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Gnom [1K]
3 years ago
5

Describe how a change in resistance would affect the current in a circuit.

Physics
1 answer:
Tresset [83]3 years ago
3 0

Explanation:

The relation between potential difference, current and resistance flowing in a circuit is given by using Ohm's law. It can be given by :

V = IR

I=\dfrac{V}{R}

Resistance opposes the flow of electric current in the circuit. It means that, if resistance is more, less current will flow through the circuit.

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In the formula used to solve problems related to the first law of thermodynamics what does Q represent?
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3 years ago
It requires a force of 100 N to stretch a spring of negligible mass by a distance of 0.1 m. If the spring instead stretches a di
Mariana [72]

by the formula of spring force we know that

F = kx

here we know that

F = 100 N

x = 0.1 m

now we will have

100 = k \times 0.1

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now by similar way if the stretch in spring is 0.25 m

force is given by

F = kx

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5 0
3 years ago
Read 2 more answers
A wheel rotates about a fixed axis with an initial angular velocity of 20 rad/s. During a 5.0-s interval, the angular velocity d
Nikitich [7]

Answer:

The angular displacement of the wheel is 45 radians

Explanation:

Given;

initial angular velocity, ω₀ = 20 rad/s

final angular velocity, ωf = 10 rad/s

time interval, t = 5

Angular acceleration is calculated as;

\alpha = \frac{\omega _f - \omega_0}{t} \\\\\alpha = \frac{10 -20}{5} \\\\\alpha = -2 \ rad/s^2

|α| = 2 rad/s²

Angular displacement is calculated as;

\theta = \omega_0 \  + \ \frac{1}{2} \alpha t^2\\\\\theta = 20 \ + \ \frac{1}{2} *(2)*5^2\\\\\theta = 20 \ + 25\\\\ \theta = 45 \ radians

Therefore, the angular displacement of the wheel is 45 radians

8 0
3 years ago
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