Sound waves in air are

A) transverse
B) longitudinal
C) electromagnetic
D) polarised

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Light year is a unit of

A) time
B) distance
C) light
D) intensity of light

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Rectifiers are used to convert

A) Direct current to Alternating current
B) Alternating current to Direct current
C) high voltage to low voltage
D) low voltage to high voltage

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Out of the following pairs, choose the pair in which the physical quantities do not have identical dimension?

A) Pressure and Young modules
B) Planck constant and Angular momentum
C) Impulse and moment of force
D) Force and rate of change of linear momentum

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Let a thin capillary tube be replaced with another tube of insufficient length then, we find water

A) will overflow
B) will not rise
C) depressed
D) change its meniscus

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