Engineering College Admission Test

      

       PHYSICS 

Engineering College Admission Test

 (ECAT 2011)

      1.       Force is required to be a body of 1 kg placed on inclined plane at an angle of 30^o to move it. The force is
(g, g radical 3, g/radical 3,g/radical 2)  

2.       A ball strikes another ball mass 2 kg and 1 kg at rest with a velocity 30 ms^-2.If after the collision the velocities  are 20 and 15 ms^-1,then
(it undergo Elastic collision—true option)

3.       Two satellites s1 and s2 are with radius from the centre of earth of 80,000 and 40,000,then their orbital velocity v1 and v2 are
( radical 2 v1=v2,radical 2 v2=v1,v1=v2,none)

4.       A body takes a pendulum in the lift and it accelerates upwards the tension in the string (increases ,decreases ,first increases then decreases, decreases then increases)

5.       The pressure in a pipe of varying cross sectional area, the pressure at smallest radius portion of it 
(minimum ,maximum ,none)

6.       A car approaches c1 to another c2 with a velocity of____.If the apparent frequency of c1,when it horns, for c2 is___.The real frequency is?
( the data was given---the type of question was like this)

      7.       In astronomical telescopes the final image is formed at

      (near point, infinity)
8.       A gas is enclosed in a container fitted with piston of cross sectional of 0.03m² and pressure is maintained at 100Nm².When heat is slowly transferred, the piston is pushed up through a distance of 4 cm and 100 J heat is transferred to the system then final delta U?

9.       In carnot engine the gas is
(explained isothermally and compressed adiabatically respectively, or other option were there)

10.   A charge of 100mC passes through a potential difference of 100V of mass 0.1ms,then what is charge in velocity?

11.   When a 500 ohm resistance is replaced by 100 ohm in a cell, effect on terminal velocity?

12.   Current passing through two wires in same direction
(repel, attract)

13.   A particle passes through the solenoid along the axis, then it will pass along the path
(parallel to axis,along spiral path etc)

14.   In RC circuit_____leads the_____

15.   If a bulb and capacitors are connected in series, the current passing in AC,then bulb will
(glow, fused, nothing  happens, etc)

16.   Transistor is used as
(switch--- right answer)

17.   If inputs are different then for NAND gate, the output is?

18.   A boy named Amir sees a scale placed on earth while he is in aero plane. Then the length of scale will
(increased, decreased, same)

19.   If the speed of body is increased, the mass of body will
(increase, decrease, none)

20.   As the temperature increases, no.of longer wavelength in radiation
(increases, decreases, none)

21.   When photo electrons are emitted from metal surface then what would be greater than threshold?
(intensity, frequency, both, none)

22.   Davison and Germer experiment proves
( wave nature of electrons, particle nature of electrons, both)

23.   Laser will produce if the atoms in lower energy states are___ than those in higher energy states
(greater, less, equal, All)

24.   A flexible loop of wire is lying such that field of lines are parallel to area. If area begins to change then emf induced is
(maximum, zero, both, none)

25.   In FM,the amplitude of carrier wave is
(diminished, increased, both, none)