i, ii and iii
i, ii and iv only
i and ii only
i and ii only
all four statements
Correct answer is B
No explanation has been provided for this answer.
conduction only
convection only
radiation only
non of these methods
Correct answer is C
No explanation has been provided for this answer.
An inclined plane of angle \(\theta\), acting as a simple machine, has a velocity ratio
sin\(\theta\)
\(\frac{1}{\text{sin}\theta}\)
cos\(\theta\)
\(\frac{1}{\text{cos}\theta}\)
sin\(\theta cos\theta\)
Correct answer is B
No explanation has been provided for this answer.
Which of the following elements are real magnetic materials?
Iron, steel and nickel
copper, steel and iron
lead, iron and brass
glass, lead and steel
stone, air and iron
Correct answer is A
No explanation has been provided for this answer.
Doppler effect
Resonance
Ultra sound
Diffraction of sound
Rarefaction
Correct answer is A
No explanation has been provided for this answer.