NEW
Font size
WorksheetsNature Of Physical World And Measurement.
Total questions: 25
Worksheet time: 13mins
One of the combinations from the fundamental physical constants is hc/G. The unit of this expression is_________
kg2
m3
m
s -1
If the error in the measurement of radius is 2% , then the error in the determination of volume of the sphere will be___________
8%
2%
6%
4%
If the length and time period of an oscillating pendulum have errors of 1% and 3% respectively then the error in measurement of acceleration due to gravity
6%
7%
5%
4%
The length of a body is measured as 3.51 m , if the accuracy is 0.01m, then the percentage error in the measurement is
351%
0.28%
0. 035 %
1%
Which of the following has the highest number of significant figures?
0.0006032 m 2
0.007 m2
6.3200 J
2.64 x 10 24 kg
If π = 3.14 , then the value of π^2 is
9.8596
9.86O
9.86
9.9
The name Physics was introduced by _______ in the year 350 BC .
Albert Einstein
Walton
Egyptians
Aristotle
What is the value of mass of known observable universe ?
10 45 kg
10 48 kg
10 53 kg
10 55 kg
Which of the following quantity is not a fundamental quantity?
luminous intensity
mass
volume
time
What is the unit of linear momentum?
kg m s -1
kg m s
kg m 2 s
kg m -2 s
What is the unit of Planck's constant ?
J /s
J s
J s 2
J /s 2
The symbol for tera is ________
E
R
T
A
The value of one angstrom is ______
(10 -20) m
(10 -10) m
(10 -30) m
(10 -40)m
State the number of significant figures in the following numbers
a) 27 b) 3
a) 3 b) 3
a) 3 b) 1
a) 27 b) 1
Round off the following numbers as indicated {A} 19.45 upto 3 digits {B} 248337 up to 3 digits
a) 19.3 b) 248300
a) 19.4 b) 248000
a) 19.4 b) 248300
a) 19.3 b) 248300
Which of the following pairs of physical quantities have same dimension ?
force and power
torque and energy
torque and power
force and torque
The dimensional formula of Planck's constant h is _____________.
[ML2T -1 ]
[ML2 T -3]
[MLT-1 ]
[ML3 T-3]
The velocity of a particle v at an instant t is given by v = at +bt 2 . The dimensions of b is
[L]
[LT-1]
[LT-2]
[LT-3]
The dimensional formula for gravitational constant G is ________.
[ML3 T-2 ]
[M-1L3 T-2]
[M-1L-3 T-2]
[ML-3 T2 ]
The density of a material in CGS system of units is 4 g cm -3. In a system of units in which unit of length is 10 cm and unit of mass is 100 g, then the value of density of material will be
0.04
0.4
40
400
If the force is proportional to square of velocity, then the dimension of proportionality constant is ?
[MLT 0 ]
[MLT -1]
[ML-2T ]
[ML-1T0 ]
The dimension of ( µ 0 ε 0 ) -1/2 is
length
time
velocity
force
Planck’s constant (h), speed of light in vacuum (c) and Newton’s gravitational constant (G) are taken as three fundamental constants. Which of the following combinations of these has the dimension of length ?
A length-scale (l) depends on the permittivity (ε) of a dielectric material, Boltzmann constant (kB ), the absolute temperature (T), the number per unit volume (n) of certain charged particles,and the charge (q) carried by each of the particles. Which of the following expression for l is dimensionally correct?.
The Dimension of Boltzmann constant is _________________.
[ML2 T–2 K–1]
[ML2 T2 K1]
[ML-2 T 2 K–1]
[ML-2 T–2 K–1]
