Which of the following is not a unit of length?

A. Light year
B. Radian
C. Angstrom
D. Micron

The vector A= 2i^+2j^ makes_______ angle with x-axis.?

A. 30°
B. 45°
C. 60°
D. 90°

The mass of Platinum cylinder kept near Paris is________?

A. 1 gram
B. 1 kg
C. 100 kg
D. None

Which of the following can not be the resultant of two vectors having magnitude 10N and 15N?

A. 18n
B. 22n
C. 25n
D. 30n

What is wavelength of visible spectrum?

A. 8500 – 9800 angstrom
B. 7800 – 8000 angstrom
C. 3900 – 7600 angstrom
D. 1300 – 3000 angstrom

If a vector Ā is making an angle “∅” with positive y-axis then which of the following is correct.?

A. Ax= acos∅
B. Ay= asin∅
C. Ay= acos∅
D. None

If the distance-time graph gives a straight line then body possesses___________?

A. Zero velocity
B. Uniform velocity
C. Variable velocity
D. None

Mach is the unit of measurement in stating the speed of a moving object in relation to__________?

A. The speed of sound
B. The speed of other object
C. The speed of light
D. The speed of air resistance

Study of sound is called _____________?

A. Soundlogy
B. Acoustics
C. Neurology
D. Physiology

What is the SI unit of acceleration is ___________?

A. Meter per secound
B. Meter per second square
C. Both
D. All