Short-Questions

Fast solutions for complex problems

22

Which type of current attracts AC or DC?

Alternating current (AC) varies between positive peak value to negative peak value in a fixed time interval. For time when it is in positive region, it attracts and when it is in negative region it repels.

Why do we prefer DC over AC?

Hence, the voltage through transmission lines is very high, which reduces the current, which in turn minimizes the energy lost through transmission. This is why alternating current is preferred over direct current for transmitting electricity, as it is much cheaper to change the voltage of an alternating current.

Does DC current attract human body?

Does AC current attract and DC repel our body? No. Any kind of electrical current will tend to cause muscles to contract. Depending on which muscles are in the electrical path, this might cause your hand to tightly grasp a conductor or it might cause your arm and/or leg muscles to spasm, throwing you across a room.

Why is DC shock repulsive?

DC is attractive whereas a.c is repulsive. In nature, the electrical shock produced by alternating and direct current are 888-609- 888-609- DC gives us an attractive shock and alternating current gives us a repulsive shock.

Why DC is not used in homes?

Direct current is not used at home because for the same value of the voltage, DC is more lethal than AC since direct current does not go through zero. Electrolytic corrosion is more an issue with direct current. DC inductors are more complicated. It requires commutators, electronic switches and brushes.

Which is safer AC or DC?

An electric shock has the capacity to induce ventricular fibrillation which can lead to heart failure and death. Avoiding any form of electric shock is preferable, but DC is considered safer in these circumstances as the human body’s threshold to DC is considerably higher than to AC.

Why is AC shock attractive?

AC reverses direction periodically causing an attractive force to the body on change of cycles.

Which shock is attractive AC or DC?

The argument in favour of DC current Hence, it is believed that the DC current shock is more dangerous. Whereas, in the case of AC current, the person experiencing the electric shock can pull their hand back as the current goes to zero. Hence, it is believed that the AC current shock is least dangerous than DC current.

Do houses use DC or AC?

When you plug things into the outlet in your house, you don’t get DC. Household outlets are AC – Alternating Current. This current has a frequency of 60 Hz and would look something like this (if you plotted current as a function of time).

Does Europe use DC or AC?

In the USA the two commonly supplied shore-power voltages are 120 Volts (60Hz) AC and 240 Volts (60Hz) AC. The standard in Europe is 230 Volts (50Hz) AC. All of these supplies are single phase, but there are differences in the supply wire configurations and consequently in the power distribution panel structure.

Why is DC attractive in nature?

at every sinusoidal reversal your body potential is reversed, thats why it is attractive. in case of DC source, its creates a capicitive effect, once your body is charged with DC potential then its repell the body from source. also for same potential difference, lethality current range for DC is higher.

Why DC is not used in home?

Which is worse AC current or DC current?

In the case of AC shock, physiologically the disorientation of the pulsatile shock can disorient the brain and prevent a person from with drawing from the source, leading to a greater damage. I do not know how a higher frequency shock would work. 50 Hz is a bad frequency for shocks.

What happens when you touch an AC current?

Since our body fluids are ionic in nature, when you touch a wire carrying AC current, the polarity of your body in contact with the wire becomes same as that of wire. But then suddenly AC reverses the polarity…Unlike charges attract each other and this phenomenon repeats.

How many milliamps of AC current can kill you?

The severity of the shock you get depends on both the voltage that is applied and the current that flows through the body. That in turn depends on many things like the body resistance, time of exposure to the current, maximum current driving capacity of the source etc.. In general, 100 mA (milliAmps) of 50 Hz AC current is enough to kill.