Physics questions
20027 published questions with worked solutions.
- When temperature increases, the frequency of a tuning fork
- On moving a charge of 20 coulombs by 2 cm, 2 J of work is done, then the potential difference between the points is
- If a charge q is placed at the centre of the line joining two equal charges Q such that the system is in equilibrium then the...
- If there are n capacitors in parallel connected to V volt source, then the energy stored is equal to
- Capacitance (in F) of a spherical conductor with radius 1 m is
- A wire when connected to 220 V mains supply has power dissipation P_1. Now the wire is cut into two equal pieces which are...
- If a current is passed through a spring then the spring will
- If in a circular coil A of radius R, current I is flowing and in another coil B of radius 2R a current 2I is flowing, then the...
- If an electron and a proton having same momenta enter perpendicular to a magnetic field, then
- The time period of a charged particle undergoing a circular motion in a uniform magnetic field is independent of its
- The power factor of an AC circuit having resistance (R) and inductance (L) connected in series and an angular velocity is
- In a transformer, number of turns in the primary coil are 140 and that in the secondary coil are 280. If current in primary coil...
- Electromagnetic waves are transverse in nature is evident by
- Infra red radiation is detected by
- Which of the following are not electromagnetic waves?
- If two mirrors are kept at 60^ to each other, then the number of images formed by them is
- Which of the following is used in optical fibres ?
- At a specific instant emission of radioactive compound is deflected in a magnetic field. The compound can emit (i) electrons (ii)...
- If N_0 is the original mass of the substance of half- life period t_ 1/2 = 5 years, then the amount of substance left after 15...
- If mass-energy equivalence is taken into account, when water is cooled to form ice, the mass of water should