List of top Physics Questions asked in KCET

The unit of electrical power is
ampere hour is a unit of
A thermos flask contains hot coffee. The flask is vigorously shaken. Then the temperature of the coffee will
A ring shaped metal is allowed to expand by heating it. The hole will
A hole is drilled along the earth's diameter and a stone is dropped into it. When the stone is at the centre of earth, it has
SI unit of magnetic field is
An object is dropped from rest, its velocity V changes in the following forms
Absolute zero of temperature is
An athlete runs along a circular track of diameter 80m. The distance travelled and the magnitude of displacement of the athlete when he covers \(\frac{3^{th}}{4}\) of the circle is ( in m)
The electric current flowing through a given conductor varies with time as shown in the graph below. The number of free electrons which flow through a given cross-section of the conductor in the time interval 0 ≤ t ≤ 20s is
The electric current flowing through a given conductor
A uniform magnetic field of strength B =2mT exists vertically downwards. These magnetic field lines pass through a closed surface as shown in the figure. The closed surface consists of a hemisphere S1 , a right circular cone S2 and a circular surface S3 . The magnetic flux through S1 and S2 are respectively
A uniform magnetic field
A cube of side 1 cm contains 100 molecules each having an induced dipole moment of 0.2×10-6C-m in an external electric field of 4NC-1. The electric susceptibility of the materials is_____ C2N-1m-2
The I-V graph for a conductor at two different temperatures 100°C and 400°C is as shown in the figure. The temperature coefficient of resistance of the conductor is about (in per degree Celsius)
The I-V graph for a conductor at two different temp. 100°C and 400°C
A motor-cyclist moving towards a huge cliff with a speed of 18 kmh-1, blows a horn of source frequency 325 Hz. If the speed of the sound in air is 330 ms-1, the number of beats heard by him is
The magnetic field at the centre of a circular coil of radius R carrying current I is 64 times the magnetic field at a distance x on its axis from the centre of the coil. Then the value of x is
An electric blub of 60 W, 120 V is to be connected to 220 V source. What resistance should be connected in series with the bulb, so that the bulb glows properly?
A luminous point object O is placed at a distance 2R from the spherical boundary separating two transparent media of refractive indices n1 and n2 as shown, where R is the radius of curvature of the spherical surface. If \(n_1=\frac{4}{3}, n_2=\frac{3}{2}\) and R =10 cm, the image is obtained at a distance from P equal to
A luminous point object
In an experiment to determine the temperature coefficient of resistance of a conductor, a coil of wire X is immersed in a liquid. It is heated by an external agent. A meter bridge set up is used to determine resistance of the coil X at different temperatures. The balancing points measured at temperatures t1=0°C and t2=100°C are 50 cm and 60 cm respectively. If the standard resistance taken out is S=4Ω in both trials, the temperature coefficient of the coil is
balancing points measured at temperatures t1=0°C and t2=100°C
If the angle of minimum deviation is equal to angle of a prism for an equilateral prism, then the speed of light inside the prism is _____
The ratio of molar specific heats of oxygen is
An equiconvex lens of radius of curvature 14 cm is made up of two different materials. Left half and right half of vertical portion is made up of material of refractive index 1.5 and 1.2 respectively as shown in the figure. If a point object is placed at a distance of 40 cm , calculate the image distance.
An equiconvex lens of radius of curvature
The figure shows variation of R,XL and XC with frequency ' f ' in a series LCR circuit. Then for what frequency point is the circuit capacitive?
LCR circuit
In the figure, a conducting ring of certain resistance is falling towards a current carrying straight long conductor. The ring and conductor are in the same plane. Then the
a conducting ring of certain resistance
In alpha particle scattering experiment, if v is the initial velocity of the particle, then the distance of closest approach is d. If the velocity is doubled, then the distance of closest approach becomes
Electromagnetic waves are incident normally on a perfectly reflecting surface having surface area A. If I is the intensity of the incident electromagnetic radiation and c is the speed of light in vacuum, the force exerted by the electromagnetic wave on the reflecting surface is