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1 answer:
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Answer:
16
Explanation:
The magnitude of the electrostatic force between two charged particles is given by
where
k is the Coulomb's constant
q1, q2 are the charges of the two particles
r is the separation between the particles
In this problem, the initial force between the particles is F.
Later, the distance between the two particles is increased by four, so
r' = 4r
So, the new force between the particles will be
So, the new force decreases by a factor of 16.
Answer:
No the resistance of a given circuit does not remain constant if the temperature of the circuit changes.
Explanation:
The resistance of any resistor used in a circuit depends upon the temperature of that resistor. This can be mathematically represented as follows
Where,
R(t) is resistance of any resistor at temperature t
is the resistance of the resistor at time of fabrication
α is temperature coefficient of resistivity it's value is different for different materials
This change in the resistance is the cumulative effect of:
1) Variation of resistivity with temperature
2) Change in dimensions of the resistor with change in temperature