- The value of a scalar.
- Component of a vector.
- A vector.
- The magnitude of a vector.
The value of a scalar.
A vector.
The magnitude of a vector.
Explanation:
The value of a scalar, a vector and the magnitude of a vector do not depend on a given set of coordinate axes with different orientation. However, components of a vector depend on the orientation of the axes.
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An electron and a proton enter region of uniform magnetic field in a direction at right angles to the field with the same kinetic energy. They describe circular paths of radius and
respectively. Then
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(a) |
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(b) |
|
(c) |
|
(d) |
An electron and a proton with equal momentum enter perpendicularly into a uniform magnetic field, then
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(a) The path of proton shall be more curved than that of electron |
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(b) The path of proton shall be less curved than that of electron |
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(c) Both are equally curved |
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(d) Path of both will be straight line |
In the figure, current through the 3 Ω resistor is 0.8 ampere, then potential drop through 4 Ω resistor is

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(a) 9.6 V |
(b) 2.6 V |
(c) 4.8 V |
(d) 1.2 V |