Table of Contents
Simple Ohms Law tells you the answer is 11 Ohms.
What is the resistance of a 1200 W 120 V hairdryer?
Answer and Explanation: This means that the resistance in the heating element of the hair drying is 10 Ohms.
What is the resistance of a 120 V 1500 W hair dryer and the current when it is in use?
R = 1920 Ω Calculate the resistance and the current of a 1500-Watt electric hair dryer plugged into a US household outlet (120 V).
What is the current in the 1300 WW 120 VV hair dryer when it is used?
The current flowing through this hair dryer is 12.5 eps Yeah, Luis R.
When a 1500w hair dryer is in use the current passing through the dryer may be represented as?
When a 1500-W hair dryer is in use, the current passing through the dryer may be represented as I = (17.7 A) sin (120πt).
What is the current drawn by a 1200 watt hair dryer connected to 120 V outlet?
from the expression watts = amperes X volts, we see that the current = 1200 W/120 V = 10 A, so the hair dryer will operate when connected to the circuit.
What are the three variables in Ohm’s law?
There is a very simple relationship between all three variables as you can see. Using the symbols V for voltage, R for resistance and I for current the formula for Ohm’s Law is: V = R × I. Note: Ohm’s Law is stated for a conductor at a constant temperature.
How much power is dissipated by each resistor in the circuit?
The power dissipated by each resistor can be found using any of the equations relating power to current, voltage, and resistance, since all three are known. Let us use P=V2R P = V 2 R , since each resistor gets full voltage. Thus, P1=V2R1=(12.0 V)21.00 Ω=144 W P 1 = V 2 R 1 = ( 12.0 V ) 2 1.00 Ω = 144 W .
What is the power rating of a device that draws 0.8 A when connected to 120v?
What is the power rating of a device that draws 0.8 A when connected to 120 V? 36 W. A pair of 60-W and 100-W incandescent lamps are intended for 120-V operation.
How much current does a hair dryer use?
Many hair dryers require about 1,875 watts, or 15 amps, of power. Because of this, it’s much easier to blow a circuit just by plugging your hair dryer in. Be aware of how many amps the circuits in your house can handle before you plug in too many devices to one outlet.
How do I calculate resistance?
If you know the total current and the voltage across the whole circuit, you can find the total resistance using Ohm’s Law: R = V / I. For example, a parallel circuit has a voltage of 9 volts and total current of 3 amps. The total resistance RT = 9 volts / 3 amps = 3 Ω.
Does resistance lower voltage?
Resistors don’t reduce current and voltage instead it opposes flow of current and produce drop in voltage across the terminals.
Does increasing resistance decrease voltage?
When the resistance increases, the voltage remains the same, and Ohm’s Law (V = IR) describes what happens to the current.
What is resistance in series circuit?
The total resistance of a series circuit is equal to the sum of individual resistances. The voltage drop across a resistor in a series circuit is directly proportional to the size of the resistor. If the circuit is broken at any point, no current will flow.
How do you calculate the power rating of a resistor?
Resistor Power (P) [ P = V x I ] Power = Volts x Amps. [ P = I 2 x R ] Power = Current 2 x Ohms. [ P = V 2 ÷ R ] Power = Volts 2 ÷ Ohms.
How do you calculate the energy dissipated by a resistor?
W=VIt. Because this circuit consists of only one resistor, the entire work done goes into energy lost through power dissipation by this resistor, by conservation of energy. Differentiating with respect to time, one obtains the rate of power dissipation in the resistor: P = d W d t = I V = I 2 R = V 2 R .
What is the resistance of a 120 W incandescent lamp?
What is the resistance of a 120-W incandescent lamp connected to a 120-V power supply? twice what it should be. 220 ohms.
What is the current in a 100 W bulb connected to a 120 V source?
or current=100/120=0.833 amperes.
When you touch your fingers resistance 1000 Ω to the terminals of a 6 V battery What is the current moving through your fingers?
Problem: When you touch your fingers (resistance 1000 Ω) to the terminals of a 6 V battery, show that the small current moving through your fingers is 0.006 A.
Can you run a hair dryer on a 15 amp circuit?
A 15A breaker will carry this indefinitely, and the wiring will be safe. Just don’t plug anything else into the same circuit, such as a curling iron. Normally a hair dryer will not be used for a long period of time. Bottom line – people commonly use 1875W hair dryers on 15A circuits without any problem.
How many volts is a hairdryer?
220 Volt Hair Dryers | 240 Volt Blow Dryers.
How many amps does a dryer use?
Residential electric clothes dryers use between 7.5 amps and 30 amps. However, 30 amps is by far the most common. The National Electrical Code (NEC) standards require that 240V dryers have a dedicated 4-wire circuit (10-3 type NM cable with ground) protected by a 30 amp breaker.
What is the total resistance?
The total resistance R of two or more resistors connected in series is the sum of the individual resistances of the resistors.
What size resistor do I need to reduce voltage?
To reduce voltage in half, we simply form a voltage divider circuit between 2 resistors of equal value (for example, 2 10KΩ) resistors. To divide voltage in half, all you must do is place any 2 resistors of equal value in series and then place a jumper wire in between the resistors.
What is current voltage and resistance?
Electricity is the movement of electrons. Electrons create charge, which we can harness to do work. Voltage is the difference in charge between two points. Current is the rate at which charge is flowing. Resistance is a material’s tendency to resist the flow of charge (current).
What is the relationship between voltage and resistance?
The relationship between voltage, current, and resistance is described by Ohm’s law. This equation, i = v/r, tells us that the current, i, flowing through a circuit is directly proportional to the voltage, v, and inversely proportional to the resistance, r.
