Practice paper · Bengaluru region

Identify the wrong statement

1. AInside a conductor, electrostatic field is zero
2. BAt the surface of a charged conductor, electrostatic field must be tangential to the surface at every point
3. CThe interior of a conductor can have no excess charge in the static situation
4. DElectrostatic potential is constant throughout the volume of the conductor and has the same value (as inside) on its surface

Ozone layer absorbs

1. AVisible light
2. BU.V. Radiation
3. CInfra-red radiation
4. DMicrowave Radiation

The diffraction patterns due to a straight edge contains

1. Aalternate bright and dark bands of same width
2. Balternate bright and dark bands with decreasing width as the order of the band increases in the illuminated part
3. Calternative bright and dark bands with increasing width as the order of the band increases
4. DNone of the above is true.

If the number turns per unit length of a coil of a solenoid is doubled, then the self-inductance of the solenoid will be

1. Abecome four times
2. Bbecomes doubled
3. Cbecomes half
4. Dunchanged

Coulomb’s law between two electric charges is valid for

1. AStationary charges
2. BPoint charges
3. CSpherical bodies
4. DBoth (a) and (b)

In photoelectric effect, the K.E. of electrons emitted from the metal surface depends upon

1. AIntensity of light
2. BFrequency of incident light
3. CVelocity of incident light
4. DBoth intensity and velocity of light

If a long hollow copper pipe carries a direct current, the magnetic field associated with the current will be

1. Aonly inside the pipe
2. Bonly outside the pipe
3. Cboth inside and outside the pipe
4. Dneither inside nor outside the pipe