One of the combinations from the fundamental physical constants is \({{hc}\over{G}},\) The unit of this expression is

(a)

Kg²

(b)

m³

(c)

S^-1

(d)

m

Which of the following has the highest number of significant figures?

(a)

0.007 m²

(b)

2.64\(\times\)10²⁴kg

(c)

0.0006032 m²

(d)

6.3200 J

Which of the following pairs of physical quantities have same dimension?

(a)

force and power

(b)

torque and energy

(c)

torque and power

(d)

force and torque

The velocity of a particle v at an instant t is given by v = at + br². The dimensions of b is

(a)

[L]

(b)

[LT^-1]

(c)

[LT^-2]

(d)

[LT^-3]

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

(a)

0.04

(b)

0.4

(c)

40

(d)

400

The dimension of \({\left( {\mu}_{0}{\epsilon}_{0} \right)}^{{{1}\over{2}}}\) is

(a)

length

(b)

time

(c)

velocity

(d)

force

A length-scale (I) depends on the permittivity (e) 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 I is dimensionally correct?

(a)

\(l=\sqrt{{{nq^2}\over{\epsilon {k}_{B}T}}}\)

(b)

\(l=\sqrt{{{\epsilon {k}_{B}T}\over{nq^2}}}\)

(c)

\(l=\sqrt{{{q^2}\over{e{n}^{{{2}\over{3}}}{k}_{B}}T}}\)

(d)

\(l=\sqrt{{{q^2}\over{\epsilon n{k}_{B}T}}}\)

The word scientia is meaning to ___________.

(a)

exact

(b)

to know

(c)

control

(d)

implement

Microscopic group of Physics dealt with the study of ____________.

(a)

classical physics

(b)

statistical mechanics

(c)

fluid mechanics

(d)

quantum physics

What is the range of astronomical time scales to microscopic scales?

(a)

10¹⁵S to 10^-15S

(b)

10⁹S to 10^-18S

(c)

10¹⁸S to 10^-22S

(d)

10¹¹S to 10^-16S

Which unit is used to measure size of a nucleus?

(a)

Angstrom

(b)

Micron

(c)

Nano

(d)

Fermi

The accleration of 20 m/s² in km/h² is ______________.

(a)

2.59 \(\times\) 10⁵ km/h²

(b)

1.29 \(\times\) 10⁵ km/h²

(c)

2.0 \(\times\)10³ km/h²

(d)

3.5 \(\times\)10⁵ km/h²

Which of the following statement is wrong?

(a)

one fenni = 10¹⁵ m

(b)

All non-zero digits are significant.

(c)

1 AU = 1.496 \(\times\)10¹¹m

(d)

Speed is a derived unit

The number of significant figures in 2.64\(\times\)10⁴ kg is ______________.

(a)

2

(b)

4

(c)

5

(d)

3

The density of a cube is measured by measuring its mass and length of its side. If the maximum error in the measurement of mass and length are 5% and 3% respectively, the maximum error in the measurement of density is _____________.

(a)

9%

(b)

8%

(c)

14%

(d)

2%

Find the value of one Au in 1000km _____________.

(a)

1.5 \(\times\)10⁵m

(b)

2.5\(\times\)10⁶m

(c)

1.5\(\times\)10¹¹m

(d)

2.5\(\times\)10¹⁰m

How many \(\mu\)m present in one metre?

(a)

10^-6 \(\mu\)m

(b)

10⁶ \(\mu\)m

(c)

10^-3 \(\mu\)m

(d)

10^-2 \(\mu\)m

The speed of an object v = 90km/h. The same quantity of speed in m/s is ______________.

(a)

90

(b)

25

(c)

45

(d)

180

The angle of an object is 18.2°. What is the angular diameter of the object in radians?

(a)

36.4 rad

(b)

3.64\(\times\)10^-2 rad

(c)

31.74\(\times\)10^-2 rad

(d)

3.17 rad

The mass of an iron sheet is 0.250 kg and volume of the sheet is 1.5m³ Then what is the density of the iron sheet? Express the result in SI unit system.

(a)

0.267 kg m^-3

(b)

0.167 kg m^-3

(c)

0.255 kg m^-3

(d)

0.285 kg m^-3

A scientific way of doing things involve _____________.

(a)

identifying the problem

(b)

collecting data

(c)

controlled experimentation

(d)

all the above

Which of the following is true regarding the physical science?

(a)

dealing with non-living things

(b)

dealing with living things

(c)

study with atomic level

(d)

both (a) and (b)

The branch of physics deals with the relation between space, time and energy are _______________.

(a)

astrophysics

(b)

relativity

(c)

acoustics

(d)

atomic physics

Round of the following number 19.95 into three significant figures.

(a)

19.9

(b)

20.0

(c)

20.1

(d)

19.5

The value of one Angstrom is _______________.

(a)

10¹⁰m

(b)

10^-10m

(c)

10^-8m

(d)

10^-15m