List of top Physics Questions asked in JCECE

What is the value of inductance L for which the current is a maximum in a series LCR circuit with $ C=10\mu F $ and $ \omega =1000\,{{s}^{-1}} $ ?

If the mass of moon is $ \frac{\text{M}}{\text{81}}\text{,} $ where M is the mass of earth, find the distance of the point from the moon, where gravitational field due to earth and moon cancel each other. Given that distance between earth and moon is 60R, where R is the radius of earth.

For sky wave propagation of 10 MHz signal, what should be the minimum electron density in ionosphere?

According to Bernoullis equation $ \frac{P}{\rho g}+h+\frac{1}{2}\frac{{{v}^{2}}}{g}=\text{constant} $ The terms A, B and C are generally called respectively:

27 small drops each having charge q and radius r coalesce to from big drop. How many times charge and capacitance will become?

Permanent magnet has properties retentivity and coercivity respectively

Half-lives of two radioactive substances A and B are respectively 20 min and 40 min. Initially the samples of A and B have equal number of nuclei. After 80 min the ratio of remaining number of A and B nuclei is

The magnetic moment has dimensions of

Alternating current is transmitted to take places

What is equivalent capacitance of the network? Each capacitor has $ \text{1}\,\text{ }\!\!\mu\!\!\text{ F} $ capacitance:

The two capacitors $ {{\text{C}}_{\text{1}}} $ and $ {{\text{C}}_{\text{2}}} $ are charged to potentials $ {{\text{V}}_{1}} $ and $ {{\text{V}}_{2}} $ and then connected in parallel. There will be no flow of energy, if:

If a body moves for 2 s with 15 m/s velocity towards east and then moves with 5 m/s velocity for 8 s towards north, then average velocity is :

The work done by the centripetal force F when the body completes one rotation around the circle of radius R is:

Work done in rotating a bar magnet from 0 to angle $ \text{ }\!\!\theta\!\!\text{ } $ is:

In $LCR$ circuit $ {f = \frac{ 50 }{ \pi} \, Hz, V = 50 \, volt, R = 300 \, \Omega}$ . If $L = 1 \, H$ and $C = 20 \, \mu \, C$, then voltage across capacitor is

Which one has highest binding energy per nucleon?

A block of mass $10\, kg$ is placed on rough horizontal surface whose coefficient of friction is $0.5$. If a horizontal force of $100 \,N$ is applied on it, then acceleration of the block will be :-

A person sees clearly at a distance of 100 cm, then power of lens used to see object at 40 cm is

Which is not the unit of electric field?

Quantum nature can prove :

Huygens wave theory cant explain:

An automobile travelling at 50 km/h, can be stopped at a distance of 40 m by applying brakes. If the same automobile is travelling at 90 km/h, all other conditions remaining same and assuming no skidding, the minimum stopping distance in metres is:

If a transformer of an audio amplifier has output impedance 8000 0 and the speaker has input impedance of 80, the primary and secondary turns of this transformer connected

A rifle shoots a bullet with a muzzle velocity of $ 500\,m{{s}^{-1}} $ at a small target 50 m away. To hit the target the rifle must be aimed: (Take $ g=10\,m{{s}^{-2}} $ )