Physics Test 69

Result

Physics Test 69

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Weekly Quiz Competition

Question 1
4 / -1

Which physical quantities have same dimensions :-

A
Force and power

B
Torque and energy

C
Torque and power

D
Force and Torque
Question 2
4 / -1

Given : Potential difference, V = (8 ± 0.5)V and current, I = (2 ± 0.2)A. The value of resistance R in Ω is :-

A
4 ± 16.25%

B
4 ± 6.25%

C
4 ± 10%

D
4 ± 8%

Solution

We know that R = V/I = 8/2 = 4 Ω. Percentage error in V is 0.5/8 × 100 = 6.25.

Percentage error in I is 0.2/2 × 100 = 10. Now, add up the percentage errors and get the answer.
Question 3
4 / -1

Round off 16.2689 to 4 digits

A
16.27

B
16.28

C
16.26

D
16.29

Solution

16.27

If the digit to be rounded off is more than 5, then the preceding digit is increased by one. e.g. 6.87 ≈ 6.9
Question 4
4 / -1

Measure of two quantities along with the precision of respective measuring instrument is :-

A = 2.5 m/s ± 0.5 m/s

B = 0.10s ± 0.01 s

The value of AB will be :-

A
(0.25 ± 0.08)m

B
(0.25 ± 0.5) m

C
(0.25 ± 0.05) m

D
(0.25 ± 0.135) m

Solution
Question 5
4 / -1

For ellipse x²/16 + y²/9 = 1 the co-ordinates of points A and B are respectively:-

A
(0, 3) and (4, 0)

B
(3, 0) and (0, 4)

C
(4, 0) and (0, 3)

D
(16, 0) and (0, 9)

Solution
Question 6
4 / -1

The value of

A

B

C

D
None of these

Solution
Question 7
4 / -1

The angle subtended by vector with the x-axis is :-

A
sin^-1 (3/13)

B
sin^-1 (4/13)

C
cos^-1 (4/13)

D
cos^-1 (3/13)

Solution
Question 8
4 / -1

A
1

B
- 3/2

C
- 1/2

D
0

Solution
Question 9
4 / -1

A

B

C

D
Question 10
4 / -1

The equation of wave is given by y = A sin ω [x/v - k] where ω is the angular velocity and v is the linear velocity. Write dimensional formula of k.

A
[M⁰L⁰T¹]

B
[M¹L⁰T^–1]

C
[M⁰L¹T¹]

D
M¹L^–1T¹

Solution