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3 years ago

Whatis electro magnetic induction?

1 answer:

6 0

Electromagnetic induction is a process where a conductor placed in a changing magnetic field or a conductor moving through a stationary magnetic field causes the production of a voltage across the conductor.

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When a potential V is applied across a capacitor, a charge q is stored. What charge is stored if the potential across the capaci

Readme [11.4K]

Answer:

q' = 0.5q

Hence, the charge stored is also halved

Explanation:

The capacitance of a capacitor is given by the following formula:

$C = \frac{q}{V}$ ------- eqn(1)

where,

C = Capacitance of the capacitor

q = charge stored in the capacitor

V = potential across the capacitor

Now, if we make potential half of its initial value:

$C = \frac{q'}{0.5V}\\\\CV = 2q'\\using\ eqn(1):\\\frac{q}{V}(V) = 2q'\\\\$

q' = 0.5q

Hence, the charge stored is also halved

4 0

3 years ago

Why are more firefighters needed to help hold the fire hose when the increase of water flow increases the force of the water?

kondaur [170]

they are needed to withstand the recoil as tons of water are ejectedd at high speed ... like a cannon

6 0

3 years ago

Read 2 more answers

Which of the following best explains energy transformations that would occur if the archer were to release the bow string in eac

Yakvenalex [24]

Answer:

a)the arrow will have a very little kinetic energy after the archer and its realesead the string in the picture of the right

Explanation: you are at my same school and I pass it correct also as shown in the image it should be like that

4 0

3 years ago

On average, both arms and hands together account for 13 % of a person's mass, while the head is 7.0% and the trunk and legs acco

lianna [129]

Answer:

$\dot n_{f} = 85.177\,rpm$

Explanation:

The expression for the moment of inertia of the person is:

Arms outstretched

$I = \frac{1}{12}\cdot (0.13)\cdot (61\,kg)\cdot (1.40\,m)^{2} + \frac{1}{2}\cdot (0.87)\cdot (61\,kg)\cdot (0.35\,m)^{2}$

$I = 4.546\,kg\cdot m^{2}$

Arms parallel to the trunk

$I = \frac{1}{2}\cdot (61\,kg)\cdot (0.35\,m)^{2}$

$I = 3.736\,kg\cdot m^{2}$

The final angular speed is found by means of the Principle of Angular Momentum Conservation:

$I_{o}\cdot \dot n_{o} = I_{f}\cdot \dot n_{f}$

$\dot n_{f} = \frac{I_{o}}{I_{f}}\cdot \dot n_{o}$

$\dot n_{f} = \left(\frac{4.546\,kg\cdot m^{2}}{3.736\,kg\cdot m^{2}}\right)\cdot (70\,rpm)$

$\dot n_{f} = 85.177\,rpm$

8 0

3 years ago

Difference between perception and perspective

polet [3.4K]

Perspective is the evaluation or analysis of something, the way we think.
perception is a way of interpreting and understanding something.

3 0

4 years ago