QBManager

PHXI02:UNITS AND MEASUREMENTS

367451 The reliability of a measurement depends on

1 Precision

2 Accuracy

3 Systematic error

4 Random error

PHXI02:UNITS AND MEASUREMENTS

367452 The true length of a wire is $3.678 c m$ . When the length of this wire is measured using instrument $A$ , the length of the wire is $3.5 c m$ . When the length of the wire is measured using instrument $B$ , it is found to have length $3.38 c m$ . Then the

1 measurement with

B

is more accurate and precise.

2 measurement with

A

is more precise while measurement with

B

is more accurate.

3 measurement with

A

is more accurate and precise.

4 measurement with

A

is more accurate while measurement with

B

is more precise.

Explanation:

True length $= 3.678 c m$ .
The value 3.5 is closer to 3.678 than the value $3.38 \Rightarrow A$ is more accurate. However, the value 3.38 has two decimal places.
$\Rightarrow B$ is more precise.
Correct option is (4).

KCET - 2023

PHXI02:UNITS AND MEASUREMENTS

367453 To reduce the least count error, instruments need higher

1 Precision

2 Accuracy

3 Mean value

4 True value

PHXI02:UNITS AND MEASUREMENTS

367454 The mass of a block is 26 $m g$ . A student measures the volume and finds it be 25.1 $m g$ , 25.2 $m g$ , and 25.3 $m g$ in the first, second, third, and fourth trial, respectively. Which of the following statements is true for his measurements?

1 They are neither precise nor accurate.

2 They have good accuracy.

3 They have good precision.

4 They have poor precision.

PHXI02:UNITS AND MEASUREMENTS

367455 The volume of a liquid is 20.5 $m L$ , which of the following sets of measurement represents the value with good accuracy?

1

18.6 m L, 17.8 m L, 19.6 m L, 17.2 m L

2

19.2 m L, 19.3 m L, 18.8 m L, 18.6 m L

3

18.9 m L, 19.0 m L, 19.2 m L, 18.8 m L

4

20.2 m L, 20.5 m L, 20.3 m L, 20.1 m L

Explanation:

The set $20.2 m L, 20.5 m L, 20.3 m L, 20.1 m L$ represents the value with good accuracy.

PHXI02:UNITS AND MEASUREMENTS

367451 The reliability of a measurement depends on

1 Precision

2 Accuracy

3 Systematic error

4 Random error

PHXI02:UNITS AND MEASUREMENTS

367452 The true length of a wire is $3.678 c m$ . When the length of this wire is measured using instrument $A$ , the length of the wire is $3.5 c m$ . When the length of the wire is measured using instrument $B$ , it is found to have length $3.38 c m$ . Then the

1 measurement with

B

is more accurate and precise.

2 measurement with

A

is more precise while measurement with

B

is more accurate.

3 measurement with

A

is more accurate and precise.

4 measurement with

A

is more accurate while measurement with

B

is more precise.

Explanation:

True length $= 3.678 c m$ .
The value 3.5 is closer to 3.678 than the value $3.38 \Rightarrow A$ is more accurate. However, the value 3.38 has two decimal places.
$\Rightarrow B$ is more precise.
Correct option is (4).

KCET - 2023

PHXI02:UNITS AND MEASUREMENTS

367453 To reduce the least count error, instruments need higher

1 Precision

2 Accuracy

3 Mean value

4 True value

PHXI02:UNITS AND MEASUREMENTS

367454 The mass of a block is 26 $m g$ . A student measures the volume and finds it be 25.1 $m g$ , 25.2 $m g$ , and 25.3 $m g$ in the first, second, third, and fourth trial, respectively. Which of the following statements is true for his measurements?

1 They are neither precise nor accurate.

2 They have good accuracy.

3 They have good precision.

4 They have poor precision.

PHXI02:UNITS AND MEASUREMENTS

367455 The volume of a liquid is 20.5 $m L$ , which of the following sets of measurement represents the value with good accuracy?

1

18.6 m L, 17.8 m L, 19.6 m L, 17.2 m L

2

19.2 m L, 19.3 m L, 18.8 m L, 18.6 m L

3

18.9 m L, 19.0 m L, 19.2 m L, 18.8 m L

4

20.2 m L, 20.5 m L, 20.3 m L, 20.1 m L

Explanation:

The set $20.2 m L, 20.5 m L, 20.3 m L, 20.1 m L$ represents the value with good accuracy.

PHXI02:UNITS AND MEASUREMENTS

367451 The reliability of a measurement depends on

1 Precision

2 Accuracy

3 Systematic error

4 Random error

PHXI02:UNITS AND MEASUREMENTS

367452 The true length of a wire is $3.678 c m$ . When the length of this wire is measured using instrument $A$ , the length of the wire is $3.5 c m$ . When the length of the wire is measured using instrument $B$ , it is found to have length $3.38 c m$ . Then the

1 measurement with

B

is more accurate and precise.

2 measurement with

A

is more precise while measurement with

B

is more accurate.

3 measurement with

A

is more accurate and precise.

4 measurement with

A

is more accurate while measurement with

B

is more precise.

Explanation:

True length $= 3.678 c m$ .
The value 3.5 is closer to 3.678 than the value $3.38 \Rightarrow A$ is more accurate. However, the value 3.38 has two decimal places.
$\Rightarrow B$ is more precise.
Correct option is (4).

KCET - 2023

PHXI02:UNITS AND MEASUREMENTS

367453 To reduce the least count error, instruments need higher

1 Precision

2 Accuracy

3 Mean value

4 True value

PHXI02:UNITS AND MEASUREMENTS

367454 The mass of a block is 26 $m g$ . A student measures the volume and finds it be 25.1 $m g$ , 25.2 $m g$ , and 25.3 $m g$ in the first, second, third, and fourth trial, respectively. Which of the following statements is true for his measurements?

1 They are neither precise nor accurate.

2 They have good accuracy.

3 They have good precision.

4 They have poor precision.

PHXI02:UNITS AND MEASUREMENTS

367455 The volume of a liquid is 20.5 $m L$ , which of the following sets of measurement represents the value with good accuracy?

1

18.6 m L, 17.8 m L, 19.6 m L, 17.2 m L

2

19.2 m L, 19.3 m L, 18.8 m L, 18.6 m L

3

18.9 m L, 19.0 m L, 19.2 m L, 18.8 m L

4

20.2 m L, 20.5 m L, 20.3 m L, 20.1 m L

Explanation:

The set $20.2 m L, 20.5 m L, 20.3 m L, 20.1 m L$ represents the value with good accuracy.

PHXI02:UNITS AND MEASUREMENTS

367451 The reliability of a measurement depends on

1 Precision

2 Accuracy

3 Systematic error

4 Random error

PHXI02:UNITS AND MEASUREMENTS

367452 The true length of a wire is $3.678 c m$ . When the length of this wire is measured using instrument $A$ , the length of the wire is $3.5 c m$ . When the length of the wire is measured using instrument $B$ , it is found to have length $3.38 c m$ . Then the

1 measurement with

B

is more accurate and precise.

2 measurement with

A

is more precise while measurement with

B

is more accurate.

3 measurement with

A

is more accurate and precise.

4 measurement with

A

is more accurate while measurement with

B

is more precise.

Explanation:

True length $= 3.678 c m$ .
The value 3.5 is closer to 3.678 than the value $3.38 \Rightarrow A$ is more accurate. However, the value 3.38 has two decimal places.
$\Rightarrow B$ is more precise.
Correct option is (4).

KCET - 2023

PHXI02:UNITS AND MEASUREMENTS

367453 To reduce the least count error, instruments need higher

1 Precision

2 Accuracy

3 Mean value

4 True value

PHXI02:UNITS AND MEASUREMENTS

367454 The mass of a block is 26 $m g$ . A student measures the volume and finds it be 25.1 $m g$ , 25.2 $m g$ , and 25.3 $m g$ in the first, second, third, and fourth trial, respectively. Which of the following statements is true for his measurements?

1 They are neither precise nor accurate.

2 They have good accuracy.

3 They have good precision.

4 They have poor precision.

PHXI02:UNITS AND MEASUREMENTS

367455 The volume of a liquid is 20.5 $m L$ , which of the following sets of measurement represents the value with good accuracy?

1

18.6 m L, 17.8 m L, 19.6 m L, 17.2 m L

2

19.2 m L, 19.3 m L, 18.8 m L, 18.6 m L

3

18.9 m L, 19.0 m L, 19.2 m L, 18.8 m L

4

20.2 m L, 20.5 m L, 20.3 m L, 20.1 m L

Explanation:

The set $20.2 m L, 20.5 m L, 20.3 m L, 20.1 m L$ represents the value with good accuracy.

PHXI02:UNITS AND MEASUREMENTS

367451 The reliability of a measurement depends on

1 Precision

2 Accuracy

3 Systematic error

4 Random error

PHXI02:UNITS AND MEASUREMENTS

367452 The true length of a wire is $3.678 c m$ . When the length of this wire is measured using instrument $A$ , the length of the wire is $3.5 c m$ . When the length of the wire is measured using instrument $B$ , it is found to have length $3.38 c m$ . Then the

1 measurement with

B

is more accurate and precise.

2 measurement with

A

is more precise while measurement with

B

is more accurate.

3 measurement with

A

is more accurate and precise.

4 measurement with

A

is more accurate while measurement with

B

is more precise.

Explanation:

True length $= 3.678 c m$ .
The value 3.5 is closer to 3.678 than the value $3.38 \Rightarrow A$ is more accurate. However, the value 3.38 has two decimal places.
$\Rightarrow B$ is more precise.
Correct option is (4).

KCET - 2023

PHXI02:UNITS AND MEASUREMENTS

367453 To reduce the least count error, instruments need higher

1 Precision

2 Accuracy

3 Mean value

4 True value

PHXI02:UNITS AND MEASUREMENTS

367454 The mass of a block is 26 $m g$ . A student measures the volume and finds it be 25.1 $m g$ , 25.2 $m g$ , and 25.3 $m g$ in the first, second, third, and fourth trial, respectively. Which of the following statements is true for his measurements?

1 They are neither precise nor accurate.

2 They have good accuracy.

3 They have good precision.

4 They have poor precision.

PHXI02:UNITS AND MEASUREMENTS

367455 The volume of a liquid is 20.5 $m L$ , which of the following sets of measurement represents the value with good accuracy?

1

18.6 m L, 17.8 m L, 19.6 m L, 17.2 m L

2

19.2 m L, 19.3 m L, 18.8 m L, 18.6 m L

3

18.9 m L, 19.0 m L, 19.2 m L, 18.8 m L

4

20.2 m L, 20.5 m L, 20.3 m L, 20.1 m L

Explanation:

The set $20.2 m L, 20.5 m L, 20.3 m L, 20.1 m L$ represents the value with good accuracy.