Question # 1

We can distinguish between the notes of a piano and flute due to ………… of sound.

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Loudness

Pitch

Quality

Intensity

The distance of spherical mirror is called:

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Curvature

Aperture

Sphere

a,b

The number of wavelength of waves passing through a point in one secnd is called:

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Time period

Cycle

Frequency

None of these

A positive electric charge:

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Attracts other positive charge

Repels other positive charge

Attracts a neutral charge

Repels a neutral chage

The speed of waves can be calculated by:

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Vt

d x t

f λ

Tf

Snell's law is stated as:

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Sin i / sin r = n1/n2

sin i / sin r = n2/n1

sin r / sin i = n2/n1

sin r / sin i = 2n2/n1

SI unit of electric potential is:

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watt

volt

coulomb

joule

Digital technology is used in:

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Bulb

Radar

Electric motor

All of these

The motion in which the friction reduces the mechanical energy of the system as times passes and the amplitude of motion reduces is called:

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SHM

Randum motion

Damped motion

None of these

Electric motor converts electrical energy into:

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Chemical energy

Solar energy

Heat energy

Mechanical energy

The distance of image from mirror is represented by:

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q

p

F

m

A current carrying conductor produces a field around it is called:

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Electric field

Magnetic field

Both a and b

None of these

The totally reflectiing prism one angle is of:

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45^o

90^o

180^o

120^o

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