List of top Physics Questions asked in JCECE

A stationary body of mass m explodes into the three parts having masses in the ratio 1:3:3. The two fractions with equal masses move at right angles to each other with a velocity of $ 1.5\,m{{s}^{-1}}. $ The velocity of the third part is:
A particle moves along Y-axis in such a way that its $ y- $ coordinate varies with time $ t $ according to the relation $ y=3+5t+7{{t}^{2}}. $ The initial velocity and acceleration of the particle are respectively:
A heavy brass sphere is hung from a weightless inelastic spring and as a simple pendulum its time period of oscillation is T. When the sphere is immersed in a non-viscous liquid of density 1/10 that of brass, it will act as a simple pendulum of period :
The .examples of diamagnetic, paramagnetic and ferromagnetic materials are respectively:
An $ \alpha - $ particle of mass m suffers one dimensional elastic collision with a nucleus of unknown mass. After the collision the $ \alpha - $ particle is scattered directly backwards losing 75% of its kinetic energy. The mass of the unknown nucleus is:
The resistors are connected as shown in the figure below. Find the equivalent resistance between the points A and B.
A block of mass 2 kg rests on a plane inclined at an angle of $ {{30}^{o}} $ with the horizontal. The coefficient of friction between the block and surface is 0.7. The frictional force acting on the block is:
A person is standing in an elevator. In which situation he finds his weight less?
The radius of sphere is measured to be $ (2.1\,\pm \,0.5)\,cm. $ Calculate its surface area with error limits:
An object travels north with a velocity of $ 10\,m{{s}^{-1}} $ and then speeds up to a velocity of $ 25\,m{{s}^{-1}} $ in 5 s. The acceleration of the object in these 5 s is:
A child is swinging a swing. Minimum and maximum heights of swing from earths surface are 0.75 m and 2m respectively. The maximum velocity of this swing is:
Two vectors have magnitudes 3 and 5. If angle between them is 60$^{\circ}$, then the dot product of two vectors will be
The volume of a metal sphere increases by $ \text{0}\text{.15 }\!\!%\!\!\text{ } $ when its temperature is raised by $ \text{24}{{\,}^{\text{o}}}\text{C}\text{.} $ The coefficient of linear expansion of metal is:
The relative permeability of iron is $6000$. Its magnetic susceptibility is
As shown in figure, a planet revolves in elliptical orbit around the sun. Where is KE of the planet maximum?
A triode valve has an amplification factor of 20 and its plate is given a potential of 300 V. The grid-voltage to reduce the plate current to zero, is :
For a satellite moving in an orbit around the earth, the ratio of kinetic to potential energy is:
In an ideal parallel LC circuit, the capacitor is charged by connecting it to a DC source which is then disconnected. -The current in the circuit:
The period of SHM of a particle is 12 s. The phase difference between the positions at $ t=3\,s $ and $ t=4s $ will be:
If the velocity of light c, gravitational constant G and Planck's constant $ h, $ are chosen as fundamental units, the dimensional formula of length L in the new system is: