Physical World Test

Result

Physical World Test - 29

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Weekly Quiz Competition

Question 1
1 / -0

Nano science is the study of fundamental principles that nature permits at the nanoscale or less than that $$i e . . . . . . . . . . . .$$

A
The classical mechanics

B
the wave mechanics

C
The quantum mechanics

D
none of these

Solution

$$\begin{array}{l}\text { Nano science PS the Study of fundamental princep les that } \\\text { nature permits at the nano scale or less than that } 1 . e \\\text { quantum mechanies. }\end{array}$$
Question 2
1 / -0

Which of these is incorrect about nuclear forces ?

A
They are independent of charge

B
Nuclear forces are derived from quark-quark interaction

C
Hadrons do experience strong nuclear force

D
Nuclear force is not central force

Solution

$$\begin{array}{l}\text { Hadrons are subatomic composite porticle made of two(or) } \\\text { more quarks. They experpance strong nuclear force. }\end{array}$$
Question 3
1 / -0

Which of the following is not a research purpose?

A
triangulation

B
explanation

C
description

D
exploration

Solution
Question 4
1 / -0

If the doors of a refrigerator are left open for a few hours, the room temperature will?

A
Decrease

B
Increase

C
Remain the same

D
Decrease only in the area in the vicinity of the refrigerator
Question 5
1 / -0

$$Fg,Fe$$ and $$Fn$$ represent the gravitational, electromagnetic and nuclear forces respectively, then arrange them in increasing order of their strengths

A
$${F}_{n}<{F}_{e}<{F}_{g}$$

B
$${F}_{g}<{F}_{e}<{F}_{n}$$

C
$${F}_{e}<{F}_{g}<{F}_{n}$$

D
$${F}_{g}<{F}_{n}<{F}_{e}$$

Solution

$$\begin{array}{l}\text { Among gravitational, electromagnet } \text { and nuclear forces } \\\text { Nuclear force is strongest and gravitational is the wearest } \\\text { force. } \\\text { So } F_{g}<F_{e}<F_{n}\end{array}$$
Question 6
1 / -0

"The three most important inventions of this century are the nuclear bomb, the high yield hybrid speed, and the computer". Can you name the person who made this statement?

A
Harry R Jordan

B
Buckminster Fuller

C
Jack Smith

D
Jan Timmer

Solution
Question 7
1 / -0

In the given figure $$Y$$, magnet $$P$$ is experiencing ____
(1) Magnetic force of repulsion (2) Magnetic force of attraction
(3) Elastic spring force (4) Gravity

A
1 and 3 only

B
1 and 4 only

C
2 and 3 only

D
2 and 4 only

Solution

$$\begin{array}{l}\text { Since like poles repul's each other the magnetic force } is \\\text { Pushing magnet } P \text { always, but due to gravity the weight }\end{array}$$
$$\begin{array}{l}\text { act's downward so it will reach an equilibrium position } \\\text { where net force on magnet p is zero. }\end{array}$$
Question 8
1 / -0

Choose the wrong statement :

A
The nuclear force becomes weak if the nucleus contains too many protons compared to the number of neutrons

B
The nuclear force becomes weak if the nucleus contains too many neutrons compared to the number of protons

C
Nuclei with atomic number greater than $$82$$ show a tendency to disintegrate

D
The nuclear force becomes very strong if the nucleus contains a large number of nucleons

Solution

$$\begin{array}{l}\text { The nuclear force becomes weak if the nucleus contains } \\\text { a large number of nucleons. } \\\text { A nucleous with high number of nucleons is unstable. }\end{array}$$
Question 9
1 / -0

When a vander waal's gas undergoes free expansion then its temperature

A
Decreases

B
Increases

C
Does not change

D
Depends upon the nature of the gas

Solution

$$\begin{array}{l}\text { when a vander waal's gas undergoes free expansion } \\\text { then its temperature decreases. }\end{array}$$
Question 10
1 / -0

Sampling allows survey of large populations using questionnaires interviews provide in depth responses is called

A
Experiment

B
Survey

C
Observation

D
Analysis

Solution

User

Question Analysis

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Re-Attempt Weekly Quiz Competition

Physical World Test - 29

Result

Physical World Test - 29

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Rank

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SHARING IS CARING

Question 1

The classical mechanics

the wave mechanics

The quantum mechanics

none of these

Solution

Question 2

They are independent of charge

Nuclear forces are derived from quark-quark interaction

Hadrons do experience strong nuclear force

Nuclear force is not central force

Solution

Question 3

triangulation

explanation

description

exploration

Solution

Question 4

Decrease

Increase

Remain the same

Decrease only in the area in the vicinity of the refrigerator

Question 5

$${F}_{n}<{F}_{e}<{F}_{g}$$

$${F}_{g}<{F}_{e}<{F}_{n}$$

$${F}_{e}<{F}_{g}<{F}_{n}$$

$${F}_{g}<{F}_{n}<{F}_{e}$$

Solution

Question 6

Harry R Jordan

Buckminster Fuller

Jack Smith

Jan Timmer

Solution

Question 7

1 and 3 only

1 and 4 only

2 and 3 only

2 and 4 only

Solution

Question 8

The nuclear force becomes weak if the nucleus contains too many protons compared to the number of neutrons

The nuclear force becomes weak if the nucleus contains too many neutrons compared to the number of protons

Nuclei with atomic number greater than $$82$$ show a tendency to disintegrate

The nuclear force becomes very strong if the nucleus contains a large number of nucleons

Solution

Question 9

Decreases

Increases

Does not change

Depends upon the nature of the gas

Solution

Question 10

Experiment

Survey

Observation

Analysis

Solution

User

Question Analysis

My Perfomance

Score

-

Rank

-

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