Physics, 19.08.2019 16:00 daisa02

Why is a voltmeter is always connected in parallel in a electric circuit?

Answers: 2

Show answers

Answers

An ideal voltmeter has infinitely large electrical resistance. Thus, to be introduced in parallel with the element on which to measure the voltage will not disturb the circuit. If the voltimeter is placed in serie, will interrupt the circuit because its resistance is too large.

Answer from: luiscastaenda

A voltmeter is not placed "in a circuit". It measures the potential difference
between two points in the circuit, so it only touches the two points. Technically,
that places the voltmeter in parallel with everything else in the circuit that's between
those two points.

Answer from: Quest

given data:

determine the horse power (h.p) = ?

force applied to move the box(f) = 10 pounds,

box lifted from a distance (d) = 3 feet

time taken to lift (t) = 10 sec,

the horse power is defined as amount of work required to move a load. the horse power is equal to 550 foot-pound per second

1 h.p = 550 foot-pound/second

it can also be defined as the the load that need to be move a body for certain distance in a certain amount of time.

mathematically,

h.p = (force × distance)/ time

= (10 × 3)/ 10

= 30/10

= 3 foot -pound/sec

hence, the horse power is needed to move the box is 3 foot-pound/second

important note: 1 h.p = 550 foot-pound/second = 746 watts

Answer from: Quest

the working equation for the angular size is the product of the physical size and 360 degrees divided by the product of two pi and distance from earth. the minimum size would be 0.559 degrees while the maximum size would be 0.49 degrees.

Another question on Physics

Physics, 20.06.2019 18:02

Why the fortune tellers never win the lottery

Answers: 1

Answer

Physics, 22.06.2019 11:50

The scalar triple product computes the magnitude m of the moment of a force vector f about a specified line. it is m = (r × f) · n, where r is the position vector from the line to the point of application of the force and n is a unit vector in the direction of the line. use matlab to compute the magnitude m for the case where f = [12, −5, 4] n, r = [−3, 5, 2] m, and n = [6, 5, −7].

Answers: 3

Answer

Physics, 22.06.2019 14:30

What was the first instrument to ever record an earthquake?

Answers: 1

Answer

Physics, 22.06.2019 14:40

Asolid cylinder and a cylindrical shell have the same mass, same radius, and turn on frictionless, horizontal axles. the cylindrical shell has light-weight spokes connecting the shell to the axle. a rope is wrapped around each cylinder and tied to blocks of equal masses that are held the same height above the ground. both blocks are released simultaneously. the ropes do not slip. which block hits the ground first? or is it a tie?