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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Find the maximum velocity for the overturn of a car moving on a circular track of radius 100 m. The co-efficient of friction between the road and tyre is 0.2

A) 0.14 m/s
B) 140 m/s
C) 1.4 km/s
D) 14 m/s

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Sound waves in air are

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

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Nuclear sizes are expressed in a unit named.

A) Fermi
B) angstrom
C) newton
D) tesla

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out of the following, which is not emitted by radioactive substance?

A) Electrons
B) Electromagnetic radiations
C) Alpha particles
D) Neutrons

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