what will happen if we connect D.C. supply to transformer primary?

Answer 1

The iron core of the transformer will be saturated (it will be magnetized) but there will be no voltage at the secondary, when you disconnect the DC supply, the current will “collapse” in the primary winding and this will produce a very large voltage Impulse in both windings of the transformer, if the transformer is a step-up transformer the impulse at the secondary winding will be larger than that in the primary ( this is how the ignition system of gasoline engines work)

Answer 2

You'll get a brief pulse out of the secondary when you connect and disconnect the supply. Otherwise, nothing. The only way to induce current in a wire is for it to cut across the (imaginary)magnetic lines of force. This happens when the field is building up or collapsing, or when the conductor moves relative to the field (as in a generator). A transformer can work on AC or fluctuating DC as the input and the output will always be AC.

Answer 3

If you connect a DC supply to a transformer, it will behave the same as shorting your supply terminals together (after an initial transient period). The initial step function voltage input to the transformer will supply a current into the coil of wire which asymptotically increases to the value of R/V, where R is the resistance of the wire in the transformer and V is the voltage of your DC supply.

Answer 4

If you connect a battery (such as a 9 volt dry cell) to a transformer - nothing will happen. for you to get a reaction, you need to create a circuit with a toggle switch in-line. In the end, what you will do is have someone hold the wires leading away from the transformer...and push the switch - they will receive a shock.
here is a simple way to construct this little do-dad:
1. get a pig-tail that fits on the top of a 9 vold dry cell
2. get a transformer
3. get a push button toggle switch. when you push the switch it is on, when you let go it is of
4. wire

Connect the negative wire from the battery pig-tail to the negative side of the transformer and the positive side fo the battery's pigtail to one side of the push button. take a different piece of wire and attach to the other side of the push button and to the positive side of the transformer.
now go get a victim and have them hold the other 2 wires leading away from the transformer while you push down the button.. he he he

Answer 5

correctly or incorrectly ?
still no details ? the others are correct in a fashion but you still have to know what is going into the transformer however if you are connecting it so the output of the transformer is going into the Dc power supply you might have a viable system provided outputs and inputs are correct if you are going to set up a question like this you need to give proper information !

Answer 6

Short answer (channeling my old TA's):
Very Hot Transformer
Very Drained Power Source
Very Sad Secondary (no power)

Basically all your power goes through the primary like a short, no voltage induced on secondary (after initial spike)

Answer 7

There will be no output on the secondary winding. (Except at the instant of making the connection.)

If the wire resistance is low enough the connection might act as a short circuit and burn off the primary winding or the DC source.

Answer 8

Odds are you would have an explosion in your DC power source.

AC or Alternating Current switches from positive to negative at the rate of 60 times per second with a voltage of 110-110 volts (in the US, in Europe they have a line voltage of 230 volts with it changing from positive to negate 50 times per second). DC power or Direct Current provides power along the same line each time. The reverse of 120 volts would happen 60 times per second on an AC line so it would drive the DC power source to 120V plus the DC voltage and then at 60 times per second it would drive the DC voltage to 120v minus the DC voltage. The weaker power source, which is usually the DC, couldn't take the strain it would either burn out or explode.

A transformer can do one of two things. It can either increase the voltage by dropping the amperage, or it can increase the amperage by dropping the voltage. However, a transformer cannot convert power from AC to DC by itself. So no matter what rating of a transformer is used the DC power source will still either burn out or explode.

AC power is generated by a rotating conductor in a magnetic field so it keeps switching form positive to negative. The speed that it does it is measured in Hertz (60 hz in the US and 50 Hz in Europe). DC power is generated through a chemical or a photovoltaic reaction so the power doesn't change its polarity.

The only way to change the polarity of an AC circuit is to run it through a rectifier (which chops off half the power) or through an electric circuit called a bridge. A Wheston Bridge uses a series of resisters and diodes to convert the AC power to AC. A bridge is superior to a rectifier because it keeps switching the AC power as fast as the AC power is switching (again that is measured in hertz = cycles per second) so the power load is constant.

Answer 9

NOTHING.

This is because you are using Direct Current (D.C). A transformer is used to step up/down current/voltage using only Alternating Current (A.C)

The current is step up/down by creating magnetic field and TAP from the magnetic field. Using D.C The FLUX* is not available continuously to tap from it. so on your secondary no output can be expected.

Answer 10

It will burn out the transformer.
The coil is a dead short to D.C. current.