Question # 1

Two uncharged objects A and B are rubbed against each other. When object B is placed near a negatively charged object C, the two objects repel each other. Which of these statements is true about object A.

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Remains uncharged

Becomes positively charged

Becomes negatively charged

Unpredicatable

The speed of sound in air at 0 ^oC is:

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331 ms^-1

332 ms^-1

333 ms^-1

336 ms^-1

To hear echoes, the minimum distance of the obstacle from source of sound should be:

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10 m

15 m

17 m

20 m

The index of refraction depends on:

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The focal length

The speed of light

the image distance

The object distance

An example of input device computer is:

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Keyboard

printer

monitor

RAM

The angle of which prism deviates the incident ray is called:

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angle of incident

angle of reflection

angle of deviation

angle of minimum deviation

The instrument which is used to display the magnitude of changing electric current is called:

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Evacuated tube

Cathode rays oscilloscope

Television tube

Picture tube

The distance of the object from the mirror is represented by :

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q

p

m

F

According to Fleming's left hand rule the direction of force on the conductor is given by:

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Thumb

Fore finger

Middle finger

None of these

The standard group of bits in digital electronic is:

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5 bits

6 bits

7 bits

8 bits

The maximum displacement from mean position is called:

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Maximum height

Time period

Amplitude

Interval

SI unit of capacitance is:

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Joule

Volt

Watt

Farad

The half of carbon 14 is

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5720 years

5730 years

5740 years

5750 years

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