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3 years ago

Identify a situation in which you would want to have a high

Physics

2 answers:

Andreyy893 years ago

7 0

Answer: A voltmeter must have a high resistance where as an ammeter must have a low resistance.

Explanation:

A voltmeter is a device which is connected in parallel to the component across which voltage needs to be measured. In a parallel circuit voltage drop is same at the nodes. The parallel connection must not offer easier path for current to divert from the main circuit and travel. Thus, a voltmeter must have high resistance.

On the other hand, an ammeter which is used to measure current in the circuit must have low resistance as it is connected in series. It should not offer resistance as it would reduce the actual current and measurement would be inaccurate.

Allushta [10]3 years ago

7 0

Higher resistance - on heater (need water temperature ASAP)
Lower resistance - any electricity wire on the street (energy supply to the households, not to loose much on the way)

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A child accidentally drops a toy from his apartment window. It falls for 1.05 seconds. What is the velocity of the toy just befo

AVprozaik [17]

Sorry!

This cannot be answered. We don't have weight, height, etc.

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3 years ago

Cyclotrons are widely used in nuclear medicine for producing short-lived radioactive isotopes. These cyclotrons typically accele

lyudmila [28]

Answer:

Part a)

$v = 3.16 \times 10^7 m/s$

Part b)

r = 0.166 m

Explanation:

Part a)

As we know that the energy of the Hydride ion is given as

$E = 5 MeV$

here we have

$\frac{1}{2}mv^2 = 5\times 10^6(1.6 \times 10^{-19})$

also we know that

$m = 1.6 \times 10^{-27} kg$

now we have

$v = \sqrt{\frac{2 \times 5 \times 10^6(1.6 \times 10^{-19}}{1.6\times 10^{-27}}$

$v = 3.16 \times 10^7 m/s$

Part b)

As we know that magnetic force on the charge is centripetal force

so we have

$qvB = \frac{mv^2}{r}$

so we have

$r = \frac{mv}{qB}$

so we have

$r = \frac{1.6 \times 10^{-27}(3.16 \times 10^7)}{(1.6 \times 10^{-19}) 1.9}$

$r = 0.166 m$

4 0

3 years ago

Differeciate the following types of variables:Independent,dependent and control variables

adelina 88 [10]

A control variable is the one element that is not changed throughout an experiment.A dependent variable is a variable whose variation does not depend on that of another.A independent variable is a variable whose value depends on that of another.

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3 years ago

All describe the relationship of the parts of an electrical current except: _________.

kaheart [24]

C. Electrical current increases as resistance decreases

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3 years ago

A particular motor can provide a maximum torque of 110 n • m. assuming that all of this torque is used to accelerate a solid, un

hjlf

Using the rotational equivalent of force:

Which is T = I*Alpha

Where: T is torque, I is the moment of inertia and Alpha is the angular acceleration.

This is for the flywheel: J = 1/2mr^2 = 5*3^2 = 45 kgm^2

From the equation:

T = J*dω/dt

we get:

Δt = J*Δω/T = 45*8.13/110.0 = 3.326 sec

5 0

3 years ago