Mathematics In Physics Test

Result

Mathematics In Physics Test - 21

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Weekly Quiz Competition

Question 1
1 / -0

Angular momentum is

A
A scalar

B
A polar vector

C
An axial-vector

D
None of these

Solution

Angular momentum represents a rotational effect hence it is an axial vector.
Question 2
1 / -0

If then which of the following is NOT correct?

A

B

C

D

Solution

The sum of the vectors cannot be equal to the sum of their unit vectors.
Question 3
1 / -0

Which of the following is a scalar quantity

A
Displacement

B
Electric field

C
Acceleration

D
Work

Solution

Displacement, electric field, and acceleration are vector quantities.
Question 4
1 / -0

There are two force vectors, one of 5N and the other of 12N. At what angle should the two vectors be added to get the resultant vector of 17N, 7N, and 13N, respectively:

A
0°, 180° and 90°

B
0°, 90° and 180°

C
0°, 90° and 90°

D
180°, 0° and 90°

Solution

For 17 N both the vector should be parallel i.e., the angle between them should be zero.

For 7 N both the vectors should be antiparallel i.e., the angle between them should be 180°.

For 13 N both the vectors should be perpendicular to each other i.e., the angle between them should be 90°
Question 5
1 / -0

If then magnitude and direction of will be

A

B

C

D

Solution
Question 6
1 / -0

If a particle moves from point P(2,3,5) to point Q(3,4,5). Its displacement vector be

A

B

C

D

Solution
Question 7
1 / -0

If vectors are equal vectors, then the value of α is:

A
-5

B
2

C
-3

D
4

Solution

Since vectors are equal,
Question 8
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A plane is revolving around the earth with a speed of 100 km/hr at a constant height from the surface of the earth. The change in the velocity as it travels half-circle is:

A
200 km/hr

B
150 km/hr

C
100√2 km/hr

D
0

Solution
Question 9
1 / -0

A particle moves from position null to due to a uniform force ofIf the displacement is in m, then the work done will be:

A
100 J

B
200 J

C
300 J

D
250 J

Solution
Question 10
1 / -0

If for two vectors then the vectors:

A
are perpendicular to each other.

B
are parallel to each other.

C
act at an angle of 60°.

D
act at an angle of 30°.

Solution

Two vectors will be parallel to each other.