List of top Physics Questions

A cup of tea cools from $80^{\circ} C$ to $60^{\circ} C$ in one minute. The ambient temperature is $30^{\circ} C$. In cooling from $60^{\circ} C$ to $50^{\circ} C$. It will take:
Standing wave are produced in a $10 \,m$ long stretched string. If the string vibrates in $5$ segments and the wave velocity is $20 \,m/s$. The frequency is:
A ball falling in a lake depth $200\, m$ shows a decrease of $0.1 \%$ in its volume at the bottom then the bulk modulus of the material of the ball is:
A fixed volume of iron is drawn into a wire of length $ l. $ The extension $ x $ produced in this wire by a constant force $F$ is proportional to:
Two bars $A$ and $B$ of circular cross-section and same volume made of same material are subjected under same tension. If the diameter of $A$ is half that of $B$. The ratio of extension of $A$ to $B $ will be:
The soap bubbles radii in the ratio $2 : 1$ ratio of excess pressure inside there is:
For a given velocity, a projectile has same range $R$ for two angles of projections. If $t_1$ and $t_2$ are the time of flight in the 2 cases then
A sample of ideal monoatomic gas is taken around the cycle ABC A as shown in figure. The work done during cycle is
A lamp hanging 4 m above the table is lowered by 1 m. The illumination on the table
To send 10% of main current through a moving coil galvanometer of resistance $99\,\Omega$ the shunt required is
When a long spring is stretched by $2\, cm,$ its potential energy is $U.$ If the spring is stretched by $10\, cm,$ the potential energy stored in it will be
An electron moves in a circular path of radius $15 \,cm$ in a magnetic field of intensity $ B=4\times {{10}^{-4}}\,T $ . The velocity of electron is :
What is the value of linear velocity, if angular velocity is $3 \hat{ i }-4 \hat{ j }+\hat{ k }$ and distance from the centre is $5 \hat{ i }-6 \hat{ j }+6 \hat{ k }$ ?
The magnetic moment of a magnet of length $10 \,cm$ and pole strength $4.0\, Am $ will be:
Two point charges $ 3\times {{10}^{-6}}C $ and $ 8\times {{10}^{-6}}C $ repel each other by a force of $ 6\times {{10}^{-3}}N $ . If each of them is given an additional charge $ -6\times {{10}^{-6}}C $ , the force between them will be:
If potential difference across a capacitor is changed from 15 V to 30 V, work done is W. The work done when potential difference is changed from 30 V to 60 V, will be:
Which of the following is best close to an ideal black body :-
Which is having minimum wavelength : -

Which of the following are suitable for the fusion process 

A sample of radioactive element containing 4×1016 active nuclei. Half-life of the element is 10 days, then the number of decayed nuclei after 30 days 

For a transistor \(\frac{I_C}{I_E}\)= 0.96, then the current gain for the common emitter configuration 

In a PN junction : 

The given truth table is for which logic gate : 

truth table

A block of mass 10 kg placed on the rough horizontal surface having a coefficient of friction µ = 0.5, if a horizontal force of 100 N acting on it then the acceleration of the block will be :

If kinetic energy of a body is increased by 300% than percentage change in momentum will be