List of top Physics Questions asked in JKCET

A moving block having mass $m$, collides with another stationary block having mass $4\,m$. The lighter block comes to rest after collision. When the initial velocity of the lighter block is $v$, then the value of coefficient of restitution (e) will be
A force $ F = 3x^2 + 2x + 1 $ acts on a body in the $ x $ -direction. The work done by this force during a displacement from $ x = -1 $ to $ +1 $ is
The $ C.G.S. $ unit of magnetic field at a point, due to Biot-Savart law is
An electric bulb is rated $ 220\, V $ and $ 100\, W $ . What is the power consumed by it when operated on $ 110\, V $ ?
Which o f the following is true with respect to Rogers spiral experiment?
An example for the best source of monochromatic light is
The earth?s mass is $ 80 $ times that of moon and their diameters are $ 1600 \,km $ and $ 800 \,km $ , respectively. If $ g $ is the value of acceleration due to gravity on earth, what is its value on moon?
What is the electric field at the centroid of an equilateral triangle of side length $ r $ , carrying charge $ q $ at each corner?
A refrigerator is to maintain eatables kept inside at $ 9 $ degree Celsius. If the room temperature is $ 36 $ degree Celsius, then what is the coefficient of performance?
What will be the potential at the centre of the sphere when a hollow metal sphere of radius $ 10\, cm $ is charged such that the potential on its surface is $ 80\, volts $ ?
Molecular weight of oxygen is $ 32\, amu $ . At $ STP $ , volume of $ 1\, gm $ of oxygen is $ 700 \,cm^3 $ . What is the value of gas constant $ R $ ?
If the heat of $ 110\,\,J $ is added to a gaseous system, whose internal energy is $ 40\,\,J $ , then the amount of external work done is:
A $ 1000\, kHz $ carrier wave is modulated by an audio signal of frequency range $ 600-6000 \,Hz $ . What is the bandwidth of the channel?
The dimensional formula of coefficient of viscosity can be expressed as $ M^a\, L^bT^c $ . What are the values of $ a $ , $ b $ and $ c $ .
A square loop of side $ 10\, cm $ and resistance $ 5 \,Ohm $ is placed vertically in East-West plane. A uniform magnetic field of $ 1 $ Tesla is set across the plane in North-East direction. The magnetic field becomes Zero in $ 700 $ ms at a steady rate. The magnitude of induced $ emf $ during this interval is
Two masses $ m_1 $ and $ m_2 $ are connected by a massless string over a fixed pulley. If $ m_1 > m_2 $ , $ m_1 $ will move downward and $ m_2 $ will move upward. What is the acceleration with which the combination o f two masses will move? ( $ g = $ acceleration due to gravity)
What is the total capacitance of the combination when $ 3 $ capacitors each of capacitance $ 9 \,pF $ are connected in series?
A zener breakdown occurs in a zener diode when
A quartz prism can produce a minimum deviation $ \delta $ in a light beam. Then the minimum deviation produced by three prisms combined together is
In a semiconductor, the conductivity increases with the increase in temperature due to
A uniform bar of mass $ M $ and Length $ L $ is bent in the form of an equilateral triangle. Find the moment of inertia of the triangle about an axis passing through the centre of mass and perpendicular to the plane of the triangle.
In an experiment using Young?s double slit, what will be the value of fringe width $ \beta $ , if the wavelength is doubled?
Which one of the following is not emitted by radioactive elements ?
A $10\, V$ battery with internal resistance $1\, \Omega$ and a $15\, V$ battery with internal resistance $0.6\, \Omega$ are connected in parallel to a voltmeter (see figure). The reading in the voltmeter will be close to :
In a bar magnet, the ratio of magnetic length to geometrical length is nearly