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Nishka Khatri   from Sanskriti School, New Delhi
Subject :Physics    Class : Class 7

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Sivaanshi   from Satya prakash, Jabalpur
Subject :Physics    Class : Class 7

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Aniruddh Ssingh   from Primea Academy Hyderabad, Hyderabad
Subject :Physics    Class : Class 6

A body is said to be in motion when its position changes continuously with respect to a stationary object taken as reference point. A body has a uniform motion if it travels equal distance in equal intervals of time, no matter how small these time intervals may be. The distance-time graph for uniform motion is a straight line. A body has a non-uniform motion if it travels unequal distance in equal intervals of time. The distance-time graph for a body having non-uniform motion is a curved line.
The distance-time graph for a uniform motion is

A
B
C
D


IT IS A BUG!

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Shauryansh   from Sanskriti, Pune
Subject :Physics    Class : Class 6

Fuse is a simple device for protecting electric circuits from overloads and short-circuits. A fuse consists of one or several fuse links, an insulating body and terminals for connecting the fuse to an electric circuit. Some fuses are filled with quartz sand to provide better cooling of the fuse link. Fuses are connected in series in an electric circuit and break the circuit when the fuse links melt.
Among these the main characteristics of fuse link is

A Low melting point
B High conductivity
C None of these
D Both A and B


If fuse has high conductivity how des it destroy a circuit

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Shauryansh   from Sanskriti, Pune
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 : Repulsion, not attraction is the surest test of magnetism.
Reason : Like poles of magnets repel each other.

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.


The correct answer (B) ,I chose A, says Assertion is correct . Without another magnet , how it’s possible to prove that the particular piece of iron is a magnet???

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Aanya   from R. N Podar , Mumbai
Subject :Physics    Class : Class 6

A magnetic field is described by drawing the magnetic field lines. The magnetic field lines always begin from the north pole of magnet and end on the south pole of the magnet. They do not intersect one another. They come closer to one another near the poles but they are widely separated at other places.
The direction of magnetic field lines is

A north to south
B south to north
C both (A) and (B)
D neither (A) nor (B)


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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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