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3 years ago

There is said to be a short circuit when

1 answer:

6 0

A short circuit is said to have occurred when two nodes of a circuit at different voltages are abnormally connected

There is said to be a short circuit when; One part of a parallel circuit has a very low resistance and almost all the current will flow through this part and very little current will flow through the other part

The correct option is option B.

Reason:

A circuit has to be closed or the the current path has to be closed for

current to flow. A short circuit occurs when current in a circuit flows

through an abnormal path, such as a bridge in a connection to a load that

creates a parallel path for current flow.

Almost all the current flows through the parallel path due to the low

resistance in the connection (almost zero) and the proximity to the power

source, thereby preventing current from reaching its intended destination

Therefore, the correct option is option B.;

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A wave with a speed of 437 m/s has a frequency of 28 hertz. What is the length of the wave?

Natasha2012 [34]

Answer: 15.6 metres

Explanation:

Given that:

length of wave (λ)= ?

Frequency of wave F = 28 Hertz

Speed of wave (V) = 437 m/s

The wavelength is the distance covered by the wave in one complete cycle. It is measured in metres, and represented by the symbol λ.

So, apply V = F λ

Make λ the subject formula

λ = V / F

λ = 437 m/s / 28 Hertz

λ = 15.6 m

Thus, the length of the wave is 15.6 metres

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4 years ago

What is the magnitude of the force a 25 charge exerts on a 3 mc charge 35cm away?

lara31 [8.8K]

The electrostatic force between two charges is given by
$F=k_e \frac{q_1 q_2}{r^2}$
where
ke is the Coulomb's constant
q1 and q2 are the two charges
r is the separation between the charges

In our problem,
$q_1 = 25 \mu C=25 \cdot 10^{-6} C$
$q_2 = 3 mC = 3 \cdot 10^{-3} C$
$r=35 cm=0.35 m$
Therefore the electrostatic force is
$F=(8.99 \cdot 10^9 Nm^2C^{-2}) \frac{(25 \cdot 10^{-6}C)(3 \cdot 10^{-3}C)}{(0.35 m)^2}= 5510 N$

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4 years ago

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