List of top Physics Questions asked in JKCET

An ideal gas is heated at constant volume until its pressure doubles. Which one of the following statements is correct?
The ratio of mass defect of the nucleus to its mass number is maximum for
An observer standing near the sea-coast counts $48$ waves per min. If the wavelength of the wave is $ 10\,m, $ the velocity of the waves will be
A body is travelling towards East with a speed of $9\, m / s$ and with an acceleration of $2\, m / s ^{2}$ acting along West on it. The displacement of the body during the $5^{\text {th }}$ second of its motion is
Two pendulum oscillate with a constant phase difference of $45^{\circ}$ and same amplitude. If the maximum velocity of one of them is $v$ and that of other is $v+x$ then the value of $x$ will be
Consider the two cells having emf $E_{1}$ and $E_{2}\left(E_{1}>E_{2}\right)$ connected as shown in the figure. A potentiometer is used to measure potential difference between $P$ and $Q$ and the balancing length of the potentiometer wire is $0.8\, m$. Same potentiometer is then used to measure potential difference between $P$ and $R$ and the balancing length is $0.2\, m$. Then, the ratio $E_{1} / E_{2}$ is
Consider a ray of light travelling from a denser to a rarer medium. If it is incident at the critical angle then
Consider a bi-convex lens and a plano-convex lens, with radii of curvature of all the curved surfaces being same. If $f$ is the focal length of bi-convex lens then, the focal length of the plano-convex lens is
In a transformer the number of primary turns is four times that of the secondary turns. Its primary is connected to an $AC$ source of voltage $V$. Then,
Which of the following is NOT an electromagnetic wave?
A parallel narrow-beam of light is falling normally on a glass sphere. It will come to a focus
An infinite line charge produces a field of $ 18\times 10^{5}\,N/C $ at a distance of $ 4\,cm $ . What is the linear charge density?
A constant retarding force of $ 80\,N $ is applied to a body of mass $ 50\,kg $ which is moving initially with a speed of $ 20\,m/s $ . What would be the time required by the body to come to rest?
What happens to the acceleration due to gravity with the increase in altitude from the surface of the earth?
Which of the following is a dimensionless quantity?
The angle between the true geographic north and the north shown by a compass needle is called as
An athlete throws the shot-put of mass $ 4\,kg $ with initial speed of $ 2.2\,ms^{-1} $ at $ 41^{\circ} $ from a height of $ 1.3\,m $ from the ground. What is the KE of the shot-put when it reaches the ground? (Ignoring the air resistance and gravity $ g=9.8 \, m/s^{-2} $ )
The correct order of arrangement of electromagnetic waves according to their wavelength is
Which one of the following equation is Torricelli law?
A zener diode is used as
In a video signal for transmission of picture, what value of bandwidth is used in communication system?
When a particle returns to its initial point, its
What is the fraction of molecular volume to the actual volume occupied by oxygen gas at $STP$ ? Given, the diameter of oxygen molecule is $ 2\,? $ .
A spring balance has a scale that reads from $ 0 $ to $ 60\,kg $ . The length of the scale is $ 30\,cm $ . A body suspended from this balance and when displaced and released, oscillates with a period of $ 0.8\,s, $ what is the weight of the body when oscillating?
A crane lifts weight of $ 75\,kg $ to a height of $ 15\,m $ in $ 15\,s $ . The power of the crane is (assuming $ g=9.8\,m/s^{2} $ )