What is the approximate resistance of a rheostat if the voltage source is 18 V and the current is 220 mA?
What is the approximate resistance of a rheostat if the voltage source is 18 V and the current is 220 mA?
How much voltage is needed to produce 2.5 A of current through a 200 Ω resistor?
How much voltage is needed to produce 2.5 A of current through a 200 Ω resistor?
When there is 12 mA of current through a 1.2 kΩ resistor, the voltage across the resistor is
When there is 12 mA of current through a 1.2 kΩ resistor, the voltage across the resistor is
A current of 200 µA through a 6.8 kΩ resistor produces a voltage drop of
A current of 200 µA through a 6.8 kΩ resistor produces a voltage drop of
What is the voltage source for a circuit carrying 2 A of current through a 36 Ω resistor?
What is the voltage source for a circuit carrying 2 A of current through a 36 Ω resistor?
The current through a flashlight bulb is 40 mA and the total battery voltage is 4.5 V. The resistance of the bulb is approximately
The current through a flashlight bulb is 40 mA and the total battery voltage is 4.5 V. The resistance of the bulb is approximately
What is the approximate filament resistance of a light bulb if it operates from a 110 V source and 0.6 A of current is flowing?
What is the approximate filament resistance of a light bulb if it operates from a 110 V source and 0.6 A of current is flowing?
If 24 V are applied across a resistor and there are 10.9 mA of current, the resistance is
If 24 V are applied across a resistor and there are 10.9 mA of current, the resistance is
According to Ohm's Law
According to Ohm's Law
Twelve volts are applied across a resistor. A current of 3 mA is measured. What is the value of the resistor?
Twelve volts are applied across a resistor. A current of 3 mA is measured. What is the value of the resistor?
The formula for finding voltage when resistance and current are known is V = I/R.
The formula for finding voltage when resistance and current are known is V = I/R.
A resistance of 3.3 MO is connected across a 500 V source. The resulting current is approximately
A resistance of 3.3 MO is connected across a 500 V source. The resulting current is approximately
The formula to find I when the values of V and R are known is
The formula to find I when the values of V and R are known is
When 12 V are applied across a 68 Ω resistor, the current is
When 12 V are applied across a 68 Ω resistor, the current is
What is the approximate resistance setting of a rheostat in which 650 mA of current flows with a 150 V source?
What is the approximate resistance setting of a rheostat in which 650 mA of current flows with a 150 V source?
Four amperes of current are measured through a 24 Ω resistor connected across a voltage source. How much voltage does the source produce?
Four amperes of current are measured through a 24 Ω resistor connected across a voltage source. How much voltage does the source produce?
Ohm's law describes how current is related to voltage and resistance.
Ohm's law describes how current is related to voltage and resistance.
If 750 µA is flowing through 11 kΩ of resistance, what is the voltage drop across the resistor?
If 750 µA is flowing through 11 kΩ of resistance, what is the voltage drop across the resistor?
A 120 V lamp-dimming circuit is controlled by a rheostat and protected from excessive current by a 3 A fuse. To what minimum resistance value can the rheostat be set without blowing the fuse? Assume a lamp resistance of 20 ohms.
A 120 V lamp-dimming circuit is controlled by a rheostat and protected from excessive current by a 3 A fuse. To what minimum resistance value can the rheostat be set without blowing the fuse? Assume a lamp resistance of 20 ohms.
The ampere is the unit of resistance.
The ampere is the unit of resistance.
How much resistance is required to limit the current from a 12 V battery to 3.6 mA?
How much resistance is required to limit the current from a 12 V battery to 3.6 mA?
The formula for finding resistance when current and voltage are known is R = I/V.
The formula for finding resistance when current and voltage are known is R = I/V.
If you wish to increase the amount of current in a resistor from 120 mA to 160 mA by changing the 24 V source, what should the new voltage setting be?
If you wish to increase the amount of current in a resistor from 120 mA to 160 mA by changing the 24 V source, what should the new voltage setting be?
How much current is produced by a voltage of 18 kV across a 15 kΩ resistance?
How much current is produced by a voltage of 18 kV across a 15 kΩ resistance?
You are measuring the current in a circuit that is operated on an 18 V battery. The ammeter reads 40 mA. Later you notice the current has dropped to 20 mA. How much has the voltage changed?
You are measuring the current in a circuit that is operated on an 18 V battery. The ammeter reads 40 mA. Later you notice the current has dropped to 20 mA. How much has the voltage changed?
An electric heater draws 3.5 A from a 110 V source. The resistance of the heating element is approximately
An electric heater draws 3.5 A from a 110 V source. The resistance of the heating element is approximately
Approximately how many milli-amperes of current flow through a circuit with a 40 V source and 6.8 kΩ of resistance?
Approximately how many milli-amperes of current flow through a circuit with a 40 V source and 6.8 kΩ of resistance?
A resistor is connected across a 50 V source. What is the current in the resistor if the color code is red, orange and silver?
A resistor is connected across a 50 V source. What is the current in the resistor if the color code is red, orange and silver?
How much resistance is needed to draw 17.6 mA from a 12 volt source?
How much resistance is needed to draw 17.6 mA from a 12 volt source?
Approximately how much current flows through a 3.3 MO resistor across a 30 V source?
Approximately how much current flows through a 3.3 MO resistor across a 30 V source?
