Category: Physics

No.	Topics.	No.	Topics.
1.	CURRENT ELECTRICITY	2.	DAWN OF MODERN PHYSICS
3.	ELECTROMAGNETIC INDUCTION	4.	ELECTROMAGNETISM
5.	ELECTRONICS	6.	ELECTROSTATICS
7.	FORCE AND MOTION	8.	NUCLEAR PHYSICS
9.	ROTATIONAL AND CIRCULAR MOTION	10.	SPECTRA SPECTRA
11.	THERMODYNAMICS	12.	VECTORS AND EQUILIBRIUM
13.	WAVES

The resultant of vector A=10 units at 270° and B=10 units at 180° has a magnitude of…

0 units
10 units
20 units
14.1 units

To nullify the vector A = (-4i – 6j), one must add the vector…

(-4i – 6j)
(4i + 6j)
(4i – 6j)
(-4i + 6j)

A vector of magnitude 8 units lies in the 3rd quadrant, making an angle of 60° with the negative x-axis. Its components are approximately…

(-4, -6.9)
(-6.9, -4)
(4, 6.9)
(-6.9, 4)

Two forces F1=20N at 45° and F2=20N at 135° act on a body. The resultant force vector is…

40j N
28.3j N
20j N
20i N

If Rx = Rcosφ, then φ must be the angle between the vector R and the…

y-axis
x-axis
z-axis
origin

A person pulls a box with a force of 50 N at an angle of 30° above the horizontal. The effective force pulling the box horizontally is…

25.0 N
50.0 N
43.3 N
30.0 N

If vector R = A + B, and R = A – B in magnitude, then…

B must be a null vector
A and B must be perpendicular
A must be a null vector
A and B must be parallel

A plane flies at 100 m/s East while a crosswind blows at 100 m/s North. The plane’s resultant speed is approximately…

200 m/s
0 m/s
141 m/s
100 m/s

A force of 10 N acts at 30° and another force of 10 N acts at 150°. The resultant has a magnitude of…

20 N
10 N
0 N
10√3 N

A vector has components (1, √3). The angle it makes with the x-axis is…

30°
45°
60°
90°

The resultant of three vectors of magnitude 3, 4, and 5 can be zero if they are arranged…

along the sides of a right-angled triangle
along a straight line
in any random direction
It is not possible for the resultant to be zero

The magnitude of the resultant force from the previous two questions (Rx=-10, Ry=-20) is approximately…

30.0 N
10.0 N
22.4 N
15.0 N

A force F1 is 20 N at 270°. A force F2 is 10 N at 180°. The x-component of their resultant is…

-10 N
-20 N
10 N
30 N

The y-component of the resultant of the forces in the previous question is…

-10 N
-20 N
-30 N
10 N

A vector has a magnitude of 13 units and its x-component is -5 units. Its y-component could be…

12 units
8 units
18 units
144 units

If the resultant of two vectors is to have the maximum possible magnitude, the angle between them must be…

180°
90°
45°
0°

A man walks 6 m East, then 6 m North. His resultant displacement vector can be described as having a magnitude of…

12 m
6 m
6√2 m
0 m

If vector A = (6i – 8j), then the vector B = -A/2 is…

(-3i + 4j)
(3i – 4j)
(-12i + 16j)
(12i – 16j)

A displacement vector D1 is 10 m North. A displacement vector D2 is 20 m at 30° East of North. The x-component of the resultant displacement is…

10 m
17.3 m
20 m
30 m

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