Physics(Objective) #Part 1

1-A precise instrument is the one which has?

a. Less fractionaly uncertainty
b. Less absolute uncertainty
c. Less uncertainty
d. Less percentage uncertainty

2-How many significant figures are there in 900.05?

a. 3
b. 4
c. 5
d. None of these

3-Lenght, mass, time, electric current, temprature, luminous intensity and amount of substance are called?

a. International system
b. Derived quantities
c. Basic quantities
d. Dimentions

4-Written in standard scientific notation number of significant figures in 4.000*103

a. 1
b. 2
c. 3
d. 4

5-Dimention of solid angle?

a. 1
b. M
c. S
d. 0

6-Which of the following has no units?

a. Thermal capacity
b. Magnetic susceptibility
c. Angular accelration
d. Moment of a magnet

7-What is the SI unit for thermodynamic temprature?

a. Centigrade
b. Fahrenheit
c. A & B both
d. None of these 

8-Which one among the following quantities is a dimensional constant?

a. Speed of light in free space
b. Viscosity of water
c. Ratio of specific heats of a gas
d. Force

9-If the product of muscle and speed equals power,what does muscle stand for?

a. Force
b. Power
c. Energy
d. Momentum

10-What is the unit for Electric Charge?

a. Watt
b. Coulumb
c. Ampere
d. Joule

11-What is SI unit of Solid angle?

a. Degree
b. Radian
c. Kilogram
d. Steradian

12-Conducting an experiment once using a faulty instrument is likely to be affected by which type of error?

a. Random error
b. Systematic error
c. Both 
d. None of these

13-Rectangular coordinate system is also called?

a. Polar coordinate system
b. Cartesian coordinate system
c. Cylindrical coordinate system
d. Space coordinate system

14-In which quandrant the two rectangular component of a vector have same sign?

a. 1st
b. 3rd
c. 4th
d. Both a & b

15-The direction of a vector in space is specified by?

a. One angle
b. Two angles
c. Three angles
d. Four angles

16-The angle between A * B and B * A is?

a. 0 degree
b. 90 degree
c. 180 degree
d. 270 degree

17-A body in equilibrium is?

a. Always at rest
b. At rest or has uniform velocity
c. At rest or has uniform acceleration
d. At uniform acceleration

18-Two forces 5N and 7N are acting on a point. Which of the following cannot be their resultant force?

a. 1N
b. 3N
c. 7N
d. 8N

19-The angle between z axix and the vector i + j + 2k is?

a. 30 degree
b. 45 degree
c. 60 degree
d. 90 degree

20-Null vector is?

a. Parallel to every vector
b. Perpendicular to every vector
c. Both A & B
d. Is inverse of every vector