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Liula [17]
3 years ago
14

True or False? In an RL circuit, the larger the value of R (i.e. the resistance of the circuit), the longer it takes the circuit

to reach its final steady-state value (with all else being held constant). False True [1 point] Suppose we measure the energy stored in some inductor to be E when there is a current I running through it. If I double the current in the inductor, the new total energy will become _____. E E/4 8E E/2 2E 4E
Physics
1 answer:
Luba_88 [7]3 years ago
3 0

Answer:

1.False

2.4 E

Explanation:

1.We have to find the statement is true or false.

We know that

Time constant,\tau=\frac{L}{R}

Time constant is inversely proportional to resistance R .It means when R increases then time constant decreases when R decrease then the time  constant decreases.

Statement:The larger the value of R ,the longer it takes the circuit to reach its final steady- state value

It is false.

2.Energy stored in inductor,E=\frac{1}{2}LI^2

When I'=2I

Then, E'=\frac{1}{2}L(2I)^2=\frac{1}{2}LI^2\times 4=4 E

Hence,the new total energy will become 4 E.

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Answer:

-15 m/s

Explanation:

The computation of the velocity of the 4.0 kg fragment is shown below:

For this question, we use the correlation of the momentum along with horizontal x axis

Given that

Weight of stationary shell = 6 kg

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Angle = 60

Speed = 60 m/s

Based on the above information, the velocity = v is

1\times 60 \times cos\ 60 + 1\times 60 \times cos\ 60 - 4\ v = 0

\frac{60}{2} + \frac{60}{2} - 4\ v = 0

v = \frac{60}{4}

= -15 m/s

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Explanation:

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