Which of the following is a more accurate measuring instrument?
Metre Scale
Vernier Calipers
Screw Guage
Both screw guage and vernier calipers
In a vernier callipers, one main scale division is x cm and n divisions of the vernier scale coincide with (n -1) divisions of the main scale.The least count (in cm ) of the callipers is :
(n - 1/ n)x
nx / (n -1)
x / n
x / (n -1 )
One a m u is equal to
1.66 x 10 -27 kg
1.66x10-24kg
1.66x10-31kg
1.66x10-19kg
The dimensional formula of torque is:
M1L2T-2
ML-1T-1
M2LT-1
M2L2T2
In an experiment the angles are required to be measured using an instrument.29 divisions of the main scale exactly coincide with the 30 divisions of the vernier scale.If the smallest division of the main scale is half - a - degree (= 0.5°), then the least count of the instrument is
one minute
half minute
one degree
half degree
The photograph of a house occupies an area of 1.75 cm2 on a 35 mm slide.The slide is projected on to a screen,and the area of the house on the screen is 1.55 m2.What is the linear magnification of the projector,screen arrangement?
94.1
9.41
0.941
0.0094
The time period of a simple, pendulum is given by Tαla gh . The value of a and b are
1, ½
½, -1
½, -½
½,½
The number of significant figures in 0.00097 are
5
4
6
2
The SI unit for length is
Kilometer
foot
meter
centimeter
Which of the following has the dimensions of work?
Force
Velocity
Kinetic energy
Momentum
