Physics questions
20027 published questions with worked solutions.
- The total number of turns and cross-section area in a solenoid is fixed. However, its length L is varied by adjusting the...
- A concave mirror for face viewing has focal length of 0.4 m. The distance at which you hold the mirror from your face in order to...
- A capacitor with capacitance 5 μF is charged to 5 μC. If the plates are pulled apart to reduce the capacitance to 2 μF, how much...
- A simple pendulum oscillating in air has period T. The bob of the pendulum is completely immersed in a non-viscous liquid. The...
- A body of mass 2 kg makes an elastic collision with a second body at rest and continues to move in the original direction but...
- A signal A cos ωt is transmitted using _0 _0t as carrier wave. The correct amplitude modulated (AM) signal is:Not in JEE or NEET syllabus
- A string is clamped at both the ends and it is vibrating in its 4th harmonic. The equation of the stationary wave is Y = 0.3...
- In the formula X = 5YZ^2, X and Z have dimensions of capacitance and magnetic field, respectively. What are the dimensions of Y...
- In free space, a particle A of charge 1 μC is held fixed at a point P. Another particle B of the same charge and mass 4 μg is...
- A bullet of mass 20 g has an initial speed of 1 ms^ -1 , just before it starts penetrating a mud wall of thickness 20 cm. If the...
- A coil of self inductance 10 mH and resistance 0.1 Ω is connected through a switch to a battery of internal resistance 0.9 Ω....
- Water from a tap emerges vertically downwards with an initial speed of 1.0 ms^ -1 . The cross-sectional area of the tap is 10^ -4...
- A submarine experiences a pressure of 5.05 10^ 6 Pa at a depth of d_1 in a sea. When it goes further to a depth of d_2, it...
- Two radioactive substances A and B have decay constants 5λ and λ respectively. At t = 0, a sample has the same number of the two...
- A spaceship orbits around a planet at a height of 20 km from its surface. Assuming that only gravitational field of the planet...
- A source of sound S is moving with a velocity of 50 m/s towards a stationary observer. The observer measures the frequency of the...
- A solid sphere of mass M and radius R is divided into two unequal parts. The first part has a mass of 7M 8 and is converted into...
- Light is incident normally on a completely absorbing surface with an energy flux of 25 W cm^ -2 . If the surface has an area of...
- The magnitude of the magnetic field at the centre of an equilateral triangular loop of side 1 m which is carrying a current of 10...
- The time dependence of the position of a particle of mass m = 2 is given by r(t) = 2t , i - 3t^2 , j. Its angular momentum, with...