List of top Physics Questions

Water is falling on the blades of a turbine at a rate of $6000 \,kg \,min ^{-1}$. The height of fall is $100\, m$. The power given to the turbine is
There is an electric field E in x-direction. If the work done on moving a charge of 0.2 C through a distance of 2 m along a line making an angle 60$^{\circ}$ with x-axis is 4 J, then what is the value of E?
A charge q is placed at the centre of the line joining two exactly equal positive charges The system of three charges will be in equilibrium, if q is equal to
In the circuit shown in the figure, the current through
Quality factor of LCR circuit having resistance R and inductance L at resonance frequency $ (\omega ) $ is given by:
A battery of internal resistance $4\Omega$ is connected to the network of resistances as shown in figure. In order that the maximum power can be delivered to the network, the value of R in $2\Omega$ should be
A domestic electrical appliance, working on a three pin will continue working even if the top pin is removed. The third pin is used only as a safety device.
The internal resistance of a cell of e.m.f. $2$ volts is $0.1 \Omega$. It is connected to a resistance of $3.9$ $\Omega$. The voltage across the cell will be (in volts)
Ten identical wires each having a resistance of one ohm are connected in parallel. The combination will have a resistance of
What is the equivalent resistance between A and B in the given figure
Which of the following relation is called as current density ?
What is the dielectric constant of a conductor?
A simple pendulum with a bob of mass m oscillates from A to C and back to A such B that PB is H. If the acceleration due to gravity is g, then the velocity of the bob as it passes through B is
It is possible to have a positively charged body at
Susceptibility is positive for
Curie temperature of iron is the temperature below which, it is
Convex lens of power 4D and a concave lens of power 3D are placed in contact. What is the equivalent power of the combination?
A diminished image of an object is to be obtained on a screen 1.0 m from it. This can be achieved by placing
Two coherent waves of intensities 7 and $ 4I $ are superimposed on each other. The intensity at the constructive interference will be:
Which of the following is a dimensionless quantity?
The tension in piano wire is $10 \,N$.What should be the tension in the wire to produce a note of double the frequency?
The reactance of an inductance of $0.01\, H$ to a $50 \,Hz$ A.C. is
The radius vector, drawn from the Sun to a planet sweeps out equal areas in equal lines. This is the statement of
The power factor varies between
If a $p-n$ diode is reverse biased, then the resistance measured by an ohm-meter, will be