## What would be the effect of having more turns on the coil?

With more turns of wire within the coil, the greater the strength of the static magnetic field around it. By moving this bar magnet “in” and “out” of the coil a current would be induced into the coil by the physical movement of the magnetic flux inside it.

## Does adding more turns to the wire coil?

Adding more turns to the wire coil (increases, decreases) the strength of an electromagnet. Electromagnets change electrical energy into (chemical, mechanical) energy.

**Will a coil with more turns produce a lower voltage?**

As the magnetic field expands, it induces current in the second coil. A transformer whose primary coil has more turns than its secondary coil is called a step-down transformer because it reduces voltage — that is, the voltage at the secondary coil is less than the voltage at the primary coil.

**Does increasing the number of coils increase the magnetic field?**

As the number of turns increases the number of paper clips held increase. This means that the strength of the magnet increases with increasing number of turns in the coil.

### How do you increase voltage on a coil?

The induced voltage can be increased by winding the wire into a coil because the field lines intersect the circuit multiple times. The direction of the magnetic field produced by a coil can be determined by the right hand grip rule.

### Does thickness of wire affect inductance?

Inductance is affected by how much wire is in the coil and how close the turns are to each other. If you add more wire, by either making the diameter of the coil larger or adding more turns of wire, the inductance increases.

**Does inductance increase with current?**

Generally, B can get saturated, so with increasing current and therefore increasing H the permeability and hence the inductance decreases.

**How does coils affect magnetic field?**

The advantage of using the coil shape is that it increases the strength of the magnetic field produced by a given current. The magnetic fields generated by the separate turns of wire all pass through the center of the coil and add (superpose) to produce a strong field there.

#### Does increasing the number of coils around the nail increase or decrease the strength of the electromagnet can you explain why?

If you coil the wire around and around, it will make the magnetic force stronger, but it will still be pretty weak. The strength of an electromagnet can be increased by increasing the number of loops of wire around the iron core and by increasing the current or voltage.

#### What are the factors that affect inductance of a coil?

These factors all dictate inductance by affecting how much magnetic field flux will develop for a given amount of magnetic field force (current through the inductor’s wire coil): All other factors being equal, a greater number of turns of wire in the coil results in greater inductance; fewer turns of wire in the coil results in less inductance.

**How can the sensitivity of moving coil galvanometer be increased?**

An easy way is to optically magnify the notion with a mirror attached to the moving coil and a laser beam directed at it from a stationary position. The moving spot on the wall in the next room would be incredibly sensitive.

**How does magnetic permeability affect the inductance of a coil?**

CORE MATERIAL: All other factors being equal, the greater the magnetic permeability of the core which the coil is wrapped around, the greater the inductance; the less the permeability of the core, the less the inductance.

Numerically, the current sensitivity and megohm sensitivity are equal. Therefore, Where d = deflection of the ammeter in scale divisions. I = Ammeter current in micro amperes. 1. The mass of the moving parts must be kept minimum.