Tuesday, March 31, 2015

An object 2.4 m in front of a lens forms a sharp image on a film 12 cm behind the lens. A glass plate 1 cm thick, of refractive index 1.50 is interposed between lens and film with its plane faces parallel to film. At what distance (from lens) should object be shifted to be in sharp focus on film?
a)7.2 m
B)2.4 m
C)3.2 m
D)5.6 m

Monday, March 30, 2015

In the sequence {1}, {2 , 3}, {4 , 5 , 6}, {7 , 8 , 9 , 10} .......... of sets the sum of elements in the 50th set is

Sunday, March 29, 2015

A 5kg stone falls from a height of 1000m and penetrates 2m in a layer of sand. The time of penetration is
A)14.285 s
B)0.0285 s
C)7.146 s
D)0.285 s

Saturday, March 28, 2015

A metal ball of mass 2 kg moving with a speed of 36 km/hr has a head-on collision with a stationary ball of mass 3 kg. If after collision, both the balls move together, then loss in kinetic energy due to collision is
A)40 J
B)60 J
C)100 J
D)140 J

Thursday, March 26, 2015

Which of the following is a favourable factor for cation formation ?
A)High electronegativity
B)High electron affinity
C)Low ionisation potential
D)Smaller atomic size

Wednesday, March 25, 2015

Which of the following is a scalar quantity? 
A)Electric current 
B)Electric field strength 
D)Linear momentum

Tuesday, March 24, 2015

A smooth string passes over a fixed light pul ley and masses 1kg and 2kg are tied to the two ends of the string. The system is held at rest and then released. The centre of mass of the system A)remains in the same position
B)moves down
C)moves up
D)first moves up and then moves down

Monday, March 23, 2015

The point collinear with (1, -2, -3) and (2, 0, 0) among the following is (Eamcet-2005)
C)(0, -4, -6)

Friday, March 20, 2015

The number of parts into which the plane is divided by n distinct st. lines drawn in the plane through a point is

Thursday, March 19, 2015

If the point A(3, -2, 4), B(1, 1, 1) and C(-1, 4, -2) are collinear then (C : AB) =
A)1 : 2
B)-2 :1
C)-1 : 2
D)4 : 0

Wednesday, March 18, 2015

The principle superimposing signal frequency on a carrier wave is: 

Tuesday, March 17, 2015

The average self-induced emf in a 25 m H solenoid when the current in it falls from 0.2 A to 0 A in 0.01 second, is
A)0.05 V
B)00.5 V
C)500 V
D)50 V

Monday, March 16, 2015

Two spheres ‘X’ and ‘Y’ collide. After collision, of the momentum of X is doubled,
A)the initial momentum of X and Y are equal
B)the initial momentum of X is greater than that of Y
C)the initial momentum of Y is double that of X
D)the loss in momentum of Y is equal to the initial momentum of

Saturday, March 14, 2015

Two identical piano wires have a fundamental frequency of 600 c/s when kept under the same tension. What fractional increase in the tension of one wire will lead to the occurrence of 6 beats per second when both wires vibrate simultaneously ?

Friday, March 13, 2015

A boy walks to his school at a distance of 6km with constant speed of 2.5kmph and walks back with a constant speed of 4kmph. His average speed for round trip expressed in kmph is 

Thursday, March 12, 2015

If 10% of a radioactive material decays in 5 days, then the amount of original material left after 20 days is approximately:        
A) 70%     

Friday, March 6, 2015

The propulsion of a rocket is based on the principle of conservation of 
A)linear momentum
C)angular momentum 

Wednesday, March 4, 2015

The propulsion of a rocket is based on the principle of conservation of
A) linear momentum
D)momentum mass

Tuesday, March 3, 2015

The curve represented by x = (cos t + sin t) and y = 5(cos t - sin t) is 
A)a circle 
B)a parabola 
C)an ellipse
D)a hyperabola
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