Units and Measurements Test

Result

Units and Measurements Test - 31

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Weekly Quiz Competition

Question 1
4 / -1

A thin copper wire of length l metre increases in length by 2% when heated through 10°C. What is the percentage increase in area when a square copper sheet of length l metre is heated through 10°C ?

A
4%

B
8%

C
16%

D
None of these
Question 2
4 / -1

A
5%

B
7%

C
5.2%

D
5/2%

Solution
Question 3
4 / -1

The period of oscillation of a simple pendulum in the experiment is recorded as 2.63 s, 2.56 s, 2.42 s, 2.71 s and 2.80 s respectively. The average absolute error is

A
0.1 s

B
0.11 s

C
0.01 s

D
1.0 s

Solution
Question 4
4 / -1

If L = 2.331 cm, B = 2.1 cm, then L + B =

A
4.431 cm

B
4.43 cm

C
4.4 cm

D
4 cm
Question 5
4 / -1

The number of significant figures in all the given numbers 25.12,2009, 4.156 and 1.217 × 10^–4 is

A
1

B
2

C
3

D
4
Question 6
4 / -1

If the acceleration due to gravity is 10 ms^–2 and the units of length and time are changed in kilometer and hour respectively, the numerical value of the acceleration is

A
3,60,000

B
72,000

C
36,000

D
1,29,600

Solution
Question 7
4 / -1

Select the pair whose dimensions are same

A
Pressure and stress

B
Stress and strain

C
Pressure and force

D
Power and force

Solution
Question 8
4 / -1

A
Velocity

B
Momentum

C
Energy

D
Angular momentum
Question 9
4 / -1

The dimensions of calorie are

A
ML²T^–2

B
MLT^–2

C
ML²T^–1

D
ML²T^–3
Question 10
4 / -1

If C and R represent capacitance and resistance respectively, then the dimensions of RC are

A
M⁰L⁰T²

B
M⁰L⁰T

C
ML^–1

D
None of these

Solution