NET 3 2014

NET 3 2014

1.When distance btwn source and screen is made 0.25 times what will be the separation btwn dark fringes?

2.Pick the odd one out..

D)tortoise
b)whale
c)snake
d)lizard

3.pick odd one out:

a. toluene
b. phenol
c. benzene
d. nitro benzene

4.The angle of the vector -4 under root 3 i +4 j with + ive y axis is

A.30
B.45
C.60
D.15

5.The acid amides can be prepared by the reaction of NH3 with;

A.ethers
B.acid anhydride
C.acid halide
D.all

6.The value of azimuthal quantum no. (l) is from

A.0 to -n
B.0 to +n
C.0 to n-l
D.0 to n+l

7.If an e jumps from 5 orbital of hydrogen atom to 6 orbital then the change in its energy is

A.30%
B.44%
C.50%
D.none

8.SI unit of electric field is;

a) N/C
b) V/m
c) both a and b
d) none of above

9.Can matter alter the space??

a)Yes

b)No
c)May be yes or not
d)None

10.If you are on the moon than gravity is acting towards;

a) Milky ways
b) Earth
c) Planets
d) Sun

11.Pascal is the unit of;

a) Pressure
b) F/A
c) both a and b
d) none

13.Product of force and time is called;

a) Momentum
b) Torque
c) Impulse
d) none

14.Which compounds are more viscous;

a) Saturated
b) Unsaturated
c) both
d) none

15.: Sajid starting from his house, goes 4 km in the East, then he turns to his right and goes 3 km. What minimum distance will be covered by him to come back to his house?

a) 4 km
b) 3 km
c) 5 km
d) 2 km

16.Asif starting from his house, goes 5 km in the East, then he turns to his left and goes 4 km. Finally he turns to his left and goes 5 km. Now how far is he from his house and in what direction?

a) 2 km east
b) 4 km north
c) 4 km north east
d) none of above

17.Which of the following is the smallest prime number;

a)1
B)2
C)3
D)0

18.3^x + 3^y = 3^x+y then dy/dx is 

A) 3^x-y 
B)3^y-x 
C)-3^x-y
D)-3^y-x

19.Energy is stored in an inductor in the form of;

a) Magnetic energy
b) Potential Energy
c) Electrical energy
d) none

20.Output voltage of transformer is 3 times the input voltage then turns ratio will be;

a) 1:1
b) 1:3
c) 3:1
d) none

21.Snonym of Nightmare;

a) ordeal
b) terror
c) daymare
d) certainty

22.Which of these are obtained from fungal cultures?

A. Gibberlins
B. Absicisic acid
C. Ethene
D. None of these

23.Sunset makes sky appear reddish because of

(a) diffraction of sun rays
(b) refraction of light
(c) scattering of light from dust particles
(d) polarization of light

24.Cobalt-60 is a source of.

A. Alpha rays.
B. beta rays.
C.gamma rays.
D.none of these.

25.In de-broglie's equation electron behaves as

a) light rays
b) x rays
c) gamma rays
d) none

26.Body of fish is streamlined or______

a) Spindle
b) Sphere
c) Cylindrical
d) None

27.Body of fish is streamlined or______

a) Spindle
b) Sphere
c) Cylindrical
d) None

28.Order of reactivity of alcohols with halogens is 

A) primary > secondary > tertiary
B) secondary > tertiary > primary
C) tertiary > secondary > primary
D) none of these

29.Pick the odd one out 

a-plastic
b-wood
c-paper
d-wool

30.When the string attached to the body moving in a circle breaks then force acting on the string at that instant is;

A) 0
B) infinity
C) cannot be determined
D) None of above

31.If a,b € R then which will be greater;
a) a+b
b) a-b
c) a*b
d) insufficient data

32.By increasing frequency, resonance will

a) decrease
b) increase
c) remains same
d) none

33.Which material is suitable for making perfect magnet;

a) Soft iron
b) Iron
c) Steel
d) Copper

34.Domain of 3sin^2x

a) R
b) -3<x♥
c) [-3,3]
d) none

35.When a magnetic is heated it;

a) Weakens
b) Strengthens
c) demagnetized completely
d) none

36.Which of the following will experience maximum force in the magnetic field;

a) Proton
b) Electron
c) He^+
d) all experience same

37.Which force do maximum work ;

a) Centripetal force
b) tension in the string
c) conservative forces
d) none

38.What will be the effect on value of g if earth stops rotation;

a) Increases
b) Decreases
c) remains same
d) Insufficient data

39.Angle b/w rectangular co-ordinates of a vector 

a) 90
b) 180
c) They are mutually perpendicular
d) none

40.Light waves is ...

a)transverse wave 

b)longitudinal wave

c)Electromagnetic waves

d)both b and c

41)which of the following is best conductor?

a)silver

b)Al

c)Gold

d)Cu