Physics questions
20027 published questions with worked solutions.
- A 220 volt, 1000 watt bulb is connected across a 110 volt mains supply. The power consumed will be
- The length of a given cylindrical wire is increased by 100%. Due to the consequent decrease in diameter the change in the...
- A thin rectangular magnet suspended freely has a period of oscillation equal to T. Now it is broken into two equal halves (each...Not in JEE Advanced syllabus
- The magnetic lines of force inside a bar magnet
- A particle of mass M and charge Q moving with velocity v describe a circular path of radius R when subjected to a uniform...
- Two coils are placed close to each other. The mutual inductance of the pair of coils depends upon
- When the current changes from +2 A to −2 A in 0.05 second, an e.m.f. of 8 V is induced in a coil. The coefficient of...
- In an oscillating LC circuit the maximum charge on the capacitor is Q. The charge on the capacitor when the energy is stored...
- The core of any transformer is laminated so as to
- A metal wire of linear mass density of 9.8 g/m is stretched with a tension of 10 kg-wt between two rigid supports 1 metre apart....
- The image formed by an objective of a compound microscope is
- To get three images of a single object, one should have two plane mirrors at an angle of
- To demonstrate the phenomenon of interference, we require two sources which emit radiation
- The wavelengths involved in the spectrum of deuterium ( _1^2D ) are slightly different from that of hydrogen spectrum, because
- Which of the following radiations has the least wavelength?
- When a U^ 238 nucleus originally at rest, decays by emitting an alpha particle having a speed ' u ', the recoil speed of the...
- A radioactive sample at any instant has its disintegration rate 5000 disintegrations per minute. After 5 minutes, the rate is...
- A nucleus with Z = 92 emits the following in a sequence: , ^-, ^- , , , , , ^-, ^-, , ^+, ^+, . Then Z of the resulting nucleus is
- Which of the following cannot be emitted by radioactive substances during their decay?
- The difference in the variation of resistance with temperature in a metal and a semiconductor arises essentially due to the...Not in JEE Advanced syllabus