Free Printable Sr.eTechno 17.5.2020

1.

Work done by a Force on a Body can be

a)

Positive

b)

Negative

c)

Zero

d)

None

2.

Unit of Work done

a)

joule , erg

b)

Nm , dynecm

c)

eV

d)

kWh

3.

Which of the following are True

a)

1kWh=3.6x10⁵J

b)

1eV=1.6x10^-18J

c)

1kWh=3.6x10¹³erg

d)

1eV=1.6x10^-12erg

4.

A spring of natural length CB is extended upto A(As shown in the picture),If the spring constant is 'K',then energy stored in the spring due to extension is

a)

$\frac{\pi^2Kr^2}{8}$

b)

$\frac{\pi^2Kr^2}{4}$

c)

$\frac{\pi^2Kr^2}{2}$

d)

$\frac{Kr^2}{2}$

5.

A block is displaced from $\left(\ 2\overrightarrow{i\ \ }+3\ \overrightarrow{j}-4\ \overrightarrow{k\ \ }\right)$ m to $\left(\ 1\overrightarrow{i\ \ }+4\ \overrightarrow{j}+6\ \overrightarrow{k\ \ }\right)$ m under the application of constant force $\left(\ 6\overrightarrow{i\ \ }-2\ \overrightarrow{j}+1\ \overrightarrow{k\ \ }\right)$ N,then work done by this force is

a)

2J

b)

-2J

c)

-9J

d)

-5J

6.

which of the following are False

a)

$\ \overrightarrow{i\ \ }\times\ \overrightarrow{i}\ =\ \overrightarrow{j\ \ }\ \ \&\ \ \ \overrightarrow{i\ \ }\cdot\ \overrightarrow{i}\ =0$

b)

$\ \overrightarrow{i\ \ }.\ \overrightarrow{i}\ =\ 1\ \ \ \&\ \ \ \overrightarrow{i\ \ }\cdot\ \overrightarrow{j}\ =0$

c)

$\ \overrightarrow{\tau\ \ }=\ \overrightarrow{r\ \ }\ \times\overrightarrow{F}\ \ \ \&\ \ \overrightarrow{V\ \ }=\ \overrightarrow{r\ \ }\ \times\overrightarrow{\omega}\$

d)

$\ \overrightarrow{L\ \ }=\ \overrightarrow{r\ \ }\ \times\overrightarrow{P}\ \ \ \&\ \ \overrightarrow{V\ \ }=\ \overrightarrow{r\ \ }\ \times\overrightarrow{\omega}\$

7.

The cosine of angle between $\left(\overrightarrow{A\ }\ \times\overrightarrow{B\ }\ \right)\&\ \ \left(\overrightarrow{B\ }\ \times\overrightarrow{A\ }\right)$ is ( Where $\overrightarrow{A}\ \&\ \overrightarrow{B}\$ are Non-Zero Co-planar Vectors)

a)

$180^0$

b)

$90^0$

c)

0

d)

-1

8.

Scalar product obeys

a)

Commutative Law

b)

Distributive law

c)

Associative Law

d)

Parallelogram Law

9.

which of these yields a result of Zero(0).

a)

Dot Product of two Orthogonal

b)

Cross Product of two Orthogonal Vectors

c)

Dot Product of two Parallel Vectors

d)

Cross Product of two Parallel Vectors

10.

Maximum & Minimum Values of Dot Product & Cross Product between any two Non Zero Vectors

a)

(0 & +1) & (0 & +1)

b)

(+1 & 0) & (+1 & 0)

c)

(-1 & +1) & (-1 & +1)

d)

(+1 & -1) & (+1 & -1)

Sr.eTechno 17.5.2020

Total questions: 10

Worksheet time: 10mins

Similar Resources on Wayground