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List of top Physics-T Questions on Topic - 12

The given combination will work as:

0.2% solution of phenol is ___________while its 1% solution is________

When a light ray enters from oil to glass on oilglass interface. Velocity of light changes by a factor of: $\left(\mu_{oil}=2,\,\mu_{glass}=3/2\right)$

Find the position of final image from first lens.If the focal length of each lens is 10 cm.

Two identical thin plano-convex glass lenses (refractive index 1.5) each having radius of curvature of 20 cm are placed with their convex surfaces in contact at the centre. The intervening space is filled with oil of refractive index 1.7. The focal length of the combination is

Work done in turning a magnet of magnetic moment M by an angle of 90Âº from the mgnetic meridian is n times the corresponding work done to turn through an angle of 60Âº, where n is

If same charge 'q' is placed inside a sphere and cube, having radius 1 m and side 2 m respectively. What will be the ratio of flux passing through them:

Induction furnace uses ______ to produce heat

Find amount of charge flown from Y to X when switch S is closed.

0.2 moles of an ideal gas is taken round the cycle ABC as shown in the figure. The path B â†’ C is an adiabatic process, A â†’ B is an isochoric process and C â†’ A is an isobaric process. The temerature at A and B are T = 300 K and T = 500 K and pressure at A is 1 atm and volume at A is 4.9 L. The volume at C is (Given : $\gamma=\frac{Cp}{C_{V}}=\frac{5}{3}, R = 8.205 Ã— 10^{-2}$ L atm mol$^{-1}$ $K^{-1}, \left(\frac{3}{2}\right)^{^{2/5}} =0.81$

The refractive index of a particular material is $1.67$ for blue light, $1.65$ for yellow light and $1.63$ for red light. The dispersive power of the material is .........

For which one of the following, Bohr model is not valid?

A body weighs 72 N on the surface of the earth. What is the gravitational force on it, at a height equal to half the radius of the earth?

A screw gauge has least count of 0.01 mm and there are 50 divisions in its circular scale. The pitch of the screw gauge is:

Two cylinders $A$ and $B$ of equal capacity are connected to each other via a stop clock. A contains an ideal gas at standard temperature and pressure. $B$ is completely evacuated. The entire system is thermally insulated. The stop clock is suddenly opened. The process is:

The energy equivalent of 0.5 g of a substance is:

The Brewsters angle $i_b$ for an interface should be:

A cylinder contains hydrogen gas at pressure of 249 kPa and temperature $27^\circ\,C$. Its density is :$(R = 8.3\,J\,mol^{-1}K^{-1}$)

The solids which have negative temperature coefficient of resistance are :

The force of interaction between two charges $q_{1}=6\, \mu C$ and $q_{2}=2\, \mu C$ is $12\, N$. If charge $q=-2\, \mu C$ is added to each of the charges, then the new force of interaction is

A charge of $10^{-9} C$ is placed on each of the $64$ identical drops of radius $2\, cm$. They are then combined to form a bigger drop. Its potential will be

The phase difference between displacement and acceleration of a particle in a simple harmonic motion is:

There is $10$ units of charge at the centre of circle of radius $1\, m$. The work done in moving $1$ unit of charge once around the circle is :

The potential due to dipole at a point is proportional to:

The charge deposited on $4\, \mu F$ capacitor in the circuit is

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