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Test Series-4
Instructions
Your test contains 12 multiple choice questions with only one answer
This is 30 min test.Please make sure you complete it in stipulated time
You can Finish this test any time using 'Submit' button.
Once finished you get a chance to review all question with correct answers and their solutions.
You will be awarded (2) marks each for indicated correct response of each question.
1.A body whose kinetic Energy is E is project at an angle 60 .Find out the Kinetic energy at the highest point
E
zero
3E/4
E/2
2. A particle is moving in the x-y plane with
x=at
y=bt
2
where a and b are constant
Find the trajactory of the particle?
parabola
circle
straight line
none of these
3.A body of 1 kg is acted by the following forces
F
1
=2
i
+3
j
+4
k
F
2
=4
i
-3
j
-(24)
1/2
k
F
3
=-2
i
+3
j
-4
k
Find the magnitude of the acceleration
7
4
3
10
4.If the change in the value of g at height H above the surface of the earth is the same as that at a depth D below it, then (both h and d are much smaller than the radius of the earth) the ratio (H/D + D/H ) is
1/2
3/2
2
5/2
5.A spring weighing machine inside a stationary lift read W N weight when a stone is kept on it.What will be the reading when the lift start moving downward with acceleration a
W(1-a/g)
W(1+a/g)
W
none of these
6.Boyle's law is an example of a ?
Latent Heat Process
Isothermal Process
Adiabatic Process
Isochoric Process
7.An electron(charge =1.6*10
-19
C) moves with a speed 2*10
6
m/s along the positive x- direction in a magnetic Field B=(
i
-3
j
-4
k
) tesla.Force experienced by the electron in Newton
1.6*10
-12
N
1.4*10
-12
N
1.6*10
-13
N
1.2*10
-12
N
8.A hollow metal sphere of radius 10 cm is charged such that potential on its surface is 10 V
Four statement are stated
STATEMENT -1
: The Potential at the center is 10 V
STATEMENT -2
: All the charged reside at the outer surface
STATEMENT -3
: Potential at a point 5 cm away from the surface is 10 V
STATEMENT -4
: Potential at a point 5 cm from the center of the sphere is 10 V
which one of the following is correct
All the statement are correct
Statement 1,2 and 4 are correct
Statement 1,2 and 3 are correct
Statement 2,3 and 4 are correct
9.According to Kirchoff's Ist law ,the algebric sum of the currents flowing towards a branch point is
greater then zero
equal to zero
greater or less than zero
less than zero
10.A train sounds its whistle as it approaches and leaves a station.An man at the station measures a frequency of 200 Hz as the train approaches and a frequency of 180 Kz as the train leave.Find the speed of the train. Speed of the sound is given as 340 m/s
17.89 m/s
19.89 m/s
16.91 m/s
17 m/s
11.The trajectory of a projectile in a vertical plane is given by
y=2x-4x
2
where x and y are the horizontal and vertical distance
Following statement are made about this motion
STATEMENT A
: The angle of projection is given by tan
-1
2
STATEMENT B
:The Range of the Projectile is .5 units
A and B both are correct
Only A is correct
Only B is correct
Both A and B are wrong
12.An circular coil of radius R consists of N turns of wire.The current in the wire is I.Let B is the magnetic field at the center of the coil Which of the following is true
B=μ
0
NI/R
B=μ
0
I/2R
B=μ
0
NI/4R
none of these
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