If you are referring to the voltage at your residence, then voltage variation is caused by the changes to the load on your supply network. The network load varies throughout the day, being busiest, for example, around lunchtime and around dinnertime. The resulting load current variation causes the supply voltage to vary (it drops when the load current increases) but, by law, your supplier is obliged to maintain any voltage variation within limits -in the UK, for example, these limits are between +10% and -6% of the nominal 230 V.
To increase or decrease speed of an object, a force is needed.
To increase or decrease speed of an object, a force is needed.
To increase or decrease speed of an object, a force is needed.
To increase or decrease speed of an object, a force is needed.
Force causes things to slow down or speed up. Slow down or speed up iinvolves acceleration which is the result of force, a=f/m.
To increase or decrease speed of an object, a force is needed.
acceleration
f
No. Power is constant. Transformers neither increase nor decrease power, except for minor losses. They increase or decrease voltage, and they decrease or increase current, but the product of voltage and current, i.e. power, remains the same.
It should decrease
The frequency would decrease the gain and increase the output voltage
due to decrease in power factor
Increase, decrease, or remove the load <<>> Change the voltage and the current will also change in direct proportion, Ohms law.
A transformer is used to increase or decrease alternating voltage.
An increase in load (equivalent to a decrease in resistance*) causes an increase in load current. This increases the internal voltage drop within the transformer, and the terminal voltage reduces accordingly.[*An increase in load means more current is being drawn by that load, so an increase in load is equivalent to a decrease in load resistance]
Increase resistance
Electromagnets are never used to increase or decrease the voltage in a circuit. These magnets in conjunction with a rotating device (an armature) can create a voltage but the do not have any effect on a voltage.
No. Power is constant. Transformers neither increase nor decrease power, except for minor losses. They increase or decrease voltage, and they decrease or increase current, but the product of voltage and current, i.e. power, remains the same.
To increase (current) flow in a circuit you increase voltage (or decrease resistance). Ohm's Law: Current = Voltage divided by resistance
It should decrease
an increase in volume and/or a decrease in mass
no
Mainly to increase or to decrease the incoming voltage
The frequency would decrease the gain and increase the output voltage
No. A step-down transformer's secondary voltage is lower than its primary voltage. The secondary current is determined by the load, and this causes a higher current in the primary winding.