Answer:
New force,
Explanation:
The electrostatic force between two spheres is given by :
According to given condition, each of the spheres has lost half its initial charge, new force is given by :
So, the new force becomes (1/4)th of the initial force. Hence, the correct option is (d).
Answer:
Frequency doubles.
Explanation:
Frequency doubles because Wavelength and Frequency are inversely proportional. That means if one decreases the other one increases. So, if wavelength is half, frequency is the opposite, doubles.
momm=massxvelocity
momm=1200x2.5=120x25=600x5=3000kgm/s
Answer:
= 3.36 mm
Explanation:
From Ohm's law,
(Voltage = Current * Resistance)
The geometric definition of resistance is
where is the resistivity of the material, and are the length and cross-sectional area, respectively.
Since the wire is assumed to have a circular cross-section, its area is given by
where is the diameter.
Resistivity of copper = . With these and other given values,
Answer:
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