421. The angle subtended at the center of a circle by an arc of length 1/360 of the circumference of the circle is known as:
A. Minute
B. Second
C. Degree
D. Radian
422. The sum (10.1 + 20.54 + 30.555) cm up to correct significant figures is:
A. 61.195 cm
B. 62 cm
C. 61.2 cm
D. 61.29 cm
423. Which of the following relation is dimensionally correct?
A. 5 KM = 5000 s
B. 5 KM = 500 m
C. 5 KM = 50 kg
D. 5 M = 500 S
424. The density of the air is 1.2 kg/m³. This density in the CGS system is:
A. 1.2 mg/cm³
B. 1.2 g/cm³
C. 2.3 g/cm³
D. 6.4 g/cm³
425. Absolute uncertainty is equal to:
A. Least count of apparatus
B. Half of the least count of apparatus
C. Double of the least count of apparatus
D. Depends upon systematic error
426. The number of significant figures in the measurement x = 10.00300 cm are:
A. 7
B. 8
C. 5
D. 2
427. If “p” is the momentum of an object of mass “m,” the expression p²/m has the base unit identical to:
A. Energy
B. Force
C. Power
D. Velocity
428. Which pair includes a scalar quantity and a vector quantity:
A. K.E and momentum
B. P.E and Work
C. Velocity and acceleration
D. Weight and force
429. The percentage uncertainty in a reading 2.50 m is:
A. 0.2%
B. 0.1%
C. 0.5%
D. 0.4%
430. What is the unit of volume?
(A) Force
B) Cubic Meter
(C) Second
(D) Meter
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