Chapter 25 Physics

When there is a charge in the magnetic field in a closed loop of wire

Thrust a magnetic into a coil of wire and the coil

Electromagnetic induction occurs in a coil when there is a change in

When a bar magnet is thrust into a coil of copper wire, the coil tends to

Voltage can be induced in a wire by

The magnetic field strength inside a current carry coil will be greater if the coil encloses a

If a magnet is pushed into a coil voltage is induced across the coil If the same magnet is pushed into a coil with twice the number of loops

A device that transforms electrical energy into mechanical energy is a

A device that transforms mechanical energy into electrical energy is a

A transform actually transforms

The primary of a transformer is the coil connected to

Transformers use AC so there will be the required

The output power of an ideal transformer is

Disconnected a small voltage battery from a coil of many loops of wire and a large voltage is produced by

Power is transmitted at high voltages because the corresponding current in the wires is

Rapid change of magnetic piled induces

The metal detectors that people walk through in airports operate via

A step up transformer increases

A step up transformer has a ratio of one to ten neglecting slight losses, if 100 W of power go into the primary coil the power coming from the secondary coil is

A certain transformer doubles input voltage if the primary coil has 10 A of current, then the current in the secondary coil is

The principle advantage of AC power is that

Neon signs require about 12000 volts to operate if the circuit uses a 120 volt power source, the ratio of primary to secondary turns the transformer should be

The voltage across the i put terminals of a transformer is 110 V. The primary has 50 loops and the secondary has 25 loops the voltage he transformer puts out is

Four amperes of current exist in the primary coil of a transformer. The voltage across the primary coil is 110V what is the power output of the secondary coil

If the primary of a transformer were connected to a dc power source the transformer would have a voltage output