Physics questions
20027 published questions with worked solutions.
- Potential energy as a function of r is given by U = A/r^ 10 - B/r^ 5 , where r is the interatomic distance, A and B are positive...
- A fly wheel is accelerated uniformly from rest and rotates through 5 rad in the first second. The angle rotated by the fly wheel...
- A 100 g of iron nail is hit by a 1.5 kg hammer striking at a velocity of 60 ms^ -1 . What will be the rise in the temperature of...
- If the charge on a capacitor is increased by 2 C, the energy stored in it increases by 44%. The original charge on the capacitor...
- An electric bulb is rated as 200 W. What will be the peak magnetic field at 4 m distance produced by the radiations coming from...
- A body is projected from the ground at an angle of 45° with the horizontal. Its velocity after 2 s is 20 ms^ -1 . The maximum...
- Two travelling waves of equal amplitudes and equal frequencies move in opposite directions along a string. They interfere to...
- A sample contains 10^ -2 kg each of two substances A and B with half lives 4 s and 8 s respectively. The ratio of their atomic...
- A ray of light is incident at an angle of incidence 60° on the glass slab of refractive index 3 . After refraction, the light ray...
- A circular coil of 1000 turns each with area 1 m^ 2 is rotated about its vertical diameter at the rate of one revolution per...
- A monoatomic gas performs a work of Q/4 where Q is the heat supplied to it. The molar heat capacity of the gas will be _____ R...
- In AM modulation, a signal is modulated on a carrier wave such that maximum and minimum amplitudes are found to be 6 V and 2 V...Not in JEE or NEET syllabus
- The electric current in a circular coil of 2 turns produces a magnetic induction B_ 1 at its centre. The coil is unwound and is...
- A drop of liquid of density is floating half immersed in a liquid of density and surface tension 7.5 10^ -4 N cm^ -1 . The radius...
- Two billiard balls of mass 0.05 kg each moving in opposite directions with 10 ms^ -1 collide and rebound with the same speed. If...
- For an object placed at a distance 2.4 m from a lens, a sharp focused image is observed on a screen placed at a distance 12 cm...
- Light wave traveling in air along x-direction is given by E_y = 540 sin 10^ 4 (x − ct) Vm^ -1 . Then, the peak value of magnetic...
- An electron with energy 0.1 keV moves at right angle to the earth's magnetic field of 1 10^ -4 Wbm^ -2 . The frequency of...
- The length of a seconds pendulum at a height h = 2R from earth surface will be (Given R = Radius of earth and acceleration due to...
- Sound travels in a mixture of two moles of helium and n moles of hydrogen. If rms speed of gas molecules in the mixture is 2...