The unit for measuring current is the
The unit for measuring resistance is the
In a simple circuit a voltage of 5 volts is applied across a resistance of 10 ohms. The current in the circuit is
The power dissipated in the resistor in the previous question is
What is the power drawn from the battery in question 3?
A flashlight bulb draws 2.5 amps when connected to two C cells (3 volts). What is its resistance?
What is the power disipated in the bulb in question 6?
A lantern bulb with a resistance of 4 ohms draws 1.5 A when connected to a certain battery. The battery voltage is
A 1000 watt appliance is used 10 hours a day for 28 days per month. If the cost of electricity is $.10 a kwh (kilowatt-hour), how much does it cost to operate the appliance for a month?
What is the cost of electricity in mils/J if it costs $.10 per kwh? (A mil is 1/1000 cent).
One billion electrons pass a certain point in a micro second. This coresponds to a current of
Three amps corresponds to how many electrons per seconds?
What is the 'average'(rms) speed of the electrons in a wire at 30 oC?
A 2 amp current flows in a conductor which has 1x1024 free electrons per meter. What is their average drift velocity in the direction of the current?
If the circuit in the above question is a 20 foot long wire in your automobile, how long would it take an electron to travel from the negative terminal to the positive terminal of the battery?
Two otherwise identical wires are made of different materials, the second having twice the resistivity of the first. The first has a resistance of 2 ohms, the second has a resistance of
Two aluminum wires have the same diameter but the second is twice as long as the first. If the first has a resistance of 2 ohms, the resistance of the second is
Two copper wires have the same length but the second has twice the diameter of the first. If the resistance of the first is 2 ohms, the resistance of the second is
What is the resistance of a 10 km long copper wire with a diameter of 4mm?
If the wire in the above question has a resistance of 10 ohms and is transmitting 10 kW at 1000 volts how much power is lost in the wire?
If the power in the above question is being transmitted at 10000 volts, what is the power loss in the wire?
If the peak AC voltage is 150 volts, what is the rms voltage?
If the rms current is 30 amps, what is the peak current?
One thousand peak AC watts is how many rms watts?
What is the internal resistance of a 1500 watt electric space heater operating at a standard house voltage of 120 V?
