Physics questions
20027 published questions with worked solutions.
- The electron concentration in an n-type semiconductor is the same as hole concentration in a p-type semiconductor. An external...Not in JEE Advanced syllabus
- A nucleus with mass number 240 breaks into two fragments each of mass number 120, the binding energy per nucleon of unfragmented...
- Two charged spherical conductors of radius R_1 and R_2 are connected by a wire. Then the ratio of surface charge densities of the...
- A spring is stretched by 5 cm by a force 10 N. The time period of the oscillations when a mass of 2 kg is suspended by it is :
- Column-I gives certain physical terms associated with flow of current through a metallic conductor. Column-II gives some...
- Consider the following statements (A) and (B) and identify the correct answer. (A) A zener diode is connected in reverse bias,...Not in JEE Advanced syllabus
- A screw gauge gives the following readings when used to measure the diameter of a wire. Main scale reading : 0 mm; Circular scale...
- A parallel plate capacitor has a uniform electric field E in the space between the plates. If the distance between the plates is...
- An electromagnetic wave of wavelength ' ' is incident on a photosensitive surface of negligible work function. If 'm' mass is of...
- The effective resistance of a parallel connection that consists of four wires of equal length, equal area of cross-section and...
- The number of photons per second on an average emitted by the source of monochromatic light of wavelength 600 nm, when it...
- A step down transformer connected to an ac mains supply of 220 V is made to operate at 11 V, 44 W lamp. Ignoring power losses in...
- A uniform conducting wire of length 12a and resistance 'R' is wound up as a current carrying coil in the shape of, (i) an...
- In the product F=q( v B)=q v (B i+B j+B_0 k). For q=1 and v=2 i+4 j+6 k and F=4 i-20 j+12 k. What will be the complete expression...
- A particle moving in a circle of radius R with a uniform speed takes a time T to complete one revolution. If this particle were...
- A series LCR circuit containing 5.0 H inductor, 80 capacitor and 40 resistor is connected to 230 V variable frequency ac source....
- From a circular ring of mass 'M' and radius 'R' an arc corresponding to a 90° sector is removed. The moment of inertia of the...
- Twenty seven drops of same size are charged at 220 V each. They combine to form a bigger drop. Calculate the potential of the...
- A car starts from rest and accelerates at 5 m/s^2. At t = 4 s, a ball is dropped out of a window by a person sitting in the car....
- A particle of mass 'm' is projected with a velocity v=kV_e (k < 1) from the surface of the earth. (V_e = escape velocity) The...