Physics questions
20027 published questions with worked solutions.
- The maximum and minimum voltage of an amplitude modulated signal are 60 V and 20 V respectively. The percentage modulation index...Not in JEE or NEET syllabus
- An ice cube of dimensions 60 cm 50 cm 20 cm is placed in an insulation box of wall thickness 1 cm. The box keeping the ice cube...
- A transverse wave is represented by y = 2 ( t - kx) cm. The value of wavelength (in cm) for which the wave velocity becomes equal...
- A velocity selector consists of electric field E = E k and magnetic field B = B j with B = 12 mT. The value of E required for an...
- If A = (2 i + 3 j - k ) m and B = ( i + 2 j + 2 k ) m. The magnitude of component of vector A along vector B will be _____ m.
- The radius of gyration of a cylindrical rod about an axis of rotation perpendicular to its length and passing through the center...
- Two lighter nuclei combine to from a comparatively heavier nucleus by the relation given below: ^ 2 _ 1 X + ^ 2 _ 1 X = ^ 4 _ 2...
- A uniform heavy rod of mass 20 kg, cross sectional area 0.4 m^ 2 and length 20 m is hanging from a fixed support. Neglecting the...
- In a coil of resistance 8 , the magnetic flux due to an external magnetic field varies with time as = (2/3)(9 − t^ 2 ). The value...
- A radio can tune to any station in 6 MHz to 10 MHz band. The value of corresponding wavelength bandwidth will be
- The disintegration rate of a certain radioactive sample at any instant is 4250 disintegrations per minute. 10 minutes later, the...
- A parallel beam of light of wavelength 900 nm and intensity 100 Wm^ -2 is incident on a surface perpendicular to the beam. The...
- In Young's double slit experiment, the fringe width is 12 mm. If the entire arrangement is placed in water of refractive index...
- The magnetic field of a plane electromagnetic wave is given by B = 2 10^ -8 (0.5 10^ 3 x + 1.5 10^ 11 t) j T. The amplitude of...
- A charge particle is moving in a uniform field (2 i + 3 j )T. If it has an acceleration of ( i - 4 j ) m/s^ 2 , then the value of...
- The total charge on the system of capacitors C_ 1 = 1 F, C_ 2 = 2 F, C_ 3 = 4 F and C_ 4 = 3 F connected in parallel is : (Assume...
- 7 mol of a certain monoatomic ideal gas undergoes a temperature increase of 40 K at constant pressure. The increase in the...
- A monoatomic gas at pressure P and volume V is suddenly compressed to one eighth of its original volume. The final pressure at...
- A water drop of radius 1 cm is broken into 729 equal droplets. If surface tension of water is 75 dyne/cm, then the gain in...
- The percentage decrease in the weight of a rocket, when taken to a height of 32 km above the surface of earth will be: (Radius of...