Deck 11: Satellites, Gravitational Fields, and Gases

Question 1

Number of satellites in geostationary orbits are

A)100
B)200
C)300
D)400

Answer 1

300

Question 2

Geostationary satellites have lifetime of nearly

A)20 years
B)10 years
C)50 years
D)60 years

Answer 2

10 years

Question 3

Time taken to complete a revolution around a planet is called

A)orbital period
B)time period
C)frequency
D)wavelength

Answer 3

orbital period

Question 4

As distance increases, value of gravitational field strength

A)also increases
B)decreases
C)remains constant
D)may increase or decrease

Question 5

All objects are attracted towards

A)center of Earth
B)sun
C)mars
D)moon

Question 6

Satellite around Earth follows a circular path because

A)gravitational force is parallel to velocity
B)gravitational force is anti parallel to velocity
C)gravitational force is perpendicular to velocity
D)gravitational force is anti perpendicular to

Question 7

Each 1 kg mass experiences force of

A)7 N
B)9.81 N
C)20 N
D)100 N

Question 8

Gravitational potential is always

A)infinite
B)zero
C)positive
D)negative

Question 9

The closer satellite is to Earth, its speed should be

A)more fast
B)more slow
C)zero
D)any constant value

Question 10

Normal force exerted per unit area by gas on walls of container is

A)temperature
B)energy
C)pressure
D)friction

Question 11

Surface area of a typical person is about

A)1 m²
B)2 m²
C)3 m²
D)4 m²

Question 12

If we double the temperature of an ideal gas, then it's average kinetic energy will be

A)halved
B)triple the original
C)fourth times of original
D)doubled

Question 13

Escape velocity for a particle is about{{}}

A)5 km s^-1
B)8 km s^-1
C)11 km s^-1
D)14 km s^-1

Question 14

Force exerted on a person by atmosphere is

A)200 000 N
B)300 000 N
C)400 000 N
D)500 000 N

Question 15

10 mole of carbon contains

A)6.02 × 10 ²⁴ atoms
B)6.03 × 10 ²³ atoms
C)6.02 × 10 ²³ atoms
D)6.04 × 10 ²⁴ atoms

Question 16

Space occupied by gas is

A)area
B)volume
C)space
D)mass

Question 17

At absolute zero, volume of gas is equal to

A)0 m³
B)1 m³
C)2 m³
D)3 m³

Question 18

Number of moles in 1.6 kg of oxygen is

A)30 mol
B)50 mol
C)40 mol
D)60 mol

Question 19

Quantity R/NA defines

A)Plank's constant
B)Boltzmann constant
C)gravitational constant
D)Avagadro's constant

Question 20

Molar gas constant has value {{}}

A)7 J mol ^-1 K^-1
B)8 J mol ^-1 K^-1
C)8.31 J mol ^-1 K^-1
D)5 J mol ^-1 K^-1

Question 21

If average kinetic energy of molecules is higher, then temperature of gas is

A)high
B)low
C)zero
D)infinite

Question 22

The ideal gas equation is

A)PV = constant
B)PT = constant
C)V⁄T
D)PV = nRT

Question 23

Graph of p against 1⁄V is

A)curve
B)straight line
C)parabola
D)hyperbola

Question 24

Gases deviate from gas laws at

A)high temperature only
B)low pressure only
C)high pressure and low temperature
D)low temperature only

Question 25

Law which relates pressure and volume of gas is

A)Charles's law
B)Avogadro's law
C)Boyle's law
D)ideal gas law