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Physics

Physics
Minimum number of unequal vectors which can give zero resultant are

more than four
two
four
three

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Physics
Moving electric charge produces :

Sound waves
Light rays
Magnetic field
Heat waves

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Physics
A wire carrying current is

Neutral
Negatively charged
Charged with a type depending upon current strength
Positively charged

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Physics
The mercury and sodium street lamps light up because of :

Electron emission
Atomic absorption
Electron absorption
Atomic emission

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Physics
Find the power of a convex lens if the image formed is at a distance of 25 cm from the lens when the object is placed on the other side of the lens at 12 cm from the optical centre?

12.33 diopters
-12.33 diopters
4.33 diopters
-4.33 diopters

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Physics
Which of the following is an example of simple harmonic motion?

Motion of a ceiling fan
Earth spinning on its axis
Simple pendulum motion
Ball bouncing on floor

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