Physics questions
20027 published questions with worked solutions.
- A string of area of cross-section 4 mm^ 2 and length 0.5 m is connected with a rigid body of mass 2 kg. The body is rotated in a...
- At a certain temperature, the degrees of freedom per molecule for gas is 8. The gas performs 150 J of work when it expands under...
- The potential energy of a particle of mass 4 kg in motion along the x-axis is given by U = 4(1 − cos 4x) J. The time period of...
- An electrical bulb rated 220 V, 100 W, is connected in series with another bulb rated 220 V, 60 W. If the voltage across...
- In an experiment with a convex lens, the plot of the image distance (v') against the object distance (u') measured from the focus...
- In an experiment to find acceleration due to gravity (g) using simple pendulum, time period of 0.5 s is measured from time of 100...
- The dimensions of (B^ 2 / _ 0 ) will be – (if _ 0 : permeability of free space and B : magnetic field)
- A NCC parade is going at a uniform speed of 9 km/h under a mango tree on which a monkey is sitting at a height of 19.6 m. At any...
- A balloon has mass of 10 g in air. The air escapes from the balloon at a uniform rate with velocity 4.5 cm/s. If the balloon...
- If the radius of earth shrinks by 2% while its mass remains same. The acceleration due to gravity on the earth's surface will...
- The force required to stretch a wire of cross-section 1 cm^ 2 to double its length will be: (Given Young's modulus of the wire =...
- A Carnot engine has efficiency of 50%. If the temperature of sink is reduced by 40°C, its efficiency increases by 30%. The...
- Given below are two statements : Statement I : The average momentum of a molecule in a sample of an ideal gas depends on...
- In the wave equation y = 0.5 ((2 / )(400t - x)) m, the velocity of the wave will be :
- Two capacitors, each having capacitance 40 F are connected in series. The space between one of the capacitors is filled with...
- The current sensitivity of a galvanometer can be increased by : (A) Decreasing the number of turns (B) Increasing the magnetic...
- In normal adjustment, for a refracting telescope, the distance between objective and eye piece is 30 cm. The focal length of the...
- The equation = 1.227/x nm can be used to find the de- Broglie wavelength of an electron. In this equation x stands for: Where m =...
- The half life period of a radioactive substance is 60 days. The time taken for 7/8th of its orignal mass to disintegrate will be -
- In the case of amplitude modulation to avoid distortion the modulation index ( ) should be :Not in JEE or NEET syllabus