for mmeasurement of resistance, the known and the unknown resistances are interchanged. The error so removed is
20
Sep
In meter bridge or wheat stone bridge for mmeasurement of resistance, the known and the unknown resistances are interchanged. The error so removed is In meter bridge or wheat stone bridge for mmeasurement of resistance the known and the unknown resistances are interchanged. The error so removed is September 20, 2020 Category: Uncategorised (JEE Advanced [...]
A star 2.5 times the mass of the sun and collapsed to a size of the 12km rotates with a speed of 1.5 rev per second. (Extremely compact stars of this kind are known as neutron stars. Certain observed stellar objects called pulsars are believed to belong this category ). Will an object placed on its equator remain struck to its surface due to gravity ? (Mass of the sun =2×10^30kg).
20
Sep
A star 2.5 times the mass of the sun and collapsed to a size of the 12km rotates with a speed of 1.5 rev per second. (Extremely compact stars of this kind are known as neutron stars. Certain observed stellar objects called pulsars are believed to belong this category ). Will an object placed on [...]
What are the advantages of the null point method in a wheat stone bridge ? what additional measurement would be required to calculate R unknown by any other method ?
20
Sep
What are the advantages of the null point method in a wheat stone bridge ? what additional measurement would be required to calculate R unknown by any other method ? What are the advantages of the null point method in a wheat stone bridge ? what additional measurement would be required to calculate R unknown [...]
As you have learnt in the text, a geostationary satellite orbits the earth at a height of nearly 36,000 km from the surface of the earth. What is the potential due to earth’s gravity at the site of this satellite? (Take the potential energy at infinity to be zero). Mass of the earth = 6.0 × 10^24 kg, radius = 6400
20
Sep
As you have learnt in the text, a geostationary satellite orbits the earth at a height of nearly 36,000 km from the surface of the earth. What is the potential due to earth’s gravity at the site of this satellite? (Take the potential energy at infinity to be zero). Mass of the earth = 6.0 [...]
Tags:
000 km from the surface of the earth. What is the potential due to earth’s gravity at the site of this satellite? (Take the potential energy at infinity to be zero). Mass of the earth = 6.0 × 10^24 kg ,
a geostationary satellite orbits the earth at a height of nearly 36 ,
As you have learnt in the text ,
radius = 6400 ,
Two heavy spheres each of mass 100 kg and radius 0.10 m are placed 1.0 m apart on a horizontal table. What is the gravitational force and potential at the mid point of the line joining the centers of the spheres? Is an object placed at that point in equilibrium? If so, is the equilibrium stable or unstable?
20
Sep
Two heavy spheres each of mass 100 kg and radius 0.10 m are placed 1.0 m apart on a horizontal table. What is the gravitational force and potential at the mid point of the line joining the centers of the spheres? Is an object placed at that point in equilibrium? If so, is the equilibrium [...]
Potentiometer wire of length 1 m is connected in series with 490 ohm resistance and 2 V battery. If 0.2 mV/cm is the potential gradient, then resistance of the potentiometer wire is
20
Sep
Potentiometer wire of length 1 m is connected in series with 490 ohm resistance and 2 V battery. If 0.2 mV/cm is the potential gradient, then resistance of the potentiometer wire is Potentiometer wire of length 1 m is connected in series with 490 ohm resistance and 2 V battery. If 0.2 mV/cm is the [...]
Two starts each of one solar mass (=2×10^30kg) are approaching each other for a head on collision. When they are a distance 109km. their speeds are negligible. What is the speed with which they collide? The radius of each star is 10^4km. Assume the stars to remain undistorted until they collide. (Use the known value of G).
20
Sep
Two starts each of one solar mass (=2×10^30kg) are approaching each other for a head on collision. When they are a distance 109km. their speeds are negligible. What is the speed with which they collide? The radius of each star is 10^4km. Assume the stars to remain undistorted until they collide. (Use the known value [...]
A satellite orbits the earth at a height of 400 km above the surface. How much energy must be expended to rocket the satellite out of the earth’s gravitational influence? Mass of the satellite =200 kg; mass of the earth =6. 0×10^24 kg; radius of the earth =6.4 x 10^6 m, G = 6.67 x 10^11 N-m^2/Kg^2.
20
Sep
A satellite orbits the earth at a height of 400 km above the surface. How much energy must be expended to rocket the satellite out of the earth’s gravitational influence? Mass of the satellite =200 kg; mass of the earth =6. 0×10^24 kg; radius of the earth =6.4 x 10^6 m, G = 6.67 x [...]
The length of a wire of a potentiometer is 100 cm, and the e.m.f. of its standard cell is E volt. It is employed to measure the e.m.f. of a battery whose internal resistance is 0.5Ω. If the balance point is obtained at I = 30 cm from the positive end, the e.m.f. of the battery is . where i is the current in the potentiometer wire.
20
Sep
The length of a wire of a potentiometer is 100 cm, and the e.m.f. of its standard cell is E volt. It is employed to measure the e.m.f. of a battery whose internal resistance is 0.5Ω. If the balance point is obtained at I = 30 cm from the positive end, the e.m.f. of the [...]
Tags:
and the e.m.f. of its standard cell is E volt. It is employed to measure the e.m.f. of a battery whose internal resistance is 0.5Ω. If the balance point is obtained at I = 30 cm from the positive end ,
the e.m.f. of the battery is . where i is the current in the potentiometer wire. ,
The length of a wire of a potentiometer is 100 cm ,
The escape speed of a projectile on the earth’s surface is 11.2 km `s^(-1)`. A body is projected out with thrice this speed. What is the speed of the body far away from the earth? Ignore the presence of the sun and other planets.
20
Sep
The escape speed of a projectile on the earth’s surface is 11.2 km `s^(-1)`. A body is projected out with thrice this speed. What is the speed of the body far away from the earth? Ignore the presence of the sun and other planets. How will you 'weigh the sun' that is estimate its mass? [...]