Physics
Match the following:
Energy | $$ ML^{-1}T^{-2} $$ |
Torque | $$ ML^2T^{-2} $$ |
Planks Constant | $$ ML^2T^{-1} $$ |
Angular Momentum | $$ MLT^{-1} $$ |
Matrix
Medium
Published on 18th 08, 2020
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Q1
Subjective
Medium
The flux of magnetic field through a closed conducting loop changes with time according to the equation,$$ \Phi ={ at }^{ 2 }+bt+c$$.$$(a)$$ Write the $$SI$$ units of $$a,b$$ and $$c$$ $$(b)$$ If the magnitudes of $$a,b$$ and $$c$$ are $$0\cdot 20, 0.40$$ and $$0.60$$ respectively, find the including emf at $$t=2\ s$$.
Asked in: Physics - Units and Measurement
1 Verified Answer | Published on 18th 08, 2020
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Q2
Single Correct
Medium
The least count of a stop watch is 0.2 second.The time of 20 oscillations of a pendulum is measured to be 25 seconds.The percentage error in time period is
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- B. 0.8%
- C. 1.8%
- D. 8%
Asked in: Physics - Units and Measurement
1 Verified Answer | Published on 18th 08, 2020
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Q3
Single Correct
Medium
While measuring the length of a wooden box, the reading at one end is 1.5 cm and the other end is 4.7 cm. What is the length of the wooden box?
- A. 4.7 cm
- B. 1.5 cm
- C. 3.2 cm
- D. 6.2 cm
Asked in: Physics - Units and Measurement
1 Verified Answer | Published on 18th 08, 2020
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Q4
Multiple Correct
Medium
Choose the correct statement(s)
- A. A dimensionally correct equation must be correct
- B. A dimensionally correct equation may be correct`
- C. A dimensionally incorrect equation must be incorrect
- D. A dimensionally incorrect equation may be correct.
Asked in: Physics - Units and Measurement
1 Verified Answer | Published on 18th 08, 2020
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Q5
Single Correct
Medium
In system called the star system we have $$1$$ star kilogram $$=10^{20}kg$$. $$1$$ starmeter $$=10^{8}m$$, $$1$$ starsecond $$=10^3second$$ then calculate the value of $$1\,joule$$ in this system.
- A. $$10^{-30}star\,joule$$
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- C. $$10^{-32}star\,joule$$
- D. None of these
Asked in: Physics - Units and Measurement
1 Verified Answer | Published on 18th 08, 2020
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