List of top Physics Questions

In our eye cones identify

Which part of our eye is responsible for image formation?

Object distance (u), image distance (v), focal length (f) are all measured from

A current through a conductor is 2A, when there is a potential difference of 10V between its ends. Its resistance is

\(\frac{\text{Force} \times \text{Length}}{\text{Charge}}=\)which quantity ?

When a person is suffering from both Myopia and Hypermetropia, which should be used ?

With the help of _____eye-lens changes its focal length.

The current in a conductor is directly proportional to the potential difference between its ends. This is called____

Units for specific resistance

A bird is flying down vertically towards the surface of water with constant speed. A fish in the water vertically below the bird sees the bird

The circuit given represents which of the logic operations ?

The number of photons per second on average emitted by the source of monochromatic light of wavelength 600 nm, when it delivers the power of 3.3×10⁻³ watt will be : (h=6.6×10⁻³⁴ Js)

The half-life of a radioactive nuclide is 100 hours. The fraction of original activity that will remain after 150 hours would be

An infinitely long straight conductor carries a current of 5 A as shown. An electron is moving with a speed of 10⁵ m/s parallel to the conductor. The perpendicular distance between the electron and the conductor is 20 cm at an instant. Calculate the magnitude of the force experienced by the electron at that instant

If $E$ and $G$ respectively denote energy and gravitational constant, then $\frac{ E }{ G }$ has the dimensions of:

If force $[ F ]$, acceleration $[ A ]$ and time $[ T ]$ are chosen as the fundamental physical quantities. Find the dimensions of energy.

An object is placed at a certain distance on the principal axis of a concave mirror. If the image distance (v) is 30 cm and radius of curvature (R) of the mirror is 20 cm, find the object distance (u)

If magnification is equal to one, it means

If a light ray passing through centre of curvature (C) of a mirror is incident on the mirror, the reflected ray's path is

When distance between object and screen is more than 4 times the focal length, in how many positions of the convex lens, image is sharp ?

If object and image lie on the same side of a mirror, the mirror is

Focal plane of a spherical mirror is

When a set of parallel rays of light inclined at 15° to the principal axis, are incident on a convex lens, they

To find normal to a curved surface at a point, join that point and

A transistor amplifier along with a tank circuit with positive feedback will act as