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Physics
List of top Physics Questions
A body weighs 75 gm in air, 51 gm when completely immersed in an unknown liquid and 67 gm when completely immersed in water. Find the density of the unknown liquid:
JEECUP - 2024
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Physics
Buoyancy and Floatation
The gravitational force between two masses kept at a certain distance is \( P \) Newton. The same two masses are now kept in water and the distance between them is the same. The gravitational force between these two masses in water is \( Q \) Newton. Then:
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Physics
Gravitational Force
A spherical mirror and a thin spherical lens each have a focal length of \( -15 \, \text{cm} \). The nature of the mirror and lens will be:
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Physics
Spherical Mirrors
In a simple pendulum experiment, a student calculates the value of \( g = 9.92 \, \text{m/s}^2 \), but the standard value of \( g \) is \( 9.80 \, \text{m/s}^2 \). Then the percentage error in the calculation of \( g \) is:
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Physics
Percentage Error
A sound wave has a frequency of 500 Hz and wavelength 80 cm. How long will it take to travel 1 km?
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Physics
Traveling Sound Waves
A stone is gently dropped from a height of 20 m. If its velocity increases uniformly at the rate of \( 10 \, \text{m/s}^2 \), with what velocity and after what time will it strike the ground?
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Physics
Equations of Motion
A person travels towards North by 4 m and then turns to West and travels by 3 m. The distance and displacements from initial point are
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Physics
Newton's Laws of Motion
Two equal forces of 300 Newton each acting at an angle of 60°, the resultant will be
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Physics
Vector addition – analytical method
Modulus of rigidity of a liquid is
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Physics
Elasticity
A sphere of 150 kg is kept on frictionless surface. A bullet of 0.15 kg mass with velocity 200 m/sec strikes the sphere and stops. After collision the velocity of sphere will be
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Physics
Conservation Of Momentum
Least count of vernier calipers is 0.01 cm. Measuring the length of an object reading of main scale is 2.7 cm and the fifth division of vernier scale coincide with any division of main scale. The length of object will be
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Physics
Accuracy, precision of instruments and errors in measurement
Water falls from 100 metre height. What will be temperature rise per kg of water due to fall?
\(g = 10 \, \text{m/s}^2\), specific heat of water = 4200 Joule/kg°C
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Physics
Conservation Of Momentum
Zener diode is used as an
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Physics
Zener Diodes
The material of permanent magnet has
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Physics
Magnetic Materials
Balance the equation
\[ {}^9_4\text{Be} + {}^4_2\text{He} \rightarrow {}^6_12\text{C} + \cdots \]
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Physics
Nuclear physics
Electrical conductivity of a semiconductor
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Physics
Semiconductors
If velocity of light in air is \(3 \times 10^8\) m/s and that in water is \(2 \times 10^8\) m/s, then what would be the critical angle?
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Physics
Optics
The order of radius of the nucleus of an atom is
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Physics
Nuclear physics
Two springs with spring constants \(K_1 = 1500 \, \text{N/m}\) and \(K_2 = 3000 \, \text{N/m}\) are stretched by the same force. The ratio of potential energy stored in spring will be
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Physics
potential energy
A man can see upto 5 metre clearly. To see clear upto 10 m, the focal length of lens will be
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Physics
Images Formed By Lenses
A cycle tyre bursts suddenly. This represents an
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Physics
Gas laws
A force is applied on a 6 gm mass (at rest) for 20 seconds. After no force is exerted on it and after travelling distance of 50 cm in 5 seconds, mass stops. The amount of force in Newton will be
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Physics
Newton's Laws of Motion
Length of a rod increases 0.2% on increasing the temperature by 100°C. The value of coefficient of linear expansion of material of rod is
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Physics
Thermal Expansion
A particle of charge ‘q’, mass ‘m’ and velocity ‘v’, enters perpendicular to a magnetic field ‘B’, force on particle will be
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Physics
Magnetic Force
In a 10 cm long horizontal wire, 5 Amp current is flowing. The mass of the wire is \(3 \times 10^{-3}\) kg/m. What will be the field to keep wire stable?
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Physics
Force On A Current-Carrying Conductor In A Magnetic Field
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