Light year is a unit of

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

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Magnetism at the centre of a bar magnet is

A) minimum
B) maximum
C) zero
D) minimum or maximum

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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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Sound waves in air are

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

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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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