The potential difference across a 4 ohm resistor is 20 volts. Assuming that all of the energy dissipated by this resistor is in the form of heat, how many joules of heat are radiated in 10 seconds?

Q: The 120 V electric heater in a coffee maker has a resistance of 15 Ω. How long will it take for this…

A: Given: The voltage of electric heater is V=120 V. The resistance of electric heater is R=15 Ω. The…

Q: How much electrical energy (in kilowatt hours) would a 45.0 W light bulb use in 60.0 days if left on…

A: Given that                     The power of the bulb is (P) = 45W                      Time = 60days…

Q: The electric power of a lamp that carries 2-A at 120-V is

A: electric power = Current x  voltage   electric power of a lamp = (2A) x (120V)  electric power of a…

Q: A 1.00-MΩ voltmeter is placed in parallel with a 75.0-kΩ resistor in a circuit. If the current…

A: Assume the resistance of the resistor is R1 = 75.0 kΩ. Assume the resistance of the voltmeter is R2…

Q: A current of 1.78 A fHows through a 58.2 2 resistor for 9.1 min. How much heat was generated by the…

A: Given data:  Current (I) = 1.78 A Resistance (R) = 58.2 Ω Time (t) = 9.1 min Required: Heat…

Q: A 10-Ohm resistor has a constant current of 5.0 A. What is the rate at which the electric energy is…

A: Recall P=i2R Where i is current and R is resistance of the resistor.

Q: When a voltmeter is connected across the terminals of a resistor, what usually happens to the…

A: When voltmeter is connected across the resistor, then the potential difference across the resistor…

Q: If it takes 8 minutes to boil a quantity of water electrically, how long will it take to boil the…

A: Given  Time to boil water t1=8min Initial current I Final current I2=2I

Q: The resistance of electric heater is 14 Ohm when connectedto 120 V What is the power consumption of…

A: Given, the resistance of electric heater is R=14 Ohm when connected to a voltage source, V=120 V We…

Q: What is the energy used to run a 9v circuit with a 90 ohm resistor for 10 seconds?

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Q: How much more energy does a 100 W light bulb use if it is left on 2.08 hours, versus a high…

A: Energy consumed by 100W bulb is E=Pt=100 W2.08 h=0.208×103 Wh=0.208 kWh

Q: An electric dryer consumes 6.0 x 10° joules of energy when operating at 220 volts for 30 minutes.…

A: Given data:  Energy (E) = 6.0×106 J Voltage (V) = 220 V Time (t) = 30 minutes Required: Current (I)

Q: An electric bulb is rated 220 V and 100 W. When it is operated on 110 V, thepower consumed will be…

A: The electric power (P ) is calculated as, Where, P = power V = voltage across the resistance R =…

Q: When a voltmeter is connected across the terminals of a resistor, what usually happens to the…

A: The voltmeter is a device which is used to measure the potential difference between two points.

Q: What is the heat generated (in J) in a heating element of resistance 1000 Ω when a current of 0.1 A…

A: Resistance (R) = 1000 ohm Current (i) = 0.1 ATime (t) = 25 seconds Using formula for heat generated…

Q: The p.d across a 4 ohm resistor is 20v. Assuming all the energy dissipated by this resistor is in…

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Q: Appliances that require a lot of power, such as a dryer or a stove, typically run on 240 V, and…

A:

Q: What is the potential difference across a 15 ohms resistor when a current of 6.5A passes through it?

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Q: What will be the value of current through a resistor of 40 ohm when the potential difference…

A: Given, Resistance, R = 40 ohm Potential difference, V = 20 V

Q: A heater is being designed that uses a coil of 14-gauge nichrome wire to generate 300 W using a…

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Q: If the emf of the battery is 9.0 V, what is its terminal voltage when the switch is closed if the…

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Q: An electric iron operating at 120 volts draws 10 amperes of current. How much heat energy is…

A: Potential difference V = 120 volts. Current I = 10 A. Time t = 30 s. Energy E = V x I x t

Q: The heating element in a clothes dryer is rated at 5 Kw and 220 V. How much current does it draw?

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Q: A light bulb has a resistance of 360Ω when turned on. How much current in will flow thru it when it…

A: Given, Resistance=r=360 Ω volatge=v=220 V let current i flow through bulb from ohms law we know the…

Q: How much power is produced with a 10 Volt battery delivering its current to a 10 Ohm resister?

A: Given : Voltage = 10 V Resistor = 10 Ohm Required : Power, P

Q: What voltage drop will be there across a 1 kw electric heater element whose resistance when hot is…

A: The electric power in terms of voltage and resistance is  P =V2R

Q: What If? For what value of  (in volts) will the current in the ammeter read 1.59 A?

A:

Q: What is the resistance (in Ω) of a 9.00 ✕ 102 Ω, a 2.90 kΩ, and 5.00 kΩ resistor connected in…

A: Given data:  R1 = 9.00 ×102 Ω = 900 Ω R2 = 2.90 kΩ = 2900 Ω R3 = 5.00 kΩ = 5000 Ω Resistors are…

Q: In a parallel combination of two resistors, the value of the effective resistance of the combination…

A: The equivalent resistance of a parallel combination of two resistors is given by

Q: Electric heater is used to heat 0.63 liters/minute of 3. water (c, = 4.18 kJ/kg.K, density =1000…

A: 0.63lit=0.00063m3Mass of 0.00063m3=0.00063m3×1000kg/m3=0.63kg Heat reqired to raise the temperature…

Q: Of what material is a resistor made if its resistance is 40.0% greater at 100.0 °C than at 20.0 °C ?

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Q: In the figure, the total resistance is 10kΩ, and the battery's emf is 20.0 V.If the time constant is…

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Q: How much electrical energy (in KWh) would a 120 W light bulb use in 34 days if left on steadily?

A: Power of the light bulb, P = 120 W = 0.12 kW Number of days, n = 34   Total number of hours used is…

Q: The resistance of electric heater is 75 Ohm when connectedto 120 V What is the power consumption of…

A: Given that :Resistance of the electric heater (R) = 75 ohmVoltage ( V) = 120 VPower consumption (P)=…

Q: The resistance of electric heater is 32 Ohm when connectedto 120 V What is the power consumption of…

A: Answer:        Given Values,

Q: The resistance of electric heater is 13 Ohm when connectedto 120 V What is the power consumption of…

A:

Q: How much work is done by 600 W electric toaster in 2.5 minutes?

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Q: A 0.50-W, 220- Q resistor carries the maximum current possible without damaging the resistor. If the…

A:

Q: What is the effective resistance of a car's starter motor when 150 A flows through it as the car…

A: Given data The current is Io=150 A The potential difference supplied by the battery is Vo=11.0 V…

Q: If the copper wire of an electromagnet has a resistance of 0.300 Ω when at room temperature (20 oC)…

A: Given: The resistance of the wire at a temperature of 20oC is 0.300 Ω. The final resistance of the…

Q: If you were to place a 3kΩ resistor across a 9 volt battery, what is the power dissipated from this…

A: Given data:  Resistance (R) = 3 kΩ = 3000 Ω Battery (V) = 9 V Required: Power (P)

Q: What is the maximum voltage that can be applied to a 10-k Ω resistor rated at 1/4W ?

A: Given data The resistance is given as R = 10 kΩ. The Power is given as P=14 W=0.25 W.   The…