List of top Physics Questions

A Wheatstone network is balanced with respective resisto$ 5Ω. l0Ω. 20 Ω and 40 Ω in tbe P. 0. R and S arms. If a 40 Ω) resisror is connecred across S arm. Then the bridge is again balanced by connecting
The magnitude of tfie drift velocity per unit electric field is defined as
The ratio of the magnitudes of electrostatic force between two protons at a distarce r apart to that between two electrons at the same distance of separation is
An air capacitor and identical capacitor filled with dielectric medium of dielectric constant 5 are connected in series to a voltage source of 12V. The fall of potential across $C_1$ and $C_2$ are respectively
The electric potential at a point at a distance r due to an eclectic dipole is proportional to
When two sound waves of slightly different ftequencies $f_1$ and $f_2$ are sounded together, then the time interval between successive maxima is
The device used to measure the potential difference or electromotive force is
Pick the false statement on the metallic conductors.
Which of the following materials obeys the Ohm's law?
An amount of charge passing through any cross-section of the conductor in 1 second is called
The human eye functions on the principle of sensation of
The distance between the focal point and the optic centre gives the
A lens is made up of
If i and r are the angle of incidence and angle of refraction, then the equation for the Snell's law is
If x and y are the temperatures of the hot and cold water samples respectively and z is the final temperature of their mixture, then
The magnetic flux passing through a unit area perpendicular to the field is called
The development of electromagnetism lead to the invention of
The SI units of magnetic flux and magnetic flux density respectively are
For the children below the age of 10 years, the value of least distance of distinct vision is about
Dioptre is the unit of
A person cannot see the objects placed between near point and the point of least distance of distinct vision. His defect of vision can be corrected by using
For a healthy eye, the accommodation of eye lens will be in the range of
The defect of vision in which the people cannot see the objects beyond far point is called
The materials which are useful in making of diodes, transistors and integrated chips (ICs) etc. are
A current of 1·5 A passes through a conductor of resistance 20Ω. The potential difference across it is