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Tamil Nadu Board 11th Standard Physics - Unit 1: Book Back Answers and Solutions
This post covers the book back answers and solutions for Unit 1 – Physics from the Tamil Nadu State Board 11th Standard Physics textbook. These detailed answers have been carefully prepared by our expert teachers at KalviTips.com.
We have explained each answer in a simple, easy-to-understand format, highlighting important points step by step under the relevant subtopics. Students are advised to read and memorize these subtopics thoroughly. Once you understand the main concepts, you’ll be able to connect other related points with real-life examples and confidently present them in your tests and exams.
By going through this material, you’ll gain a strong understanding of Physics Unit 1 along with the corresponding book back questions and answers (PDF format).
Question Types Covered:
- 1 Mark Questions: Choose the correct answer, Fill in the blanks, Identify the correct statement, Match the following
- 2 Mark Questions: Answer briefly
- 3, 4, and 5 Mark Questions: Answer in detail
All answers are presented in a clear and student-friendly manner, focusing on key points to help you score full marks.
All the best, Class 11 students! Prepare well and aim for top scores. Thank you!
Unit 1:Nature of Physical World And Measurement
I. Multiple Choice Questions
1.One
of the combinations from the fundamental physical constants is
The
unit of this expression is
a)
kg2
b)
m 3
c)
s -1
d)
m
Answer
Key:
a) kg2
2.
If the error in the measurement of radius is 2%, then the error in the determination
of volume of the sphere will be
a)
8%
b)
2%
c)
4%
d)
6%
Answer
Key:
d)
6%
3.
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
is
a)
4%
b)
5%
c)
6%
d)
7%
Answer
Key:
d)
7%
4.
The length of a body is measured as3.51 m, if the accuracy is 0.01m, then the percentage
error in the measurement is
a)
351%
b)
1%
c)
0.28%
d)
0.035%
Answer
Key:
d)
0.035%
5.
Which of the following has the highest number of significant figures?
a)
0.007 m2
b)
2.64x1024 kg
c)
0.0006032 m2
d)
6.3200 J
Answer
Key:
d)
6.3200 J
6.
If π = 3.14, then the value of π2 is
a)
9.8596
b)
9.860
c)
9.86
d)
9.9
Answer
Key:
c)
9.86
7.
Round of the following number 19.95 into three significant figures.
a)
19.9
b)
20.0
c)
20.1
d)
19.5
Answer
Key:
b)
20.0
8.
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
Answer
Key:
b)
torque and energy
9.
The dimensional formula of Planck's constant h is [JEE Main, NEET]
a)
[ML2T-1]
b)
[ML2T-3]
c)
[MLT-1]
d)
[ML3T-3]
Answer
Key:
a)
[ML2T-1]
10.
The velocity of a particle v at an instant t is given by v = at + bt2.
The dimensions of b is
a)
[L]
b)
[LT-1]
c)
[LT-2]
d)
[LT-3]
Answer
Key:
d)
[LT-3]
11.
The dimensional formula for gravitational constant G is
a)
[ML3T-2]
b)
[M-1L3T-2]
c)
[M-1L-3T-2]
d)
[ML-3T2]
Answer
Key:
b)
[M-1L3T-2]
12.
The density of a material in CGS system of units is 4 gcm-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
Answer
Key:
c)
40
13.
If the force is proportional to square of velocity, then the dimension of
proportionality
constant is [JEE- 2000]
a)
[MLT0]
b)
[MLT-1]
c)
[ML-2T]
d)
[ML-1T0]
Answer
Key:
d)
[ML-1T0]
14.
The dimension of is [Main AIPMT 2011]
(a)
length
(b)
time
(c)
velocity
(d)
force
Answer
Key:
(c)
velocity
15.
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?
[NEET
2016 (phase II)]
(a)
(b)
(c)
(d)
Answer
Key:
(a)
II. Short Answer Questions
11th physicsIII. Long Answer Questions
11th PhysicsIV. Exercise
11th Physics
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