1.

Energy band gap is maximum in:

• metals
• semi-conductor
• super conductor
• insulator

2.

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

3.

The logic gate realised using p-n junction diodes in the given figure is:

• OR gate
• NOT gate
• AND gate
• NAND gate

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.

The forbidden energy gaps in conductors, semiconductors and insulators are (E_g)_c, (E_g)_s and (E_g)₁ respectively. What is the relation among them ?

• (E_g)_c < (E_g)_s < (E_g)_t
• (E_g)_c > (E_g)_s > (E_g)_t
• (E_g)_c < (E_g)_s > (E_g)_t
• (E_g)_c = (E_g)_s > (E_g)_t