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Divita Saxena   from BVM Ashti, nagpur (Maharashtra)
Subject :Physics    Class : Class 8

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MOUNIKA MONDAL   from The Newtown School, Kolkata
Subject :Physics    Class : Class 6

In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:
Assertion : The beating of heart is repetitive.
Reason : The beating of heart is a type of periodic motion.

A If both assertion and reason are true and reason is the correct explanation of assertion.
B If both assertion and reason are true but reason is not the correct explanation of assertion.
C If assertion is true but reason is false.
D If assertion is false but reason is true.


why not the option A is true?

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Aryan Ghanshyam Deshmukh   from B K Birla Public School Kalyan, Kalyan
Subject :Physics    Class : Class 6

If the same motion occurs again and again, it is said to be repetitive motion. Repetitive motion that repeats itself at regular intervals of time is called periodic motion. A pendulum undergoes periodic motion. The time taken by a pendulum to complete its one oscillation is known as its time period. Frequency of a pendulum is defined as the number of oscillations completed in 1 second.
If the time taken by the pendulum from C to A is 4 s, then the time taken by it to complete its one oscillation is


A 8 s
B 12 s
C 16 s
D 4 s


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Shivyanshi   from Salwan Public School, Plot no. G-4, 16, Second Floor, Vatika India Next, Sector 82, Gurugram, Pin code: 122004
Subject :Physics    Class : Class 7

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Atheeq   from Vaels RBGS, chennai
Subject :Physics    Class : Class 6

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Atheeq   from Vaels RBGS, chennai
Subject :Physics    Class : Class 6

Ans 1:

Atheeq   from Vaels RBGS, chennai
Class : >Class 7
20

Ans 2:

Atheeq   from Vaels RBGS, chennai
Class : >Class 7
20

Ans 3:

Atheeq   from Vaels RBGS, chennai
Class : >Class 7

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Rudra Tara   from ,
Subject :Physics    Class : Class 8

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Sara deore   from st joseph, PUNE
Subject :Physics    Class : Class 7

In each of the following questions, a statement of Assertion (A) is given followed by a corresponding statement of Reason (R) just below it. Of the statements, mark the correct answer as
Assertion : Radiation is a process of transfer of heat in which a material medium is not necessary.
Reason : The heat from the sun reaches us through millions of miles of empty space by convection.

A If both assertion and reason are true and reason is the correct explanation of assertion
B If both assertion and reason are true but reason is not the correct explanation of assertion
C If assertion is true but reason is false
D If assertion is false but reason is true.

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Aryan   from ABN, Roorkee
Subject :Physics    Class : Class 7

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Aryan jain   from DPS Noida, Delhi
Subject :Physics    Class : Class 10

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