The instrument which is used to control current in an electric circuit is rheostat .
How do you control current in a circuit?
The current in a circuit is directly proportional to the electric potential difference impressed across the circuit and inversely proportional to the resistance of the circuit. Reducing the current can be done by reducing the voltage (choice A) or by increasing the resistance (choice D).
What device reduces current?
Fuse . A fuse is an electrical safety device that has the capability to protect an electric circuit from excessive electric current. It is designed to allow current through the circuit, but in the event that the current exceeds some maximum value it will open, severing the circuit.
Which component controls the amount of current?
Resistor is a component used to control the current.
Resistors are used to reduce the current flow in the electronic circuits that would reduce the adjust signal levels, reduce current flow, bias active elements, divide voltages as well as terminates transmission lines.
How do you reduce voltage and maintain current?
In order to lower the amperage of an electrical circuit, you must either lower the circuit’s voltage or increase its resistance. Lowering amperage is done by applying Ohm’s law, given by the formula I = V/R , where I is the circuit’s total current in amperes, V is the voltage and R is the resistance.
Is zener a diode?
A Zener diode is a silicon semiconductor device that permits current to flow in either a forward or reverse direction. The diode consists of a special, heavily doped p-n junction, designed to conduct in the reverse direction when a certain specified voltage is reached.
What happens if current is too high?
If the current is too large, the heat loss can damage the circuit , burn the resistors, or even burn the surrounding objects. Even with circuits designed to prevent such situations, accidents can happen, such as when wires touch each other unexpectedly.
Which material is used to disconnect the flow of current?
Wires are wrapped with a material called an insulator. This material does not easily carry electrons. Insulators keep the conductors inside a wire from touching each other and interrupting the flow of electrons. Rubber, plastic, and glass are good insulators.
What limits current flow?
The property of a material that limits current flow is known as its resistance (R) , the unit of resistance is the ohm (Ω). Resistance to alternating current is more properly called impedance but, in this application, resistance and impedance can be considered to be equivalent.
Who I am I am a component used to control the current?
Answer. Resistor is a component used to control the current. Resistor is the passive two-terminal electrical component implementing the electrical resistance mainly element circuit.
What does DC stand for in electricity?
Direct current (DC) is electrical current which flows consistently in one direction. The current that flows in a flashlight or another appliance running on batteries is direct current.
What unit is used in measuring voltage?
Voltage is measured in the unit of the volt (V) . Current is measured in the unit of the ampere, or amp (A).
How can we reduce load current?
Decrease Load Current
Limiting the amount of equipment that can be connected to a single circuit will limit the load current on the circuit. Limit the number of receptacles on each branch circuit to three to six . Install individual branch circuits to sensitive electronic loads or loads with a high inrush current.
How do you reduce voltage?
The simplest way to reduce voltage drop is to increase the diameter of the conductor between the source and the load , which lowers the overall resistance. In power distribution systems, a given amount of power can be transmitted with less voltage drop if a higher voltage is used.
What is current formula?
The current is the ratio of the potential difference and the resistance. It is represented as (I). The current formula is given as I = V/R .
What is the principle of Zener diode?
Zener Diode Working Principle
That is, in forward bias it allows current, and in reverse bias it blocks current . After this voltage has surpassed the breakdown point (in reverse bias), the diode falls in the Zener region, where it conducts without getting damaged. Current in this region is called avalanche current.
