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True or false The device that turns a needle in a galvanometer is called an electromagnet.?
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∙ 11y ago
true
Wiki User
∙ 11y ago
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The device that turns a needle in a galvanometer is called an electromagnet?
True.
How galvanometer measures the charge?
A galvanometer is like a small DC motor with a spring to stop it from rotating all the way around. The greater the voltage the stronger = further the "motor" pulls the needle.
Why needle of tangent galvanometer move by increasing and decreasing current?
The galvanometer is oriented so that the plane of the coil is vertical and aligned along parallel to the horizontal component He of the Earth's magnetic field (i.e. parallel to the local "magnetic meridian"). When an electrical current flow through the galvanometer coil, a second magnetic field H is created. At the center of the coil, where the compass needle is located, the coil's field is perpendicular to the plane of the coil. These two perpendicular magnetic fields add vertically, and the compass needle points along the direction of their resultant He + H. The current in the coil causes the compass needle to rotate by an angle\ \theta.
Why a moving coil galvanometer is called so?
The term "galvanometer", in common use by 1836, was derived from the surname of Italian electricity researcher Luigi Galvani, who discovered in 1771 that electric current could make a frog's leg jerk. The deflection of a magnetic compass needle by current in a wire was first described by Hans Oersted in 1820. The phenomenon was studied both for its own sake and as a means of measuring electrical current. The earliest galvanometer was reported by Johann Schweigger at the University of Halle on 16 September 1820. Andre-Marie Ampere also contributed to its development. Early designs increased the effect of the magnetic field due to the current by using multiple turns of wire; the instruments were at first called "multipliers" due to this common design feature.
What is the arrow inside a compass called?
a needle
The device that turns a needle in a galvanometer is called an electromagnet?
True.
What will happen if you put a compass next to an electromagnet that is switched?
the compass's needle will point at the electromagnet
Would a powerfull electromagnet lift a needle out of a haystack?
Only if the needle was made of iron or copper
How galvanometer measures the charge?
A galvanometer is like a small DC motor with a spring to stop it from rotating all the way around. The greater the voltage the stronger = further the "motor" pulls the needle.
Is a electromagnet created when electric flows through a compass needle?
Yes
How do scientists extract human embryonic stem cells?
A micropipette, a device like a small needle, is inserted into the embryo, also called a blastocyst.
Does a galvanometer transform electrical energy into mechanical energy?
A galvanometer is an instrument that is used to measure current or voltage. It can have a mechanical movement, ie a needle that moves round a scale, or it can be digital as many are now.
Is an electromagnet created when electric current flows through a compass needle?
Yes
Is an electromagnet is created whene electric current flows through a compass needle?
no
What is a eletromagnet produced by?
I believe that it's spelled electromagnet. An electromagnet is produced by electricity flowing through a wire wrapped around a needle 30 or more times.
Does a galvanometer have a linear readout?
They try to make galvanometers so that a linear increase in current results in equal angular displacement of the needle.
Why needle of tangent galvanometer move by increasing and decreasing current?
The galvanometer is oriented so that the plane of the coil is vertical and aligned along parallel to the horizontal component He of the Earth's magnetic field (i.e. parallel to the local "magnetic meridian"). When an electrical current flow through the galvanometer coil, a second magnetic field H is created. At the center of the coil, where the compass needle is located, the coil's field is perpendicular to the plane of the coil. These two perpendicular magnetic fields add vertically, and the compass needle points along the direction of their resultant He + H. The current in the coil causes the compass needle to rotate by an angle\ \theta.
