Units and Measurements Test

Result

Units and Measurements Test - 48

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
4 / -1

The percentage errors in the measurement of mass and speed are 2% and 3% respectively. How much will be the maximum error in the estimation of the kinetic energy obtained by measuring mass and speed?

A
11%

B
8%

C
5%

D
1%

Solution
Question 2
4 / -1

The random error in the arithmetic mean of loo observations is x; then random error in the arithmetic mean of 400 observations would be

A
4x

B
1/4 x

C
2x

D
1/2 x
Question 3
4 / -1

In an experiment the angles are required to be measured using an instrument. 29 divisions of the main scale exactly coincide with the 30 divisions of the vernier scale. lithe smallest division of the main scale is half-a-degree (= 0.5°) then the least count of the instrument is

A
One minute

B
Half minute

C
One degree

D
Half degree

Solution
Question 4
4 / -1

A body travels uniformly a distance of (13.8 ± 0.2) m in a time (4.0 ± 0.3) s. The velocity of the body within error limits is

A
(3.45 ± 0.2) ms^–1

B
(3.45 ± 0.3) ms^–1

C
(3.45 ± 0.4) ms^–1

D
(3.45 ± 0.5) ms^–1

Solution
Question 5
4 / -1

In a vernier calipers, one main scale division is x cm and n division of the vernier scale coincide with (n – 1) divisions of the main scale. The least count (in cm) of the callipers is

A

B

C

D

Solution
Question 6
4 / -1

In the context of accuracy of measurement and significant figures in expressing results of experiment, which of the following is/are correct?
(1) Out of the two measurements 50.14 cm and 0.00025 ampere, the first one has greater accuracy
(2) If one travels 478 km by rail and 397 m by road, the total distance traveled is 478 km.

A
Only (1) is correct

B
Only (2) is correct

C
Both are correct

D
None of them is correct
Question 7
4 / -1

The relative density of material of a body is found by weighing it first in air and then in water. If the weight in air is (5.00 ± 0.05) newton and weight in water is (4.00 ± 0.05) newton. Then the relative density along with the maximum permissible percentage error is

A
5.0 ± 11%

B
5.0 ± 1%

C
5.0 ± 6%

D
1.25 ± 5%

Solution
Question 8
4 / -1

The length of a cylinder is measured with a meter rod having least count 0.1 cm. Its diameter is measured with vernier callipers having least count 0.01 cm. Given that length is 5.0 cm, and radius is 2.0 cm. The percentage error in the calculated value of the volume will be

A
1%

B
2%

C
3%

D
4%

Solution
Question 9
4 / -1

A
7.96%

B
4.56%

C
6.50%

D
8.42%

Solution
Question 10
4 / -1

According to Joule’s law of heating, heat produced H = I² Rt, where I is current, R is resistance and t is time. If the errors in the measurement of I, R and t are 3%, 4% and 6% respectively then error in the measurement of H is

A
± 17%

B
± 16%

C
± 19%

D
± 25%

Solution