Assignment Physics
Choose the right answer to the questions:
1- The speed v=
(a)
distanc
( b)displacement/time
time
(c) velocity
2- The Mass is measured in SI unit by
(a)
meter
(b) Kilograms
(c)n gram
3-It represents a number as the product of a number greater than 1 and less than 10 and a
power of 10 is
(a) mantissa
(b) scientific notation
(c) exponent
4- A number greater than 1 and less than 10 is
(a) mantissa
(b) scientific notation
5- The numbers of significant figures are numbers of
(a) leading zeros
(b) Trailing zeros
6- The result of two significant figures have
(a) more than you start
(c) exponent
(c) the exponent
(b) corresponds to the less number
(c) greater
7- meter , kilogram and second are
(a) Basic unit
(b) Derived unit
(c) a and b
8- The sing of International System is
(a) SI
(b) MKS
(c) a and b
9- The unit system CGS is the sing of
(a) French system
(b) SI system
(c) British system
10- The Dimensional Analysis of length .mass and time is
(a) MKS
(b) MLS
(c) LMT
11- Quantity that has only magnitude and no direction is
(a) a scalar
(b) vector
(b) vector and scalar
12- Quantity that has both magnitude and direction is
(a) a scalar
(b) vector
(b) vector and scalar
13- All this quantity is a scalar expect
(a) distance
(b) speed
(c) velocity
14- All this quantity is a vector expect
(a) displacement
(b)
force
(c) mass
15- Vector in three dimensions can be specified by their three component
(a) A =Ax .Ay .Az
(b) A= i .j .k
(c) A . B. C
16-Vector can be added or subtracted in Cartesian components
(a)A+B=(Ax+Bx)I +(Ay+By)j
(b) A-B= (Ax-Bx)i+(Ay-By)j
(c) a and b
17-Unit Vector are vectors of length
(a) two
(b) one
(c) no length
18- The length of a two dimensional vector
(b) A=𝐴2𝑦 +𝐴2𝑥
(a) A=√𝐴2𝑥 + 𝐴2𝑦
(c) A= Ai +Aj
19- The direction of two –dimensional vector
(a) tanθ =x/y
(b) sin θ =y/x
( c) θ=tan-1 y/x
20-The addition of two vectors is a……………………..operation
(a)opposite direction
(b)commutative
(c) subtraction
21-The result of scalar product or dot product is
(a) number
(b) vector
(c) exponent
22- For cross product , we have i
Χi=jΧj=kΧk=
(a) one
(b) –j
(c) zero
23-The dot product of A and B has the maximum value in case of
(a) θ=90
(b) θ=0
(c) θ=180
25-The vector to be perpendicular to the plane formed by the vector A and B is
(a) scalar
(b) quantity
(c) normal vector