41.

A p-n-p transistor is connected in a common emitter configuration in a given amplifier. A load resistance of 800 ohm is connected in the collector circuit and the voltage drop across it is 0.8 V. If the current amplification factor is 0.96 and the input resistance of the circuit is 192 ohm, the voltage gain and the power gain of the amplifier will respectively be,

• 3.69,3.84

• 4,4

• 4,3.69

• 4,3.69

Match the corresponding entries of Column 1 with Column 2. [ where m is the magnification produced by the mirror]

• A --> a and c; B --> a and d; C --> a and b ; D --> c and d

• A --> a and d; B -->  b and c; C --> b and d; D --> b and c

• A --> c and d; B --> b and d; C --> b and c; D --> a and d

• A --> c and d; B --> b and d; C --> b and c; D --> a and d

An electron of mass m and a photon have the same energy E. The ratio of de-Broglie wavelength associated with them is,

When an alpha particle of mass m moving with velocity v bombards on a heavy nucleus of charge Ze, its distance of closest approach from the nucleus depends on mass as,

• 
• 

• m

• m

The angle of incidence for a ray of light at a refracting surface of a prism is 45^o. The angle of prism is 60^o. If the ray suffers minimum deviation through the prism, the angle of minimum deviation and refractive index of the material of the prism respectively, are

• 30^o, 

• 45^o ; 

• 30^o; 

• 30^o;