Fundamentals of Physics + electrical engineering - practice problems - page 2 of 5
Number of problems found: 91
- Cross-section 71254
The steel conductors of the long-distance power line have a cross-section of 5 cm². Calculate the resistance of a steel wire with a length of 2 km if the resistivity of the steel is 13 * 10-8 Ω · m. - Instantaneous 69064
Describe how the instantaneous power value in the AC circuit changes during one period. - A fan
A fan with a resistance of 20 Ω is connected to a power supply. The current flowing through the circuit is 2.5 A. What is the voltage of the power supply? - Cross-section and coulombs
Determine the current flowing through the conductor if a charge of 150 C has passed through its cross-section in one minute.
- Conductor 66234
For how long does a charge of 600 C pass through the conductor at a current of 1 A.? - Resistance 66074
Determine the current flowing through the car's starter, whose resistance is 60 milliohms at 12V - Resistance 66054
The handset has a resistance of 4000 ohms. Calculate what voltage is connected to them if the current passes 2.5mA. - Perpendicular 62824
The magnetic induction vector at a given field location has the direction: a) to the south magnetic pole b) tangent to the induction line c) to the north magnetic pole d) perpendicular to the tangent to the induction line - Voltage - Kirchoff laws
At a voltage of 2.5V, a current I1= 20mA flows through the resistor. What will the voltage be at the resistor's ends when the current I2= 1,2A passes through it?
- Resistance 58091
Does the copper conductor have a resistance of 2.8Ω at 36 °C? What will be the resistance value after cooling to -22 °C? - Cooker spiral
A current of 4.4 A flows through the spiral of the electric cooker. It is connected to a voltage of 220 V. What is the resistance of the spiral? - Manganin
How long must a manganin wire with a diameter of 0.8 mm have a value of 10Ω? - Serial resistors
In the circuit shown ( two resistors, R1 and R2 serial connected), the total resistance from A to B is 16 ohms. Find the resistance R2 and the current through the R1 = 12-Ohm resistor if the voltage between A and B is 10 V. - Direction indicator
When a current of 1.6 A passes through the lamp direction indicator's 7400 mOhm resistance, which voltage is connected to it?
- Resistance 49711
The car's low beam bulb filament has a resistance of 5 Ω. How much electric current flows through it at the standard car battery voltage of 12 V? - Individual 47281
Two resistors, R1 = 300 ohms and R2 = 600 ohms, are connected next. A voltage of 220V is connected. Determine the total resistance by which we can replace both the electric currents passing through the individual resistors and the electric current passing - Individual 46993
We measured the voltage U= 75 V between the circuit's external terminals with a voltmeter. The circuit's resistance values of the individual resistors (in series) are 50 Ohm and 100 Ohm. Find out what voltage we would measure on the 1st and 2nd resistor - Resistance 44911
Determine the resistance of a bulb whose wattage at a source voltage of 220 V is 15 W. - The output
The output voltage of the transformer is 880 V. The secondary coil has 1200 turns. Transformation ratio k = 4. Find the voltage to which the primary coil is connected. How many turns does the primary coil have if a current of 1 A flows through it? What cu
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