List of top Physics Questions

Formula used when a light ray enters a medium of refractive index n2 from a medium of refractive index n1 at curved surface with radius of curvature R is
Conductivity =
\(4 \Omega, 8 \Omega, R\) resistors are connected in series. Resultant resistance is \(20 \Omega\). Then \(R=?\)
When how much current flows in the fuse, it melts ?
The resistance of human body varies between
Least distance of distinct vision is_____
The alloy made of Cu, Mn, Ni is
When a person is suffering from both Myopia and Hypermetropia, which should be used ?
In our eye cones identify
Object distance (u), image distance (v), focal length (f) are all measured from
Which part of our eye is responsible for image formation?
\(\frac{\text{Force} \times \text{Length}}{\text{Charge}}=\)which quantity ?
With the help of _____eye-lens changes its focal length.
When a copper wire is connected to a battery the electric field in the wire is
The current in a conductor is directly proportional to the potential difference between its ends. This is called____
A current through a conductor is 2A, when there is a potential difference of 10V between its ends. Its resistance is
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 ?
Logic gate operation
A small block slides down on a smooth inclined plane, starting from rest at time t=0. Let Sn be the distance traveled by the block in the interval t=n−1 to t=n. Then, the ratio \(\frac{S_n}{S_{(n+1)}}\)
The total capacity of the system of capacitors shown in the adjoining figure between the points A and B is
Total capacity of the system of capacitors
The electron concentration in an n-type semiconductor is the same as the hole concentration in a p-type semiconductor. An external field (electric) is applied across each of them. Compare the currents in them
Consider the following statements (A) and (B) and identify the correct answer. 
(A) A zener diode is connected in reverse bias when used as a voltage regulator. 
(B) The potential barrier of the p-n junction lies between 0.1 V to 0.3 V.
For the given circuit, the input digital signals are applied at the terminals A, B and C. What would be the output at the terminal y?
input digital signals are applied at the terminals
Twenty seven drops of same size are charged at $220\, V$ each. They combine to form a bigger drop. Calculate the potential of the bigger drop.