Engineering Entrance Sample Papers

JEE Physical World and Measurement Questions

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JEE Mains (Physics) Physical World and Measurement Questions:

Physical World and Measurement (JEE Mains Physics)

Question 1
If the resultant of the two forces has a magnitude smaller than the magnitude of larger force, the two forces must be

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A
Point in opposite directions
B
Different both in magnitude and direction
C
Mutually perpendicular to one another
D
Possess extremely small magnitude
Question 2
Any vector in an arbitrary direction can always be replaced by two (or three)
A
Mutually perpendicular vectors which have the original vector as their resultant
B
Parallel vectors which have the original vector as their resultant
C
It is not possible to resolve a vector
D
Arbitrary vectors which have the original vector as their resultant
Question 3
A boy walks uniformally along the sides of a rectangular park of size 400 m × 300 m, starting from one corner to the other corner diagonally opposite. Which of the following statement is incorrect
A
His velocity is not uniform throughout the walk
B
His displacement is 500 m
C
His displacement is 700 m
D
He has travelled a distance of 700 m
Question 4
There are two force vectors, one of 5 N and other of 12 N at what angle the two vectors be added to get resultant vector of 17 N, 7 N and 13 N respectively
A
0°, 90° and 180°
B
0°, 90° and 90°
C
0°, 180° and 90°
D
180°, 0° and 90°
Question 5
How many minimum number of coplanar vectors having different magnitudes can be added to give zero resultant
A
3
B
5
C
2
D
4
Question 6
A particle is simultaneously acted by two forces equal to 4 N and 3 N. The net force on the particle is
A
5 N
B
7 N
C
1 N
D
Between 1 N and 7 N
Question 7
If then angle between is
A
60°
B
45°
C
30°
D
Question 8
A force acting on a body, produces a displacement Work done by the force is?
A
10 units
B
5 units
C
11 units
D
18 units
Question 9
The vector sum of two forces is perpendicular to their vector differences. In that case, the forces
A
Are equal to each other in magnitude
B
Are not equal to each other in magnitude
C
Cannot be predicted
D
Are equal to each other
Question 10
Three concurrent forces of the same magnitude are in equilibrium. What is the angle between the forces ? Also name the triangle formed by the forces as sides

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A
120° equilateral triangle
B
120°, 30°, 30° an isosceles triangle
C
60° equilateral triangle
D
120° an obtuse angled triangle
Question 11
A 150 m long train is moving to north at a speed of 10 m/s. A parrot flying towards south with a speed of 5 m/s crosses the train. The time taken by the parrot the cross to train would be:
A
8 s
B
15 s
C
10 s
D
30 s
Question 12
Two vector A and B have equal magnitudes. Then the vector A + B is  perpendicular to

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A
A x B
B
A – B
C
All of these
D
3A – 3B
Question 13
The sum of two forces acting at a point is 16 N. If the resultant force is 8 N and its direction is perpendicular to minimum force then the forces are
A
8 N and 8 N
B
6 N and 10 N
C
2 N and 14 N
D
4 N and 12 N
Question 14
When three forces of 50 N, 30 N and 15 N  act on a body, then the body is
A
Moving with a uniform velocity
B
Moving with an acceleration
C
In equilibrium
D
At rest
Question 15
The angle between the vectors
A
30°
B
45°
C
90°
D
60°
Question 16
Two equal forces (P each) act at a point inclined to each other at an angle of 120°. The magnitude of their resultant is
A
P / 4
B
2P
C
P
D
P / 2
Question 17
Which of the following is a vector

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A
None of these
B
Pressure
C
Surface tension
D
Moment of inertia
Question 18
A person goes 10 km north and 20 km east. What will be displacement from initial point
A
2 km
B
5 km
C
20 km
D
22.36 km
Question 19
If a body is in equilibrium under a set of non-collinear forces, then the minimum number of forces has to be
A
Two
B
Four
C
Five
D
Three
Question 20
Two cars are moving in the same direction with the same speed 30 km/hr. They are separated by a distance of 5 km, the speed of a car moving in the opposite direction if it meets these two cars at an interval of 4 minutes, will be
A
15 km/hr
B
45 km/hr
C
40 km/hr
D
30 km/hr
There are 20 questions to complete.
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