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SSC Scientific Assistant: Physics Quiz 4

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Question 1

An element with atomic number Z=11 emits K_α - X ray of wavelength λ. The atomic number of element which emits K_α -X-ray of wavelength 4λ is

Question 2

The pressure on a square plate is measured by measuring the force on the plate and the length of sides of the plate. If the maximum error in measurement of force and length are respectively 4% and 2%, then the maximum error in the measurement of pressure is

Question 3

A body of mass 2 kg moving with a velocity of 6 m/s strikes inelastically with another body of same mass at rest. The amount of heat evolved during collision is

Question 4

A lead shot of 1 mm diameter falls through a long column of glycerine. The variation of the velocity ν with distance covered (s) is correctly represented by

Question 5

A condenser of capacitance C is fully charged by a 200V supply. It is then discharged through a small coil of resistance wire embedded in thermally insulated block of specific heat 250 j/kg-K and of mass 100 g. If the temperature of the block rises by 0.4 K, then the value of C is

Question 6

An electric bulb of 100 W is connected to a supply of electricity of 220 V. Resistance of the filament is

Question 7

An electric bulb marked as 50 W-200 V is connected across a 100 V supply. The present power of the bulb is

Question 8

At a particular height, the velocity of an ascending body is $Description: E:\WBJEE\2016\2016_Physics_files\image010.png$ . The Velocity at the same height while the body falls freely is