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Subject :NSO    Class : Class 5

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Subject :NSO    Class : Class 7

Four identical bulbs are connected to a circuit as shown in the given figure. Due to fluctuations in the voltage, the bulb B3 blows off.

(A voltmeter measures voltage and it allows almost no current to pass through it.) Now consider the following statements.
I. Reading of the voltmeter V1, after the blowing off is 20 V.
II. Reading of the voltmeter V2, after the blowing off is zero.
III. Reading of voltmeter V1, before the blowing off is 4 V.
IV. Reading of voltmeter V2, before the blowing off is 5 V.
The incorrect statements are

AII and III only
BI, II and III only
CII, III and IV only
DI and III only.


Ans 1:

Class : Class 7
Voltage after blow off is zero

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 5

Ans 2:

Class : Class 5

Ans 3:

Class : Class 5

Ans 4:

Class : Class 4
The answer is C

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Subject :NSO    Class : Class 7

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Subject :NSO    Class : Class 5

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Subject :NSO    Class : Class 6

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Subject :NSO    Class : Class 4

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Subject :NSO    Class : Class 6

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Subject :NSO    Class : Class 8

Refer to the given figures and select the incorrect statement regarding them.


AZ is an organ that receives the sperm which fertilises ovum in X.
BSecretions of both Q and Y help in development of male and female gametes, respectively.
CBoth P and W secrete hormones that control development of secondary sexual characters in males and females, respectively.
DR is an erectile organ that releases its contents into Z which also serves as birth canal during parturition.


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Subject :NSO    Class : Class 5

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