1.

"The congress was reluctant to include the demands of industrial workers in its program of struggle." analyze the reasons.

2.

For a medium with permittivity (e) and permeability (µ), the speed of light (v) is given by:

• \(v=\sqrt{\frac{\mu}{\isin}}\)
• \(v=\sqrt{\mu\isin}\)
• \(v=\frac{1}{\sqrt{\mu\isin}}\)
• \(v=\sqrt{\frac{∈}{μ}}\)

3.

Energy band gap is maximum in:

• metals
• semi-conductor
• super conductor
• insulator

4.

The correct mathematical expression for amplitude modulated wave is:

• A_csinω_ct
• A_msinω_mt
• (A_C+ A_msinω_mt)sinω_Ct
• (A_Csinω_Ct + A_msinω_mt

5.

A parallel beam of monochromatic light of wavelength 460 nm passes through a long slit of width 0.1 mm. What is the angular divergence in which most of the light is diffracted?

• 2.3×10^-3 rad
• 4.6×10^-3 rad
• 9.2×10^-3 rad
• 9.2×10^-6 rad

6.

What is the wavelength of light for the least energetic photon emitted in the Lyman series of the hydrogen atom spectrum lines?
(Take h=6.63×10^-34Js; c=3×10⁸ ms^-1; e=1.6×10^-19C)

• 122nm
• 12.2nm
• 1.22nm
• 10.2nm