Question # 1

Which of the following is a scalar quantity

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Density

Displacement

Torque

Weight

A (100 W, 200 V) bulb is connected to a 160 V power supply. The power consumption would be

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64 W

80 W

100 W

125 W

Which of the following is equal to:

joule x ohm / volt x second ?

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Ampere

Volt

Watt

Tesla

The nucleus 6C12 absorbs an energetic neutron and emits a beta particle (β) The resulting nucleus is

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₇N¹⁴

₅B¹³

₇N¹³

₆N¹³

The excess (equal in number) of electrons that must be placed on each of two small spheres spaced 3 cm apart. with force of repulsion between the spheres to be 10^-19 N is

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25

225

625

1250

The dot product of two vectors is negative when

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They are parallel vectors

They are anti-parallel vectors

They are perpendicular vectors

None of the above is correct

A train of 150 m length is going towards north direction at a speed of 10 ms^-1 A parrot flies at a speed of 5 ms^-1 towards south direction parallel to the railway track,The time taken by the parrot to cross the train is equal to

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12 s

8 s

15 s

10 s

Blood has a density

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Equal to water

Greater then water

Lesser then water

None of these

Quantity that remains unchanged in a transformer is

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Voltage

Current

Frequency

None of these

A wire is stretched to double of its length.The strain is

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2

1

Zero

0.5

The fundamental unit which has same power in the dimensional formula of surface tension and viscosity is:

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Mass

Length

Time

None

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