Deck 3: Physics Pressure, Energy, and Waves

Question 1

Liquid A and liquid B exert same amount of pressure on each other, but the density of A is twice the density of B. The height of liquid B is 10 cm, then the height of liquid A would be

A)5 cm
B)10 cm
C)20 cm
D)40 cm

Answer 1

5 cm

Question 2

Incorrect statement for co-efficient of friction could be that

A)The coefficient of friction is denoted by the Greek letter µ.
B)The coefficient of friction is directly proportional to the force of friction
C)The coefficient of friction is constant even in the conditions of fast slipping and high contact pressure
D)The coefficient of friction is inversely proportional to the force pressing the surfaces together

Answer 2

The coefficient of friction is constant even in the conditions of fast slipping and high contact pressure

Question 3

If we move a positive charge to a positive plate, then potential energy of charge is

A)decreased
B)increased
C)remains constant
D)dissipated

Answer 3

increased

Question 4

An instrument commonly used for the measurement of atmospheric pressure is known as

A)Manometer
B)Barometer
C)Calorimeter
D)Potentiometer

Question 5

Phase difference between a node and an antinode is

A)90°
B)45°
C)180°
D)360°

Question 6

Our weight, as measured by the spring weighing machine is equivalent of

A)The total gravitational force that Earth exerts on us
B)The total centripetal force required to keep us moving on Earth's axis
C)The total gravitational force that Earth exerts on us + The total centripetal force required to keep us moving on Earth's axis
D)The total gravitational force that Earth exerts on us - The total centripetal force required to keep us moving on Earth's axis

Question 7

Point where spring oscillates with maximum amplitude is called

A)node
B)antinode
C)fixed end
D)movable end

Question 8

According to Newton's law of universal gravitation, any two particles of finite mass attract one another with a force which is

A)Inversely proportional to the product of their masses and directly proportional to the square of their distance apart
B)Inversely proportional to the product of their masses and directly proportional to their distance apart
C)Directly proportional to the product of their masses and inversely proportional to their distance apart
D)Directly proportional to the product of their masses and inversely proportional to the square of their distance apart

Question 9

Correct example of vector quantities could be

A)Distance and Speed
B)Displacement and Velocity
C)Distance and Displacement
D)Speed and Velocity

Question 10

In a stationary wave, nodes are at

A)fixed points
B)movable points
C)there are no nodes
D)random points

Question 11

In the formation of stationary waves, at T⁄2 the waves are

A)out of phase
B)in phase
C)diminished
D)twice the amplitude

Question 12

A vector quantity is one which has

A)direction as well as magnitude
B)magnitude only
C)direction only
D)no direction, no magnitude

Question 13

Centripetal force is dependent on three factors, the odd one out of these factors is

A)Mass of the rotating object
B)Speed of the rotating object
C)Volume of the rotating object
D)Path radius

Question 14

Graph of potential energy against distance is

A)curve
B)parabolic
C)hyperbolic
D)straight line

Question 15

On all instruments like measuring cylinder, pipette and burette, readings are always taken at the bottom of the meniscus of liquid. This is not true for liquids like

A)Oil
B)Ink
C)Mercury
D)Seawater

Question 16

In a weather map, lines joining all those regions with same atmospheric pressure are called

A)Bars
B)Millibars
C)Isobars
D)Atmospheric bars

Question 17

For a given system, the minimum frequency of a standing wave is in a

A)fundamental mode
B)lowest mode
C)highest mode
D)peak mode

Question 18

In an electric field, energy per unit positive charge is

A)voltage
B)current
C)frequency
D)resistance

Question 19

In Kundt's dust tube, dust accumulates at

A)nodes
B)antinodes
C)at the end
D)at troughs only

Question 20

A node having twice the frequency of the fundamental is called

A)half harmonic
B)harmonic
C)double harmonic
D)triple harmonic

Question 21

If frequency of certain wave is f, then it's velocity is {{}}

A)v = fλ
B)v = T⁄λ
C)t²
D)1⁄t²

Question 22

Origin of gravitational field is

A)charges
B)masses
C)Earth's core
D)matter

Question 23

At separation between a node and antinode, wavelength becomes

A)λ
B)λ⁄2
C)λ⁄4
D)2λ

Question 24

If the plates of capacitor are oppositely charged then the total charge is equal to

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

Question 25

Area under current-time graph represents

A)magnitude of charge
B)dielectric
C)amount of positive charge
D)amount of negative charge