If c is the velocity of light in free space, the time taken by light to travel
If c is the velocity of light in free space, the time taken by light to travel a distance x…
7 years ago
MP2013
A current of 2 A is made to flow through a coil which has only one turn. The magnetic
A current of 2 A is made to flow through a coil which has only one turn. The magnetic field…
7 years ago
On heating a ferromagnetic substance above curie temperature
On heating a ferromagnetic substance above curie temperature Options (a) becomes paramagnetic (b) becomes diamagnetic (c) remains ferromagnetic with constant…
7 years ago
For having large magnification power of a compound microscope
For having large magnification power of a compound microscope Options (a) length of the microscope tube must be small (b)…
7 years ago
The radius of curvature of the convex face of a plano-convex lens is 12 cm
The radius of curvature of the convex face of a plano-convex lens is 12 cm and the refractive index of…
7 years ago
Two thin lenses of focal lengths f₁ and f₂ are in contact and coaxial.
Two thin lenses of focal lengths f₁ and f₂ are in contact and coaxial. The power of the combination is:…
7 years ago
Electrical force is acting between two charges kept in vacuum. A copper plate
Electrical force is acting between two charges kept in vacuum. A copper plate is placed between the charges, the force…
7 years ago
A point charge q is placed at a distance x/2 directly above the centre of a cube
A point charge q is placed at a distance x/2 directly above the centre of a cube of side x.…
7 years ago
When a p-n junction is reverse biased, then the current through the junction
When a p-n junction is reverse biased, then the current through the junction is mainly due to Options (a) Only…
7 years ago
Maximum kinetic energy of electrons emitted in photoelectric effect increases when
Maximum kinetic energy of electrons emitted in photoelectric effect increases when Options (a) intensity of light is increased (b) light…
7 years ago