Physics questions
20027 published questions with worked solutions.
- An electron is projected with uniform velocity along the axis inside a current carrying long solenoid. Then:
- The electric field in an electromagnetic wave is given by E = i ,40 (t - zc ) NC^ -1 . The magnetic field induction of this wave...
- Which of the following nuclear fragments corresponding to nuclear fission between neutron (^1_0n) and uranium isotope (^ 235 _ 92...
- In an experiment to measure focal length (f) of convex lens, the least counts of the measuring scales for the position of object...
- The resistances of the platinum wire of a platinum resistance thermometer at the ice point and steam point are 8 Ω and 10 Ω...
- A metal wire of uniform mass density having length L and mass M is bent to form a semicircular arc and a particle of mass m is...
- On celsius scale the temperature of a body increases by 40°C. The increase in temperature on Fahrenheit scale is:
- An effective power of a combination of 5 identical convex lenses which are kept in contact along the principal axis is 25 D....
- If a rubber ball falls from a height h and rebounds upto the height of h/2. The percentage loss of total energy of the initial...
- To measure the internal resistance of a battery, potentiometer is used. For R = 10 Ω, the balance point is observed at ℓ = 500 cm...
- The co-ordinates of a particle moving in x-y plane are given by: x = 2 + 4t, y = 3t + 8t^2. The motion of the particle is:
- In an ac circuit, the instantaneous current is zero, when the instantaneous voltage is maximum. In this case, the source may be...
- An infinite plane sheet of charge having uniform surface charge density +σ_s C/m^2 is placed on x-y plane. Another infinitely...
- A alternating current at any instant is given by i = [6 + 56 (100 t + 3 ) ] A. The rms value of the current is ________ A.
- A soap bubble is blown to a diameter of 7 cm. 36960 erg of work is done in blowing it further. If surface tension of soap...
- Two wavelengths λ_1 and λ_2 are used in Young's double slit experiment λ_1 = 450 nm and λ_2 = 650 nm. The minimum order of fringe...
- An elastic spring under tension of 3 N has a length a. Its length is b under tension 2 N. For its length (3a – 2b), the value of...
- Two forces F_1 and F_2 are acting on a body. One force has magnitude thrice that of the other force and the resultant of the two...
- A solid sphere and a hollow cylinder roll up without slipping on same inclined plane with same initial speed v. The sphere and...
- Light emerges out of a convex lens when a source of light kept at its focus. The shape of wavefront of the light is: