List of top Physics Questions asked in KCET

A body is moving along a straight line with initial velocity v₀. Its acceleration a is constant. After t seconds, its velocity becomes v. The average velociy of the body over the given time interval is

The true length of a wire is 3.678 cm. When the length of this wire is measured using instrument A, the length of the wire is 3.5 cm. When the length of the wire is measured using instrument B, it is found to have length 3.38 cm. Then the

The moment of inertia of a rigid body about an axis

A radioactive sample has half-life of 3 years. The time required for the activity of the sample to reduce to \(\frac{1}{5}\)th of its initial value is about

The truth table for the given circuit is

A proton moves with a velocity of 5 x 10⁶ j m/s, through the uniform electric field E = 4 x 10⁶ (2i + 0.2j + 0.1k) Vm^-1and the uniform magnetic field B = 0.2( i + 0.2 j + k) T. The approximate net force acting on the proton is

A solenoid of length 50 cm having 100 turns carries a current of 2.5 A. The magnetic field at one end of solenoid is

Four charges +q, +2q, +q and -2q are placed at the corner of square ABCD respectively. The force on unit positive charge kept at the centre 'O' is

The power of equi - concave lens is - 4.5 D and is made of a material R.I. 1.6, the radii of the curvature of the lens is

Which of the following radiations of electromagnetic waves has the highest wavelength ?

In a series LCR Circuit R = 300 Ω, L = 0.9 H, c = 2.0 µF and w = 1000 rad/sec. Then the impedance of the circuit is

A series resonant ac circuit contains a capacitance \(10^4\) F and an inductor of \(10^-4\) H. The frequency of electrical oscillations will be

A convex lense of focal length 'l' is placed somewhere in between an object and a screen. The distance between the object and the screen is 'x'. If the numerical value of the magnification produced by the lens is 'm'. Then the focal lenght of the lens is

A ray of light passes through an equilateral glass prism in such a manner that an angle of incidence is equal to the angle of emergence and each of these angles is equal to 3/4 of the angle of prism. The angle of deviation is

A magnetic field of flux density 1.0 Wb m^-2 acts normal to a 80 turns coil of 0.01 m² area. If this coil is removed from the field in 0.2 second, the emf induced in it is

A fully charged capacitor 'C' with initial charge 'q0' is connected to a coil of self inductance 'L' at t = 0. The time at which the energy is stored equally between the electric field and the magnetic field is

Which of the following statement proves that Earth has a magnetic field?

A long solenoid has 500 turns, when a current of 2A is passed through it, the resulting flux linked with each turns of solenoid is 4 x 10^-3 Wb, then the self induction of solenoid is

An alternating current is given by i = i₁ sin ωt + i₂ cos ωt. The r.m.s. current is given by

A wire of a certain material is stretched slowly by 10%. Its new resistance and specific resistance becomes respectively

If a voltage across a bulb rated 220 V, 100 W drops by 2.5 % of rated value. the percentage of rated value by which the power would decrease is

A circular coil of wire of radius 'r' has 'n' turns and carries a current ' I '. The magnetic induction 'B' at a point on the axis of the coil of distance √3 r from its center is

A galvanometer of resistance 50 Ω is connected to the battery of 3 V along with a resistance 2950 Ω in series. A full scale deflections of 30 divisions is obtained in galvanometer. In order to reduce this deflections to 20 division, the resistance in series should be

Wire bound resistors are made by

A charged particle is moving in an electric field of \(3 \times 10^{-10} \, \text{V} \, \text{m}^{-1}\) with mobility \(2.5 \times 10^{-6} \, \text{m}^2/\text{V}/\text{s}\) . Its drift velocity is