Physics questions
20027 published questions with worked solutions.
- In Franck-Hertz experiment, the first dip in the current-voltage graph for hydrogen is observed at 10.2 V. The wavelength of...
- For a given series LCR circuit it is found that maximum current is drawn when value of variable capacitance is 2.5 nF. If...
- A particle moves in a straight line so that its displacement x at any time t is given by x² = 1 + t². Its acceleration at any...
- Three balls of masses 2kg, 4kg and 6kg respectively are arranged at centre of the edges of an equilateral triangle of side 2 m....
- A coil having 100 turns, area of 5 × 10⁻³ m², carrying current of 1 mA is placed in uniform magnetic field of 0.20 T such a way...
- Two coherent monochromatic light beams of intensities I and 4I are superimposed. The difference between maximum and minimum...
- Two open organ pipes of length 60 cm and 90 cm resonate at 6th and 5th harmonics respectively. The difference of frequencies for...
- A particle of mass m with an initial velocity u i collides perfectly elastically with a mass 3m at rest. It moves with a velocity...
- A beam of protons with speed 4 10^5 ms ^ -1 enters a uniform magnetic field of 0.3 T at an angle of 60° to the magnetic field....
- Magnetic materials used for making permanent magnets (P) and magnets in a transformer (T) have different properties of the...Not in JEE Advanced syllabus
- The least count of the main scale of a vernier callipers is 1 mm. Its vernier scale is divided into 10 divisions and coincide...
- The mass density of a spherical galaxy varies as K r over a large distance 'r' from its centre. In that region, a small star is...
- Interference fringes are observed on a screen by illuminating two thin slits 1 mm apart with a light source ( = 632.8 nm). The...
- A plane electromagnetic wave, has frequency of 2.0 10^ 10 Hz and its energy density is 1.02 10^ -8 J/ m ^3 in vacuum. The...
- In a reactor, 2 kg of _ 92 U ^ 235 fuel is fully used up in 30 days. The energy released per fission is 200 MeV. Given that the...
- A gas mixture consists of 3 moles of oxygen and 5 moles of argon at temperature T. Assuming the gases to be ideal and the oxygen...
- If speed V, area A and force F are chosen as fundamental units, then the dimension of Young's modulus will be :
- An amplitude modulated wave is represented by the expression v_m=5(1+0.6 6280t) (211 10^4t) volts. The minimum and maximum...Not in JEE or NEET syllabus
- Two identical strings X and Z made of same material have tension T_X and T_Z in them. It their fundamental frequencies are 450 Hz...
- A 5 capacitor is charged fully by a 220 V supply. It is then disconnected from the supply and is connected in series to another...