Explain why the lamp does not light when the input to the transformer is directed current

2 answers:

7 0

Direct current(DC) has no time varying field because current is constant as well as there is no relatively motion between coil and core(magnetic circuit) of the transformer. So there is no induced emf in secondary coil of the transformer.

lesya692 [45]3 years ago

3 0

Answer:

Explanation:

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Ymorist [56]

Answer:

The temperature-time diagram is attached below

When ethanol is heating -120°C, its temperature rises till -114°C. Then the temperature remains constants at -114°C° till all of the ethanol is converted from Solid to Liquid. After that the temperature starts to rise again till 78°C. Then the temperature remains constants till all the liquid is converted into gas.

The slopes depends on rate of heating and specific heat capacity of ethanol.

The plateaus depend on rate of heating and latent heat of fusion and latent heat of vaporization.

4 0

3 years ago

A spacecraft on its way to Mars has small rocket engines mounted on its hull; one on its left surface and one on its back surfac

lozanna [386]

Answer:

v=545.41 $\frac{m}{s}$

β=-25.93

Explanation:

Give the acceleration in 'x' and 'y' also the time can find the initial velocity using equation of uniform acceleration motion

For axis x

$a_{x}=5.10\frac{m}{s^{2}} \\v_{fx}=3780\frac{m}{s} \\v_{fx}=v_{ox}+a_{x}*t\\v_{ox}=v_{fx}-a_{x}*t\\v_{ox}=3780 \frac{m}{s}-5.1\frac{m}{s^{2} }*645s\\v_{ox}=490.5\frac{m}{s}$

For axis y

$a_{y}=7.30\frac{m}{s^{2}} \\v_{fy}=4470\frac{m}{s} \\v_{fy}=v_{oy}+a_{y}*t\\v_{oy}=v_{fy}-a_{y}*t\\v_{oy}=4470\frac{m}{s}-7.30\frac{m}{s^{2} }*645s\\v_{oy}=-238.5\frac{m}{s}$