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Q: For waves, why is ?
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Match the following (multiple matches are possible) in the context of rolling motion:
Column I | Column II |
(A) Angular Momentum = (B) Kinetic Energy = (C) Kinetic Energy = (D) v_{cm}=Rω |
(p) Pure rolling (q) Rolling (r) Pure rotation about the point of contact |
Note: Do not leave any blank space and type in alphabetical order. Type alphabets without ( or ) symbols.
Angular momentum and kinetic energy results are valid for all types of rolling motions. However, v_{CM}=Rω is valid only for pure rolling motion but not for any other rolling motion. Pure rolling motion can be visualised as instantaneous rotational motion about the point of contact in which case kinetic energy can also be given by .
Angular momentum and kinetic energy results are valid for all types of rolling motions. However, v_{CM}=Rω is valid only for pure rolling motion but not for any other rolling motion. Pure rolling motion can be visualised as instantaneous rotational motion about the point of contact in which case kinetic energy can also be given by .
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(More than one option may be correct)
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A point charge q is placed in front of a conducting solid cube of edge a at a distance d from its centre (d > a/2). What is the magnitude of electric field at the centre of the cube due to the charges appearing on its surface?
A)
B)
C) 0
D)
E) None of the options given
Net electric field inside a conductor is zero.
Hence, field due to q should get cancelled by the field due to the induced charges.
Field due to q =
Field due to the induced charges should be equal to the above in magnitude but opposite in direction.
Net electric field inside a conductor is zero.
Hence, field due to q should get cancelled by the field due to the induced charges.
Field due to q =
Field due to the induced charges should be equal to the above in magnitude but opposite in direction.
Net electric field inside a conductor is zero.
A mass of 10 kg is at a point A on the table. It is moved to a point B. If the line joining A and B is horizontal, what is the work done on the object by the gravitational force? Explain your answer.
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