An element has a voltage of 10 V across its terminals. If a current of -2 A enters the positive terminal, how much power is the element absorbing?
Explanation
This question tests the application of the power formula (p=vi) combined with the passive sign convention to correctly calculate absorbed power, which can be negative, indicating the element is supplying power.
Other questions
What is the fundamental relationship that defines Ohm's Law for a linear resistor?
According to the passive sign convention, when is power considered to be absorbed by a circuit element?
What is the defining characteristic of an ideal independent voltage source?
A 560 ohm power resistor has a current of 42.4 mA flowing through it. What is the power it is dissipating?
Which symbol is used to distinguish a dependent source from an independent source in a circuit diagram?
What is the conductance (G) of a resistor with a resistance (R) of 2 kilo-ohms?
In the International System of Units (SI), what is the definition of the watt (W)?
The total charge q(t) flowing past a point is given by the function q(t) = 5e^(-t/2) C. What is the current i(t) at t = 2 seconds?
What is the difference between an electrical network and an electric circuit?
Which of the following expressions correctly represents power absorbed by a resistor in terms of its voltage v and resistance R?
A device is supplied with 120 V and absorbs 60 W of power. Assuming the passive sign convention, what is the current flowing into the positive terminal of the device?
What is the primary reason for using the concept of 'circuit modeling' in electrical engineering?
What is defined as a 'short circuit' in the context of resistance?
Which of the following is NOT one of the seven base units of the SI system listed in Table 2.1?
A current of 1 milliampere is created by electrons moving from left to right in a wire. If I1 is the current with a reference arrow pointing right, and I2 is the current with a reference arrow pointing left, what are the values of I1 and I2?
What is the correct way to express the quantity 0.048 W using engineering notation?
In the context of circuit analysis, what does the term 'resistivity' (ρ) represent?
A current-controlled current source (CCCS) is shown in a circuit. What does its output current depend on?
If it takes 5 picojoules (pJ) of energy to move an electron from point A to point C, what is the potential difference between A and C, with the positive reference at C?
An ideal 2 A current source is connected to a 10 ohm resistor. What is the voltage across the current source?
A soft copper wire has a resistivity of 1.7654 micro-ohm-cm. If the wire is 100 cm long and has a cross-sectional area of 0.01 cm^2, what is its approximate resistance?
A dependent voltage source is labeled as 5*ix. What kind of dependent source is this?
What is the total charge transferred between t=0 and t=2s if the current is given by i(t) = 3t^2 A, and q(0) = 0?
What does a negative value for absorbed power, calculated using the passive sign convention, signify?
If a resistor has a voltage of 1 V across it and its resistance is 2 kOhm, what is the power absorbed by the resistor?
Which statement is true regarding the definition of a voltage in a circuit?
Which SI prefix represents the factor 10^6?
The current convention defines current as the motion of positive charge. In a metallic conductor, what does current flow actually consist of?
What is the key characteristic of an 'open circuit'?
A voltage-controlled voltage source (VCVS) has a gain of 5. If the controlling voltage, vx, is 2V, what is the output voltage of the source?
In the SI system, what is the fundamental unit of charge and how is it defined in terms of the ampere?
A resistor of 4.7 MOhm has a current of 3 nA flowing through it. What is the power absorbed by the resistor?
What is the main advantage of representing an AC household outlet as an ideal independent voltage source?
An electric vehicle motor is rated at 40 hp. If it runs continuously at maximum output for 3 hours, how much electrical energy is consumed in SI units with engineering notation?
The definition of current is i = dq/dt. What is the corresponding integral form to find the total charge q(t) that has passed a point, given an initial charge q(t0)?
A circuit element has -3.8 V across it (positive reference on top) and a current of -1.75 A flowing into the bottom terminal. What is the power being absorbed by the element?
What is the primary characteristic of a 'linear' resistor?
A dependent source in a circuit has its value given by the expression g*vx, where g has units of A/V. What type of source is this?
Why must a current definition always be associated with an arrow on a circuit diagram?
If a resistor has a conductance of 200 mS, what is its resistance?
Which of the following describes an active network?
A 100 watt light bulb is left on for 24 hours. How much energy has it consumed in Joules?
How many individual charges (electrons) does 1 coulomb of negative charge represent?
A dc power link has an operating voltage of 500 kV and a capacity of 600 MW. What is the maximum dc current flow?
In the circuit of Fig. 2.19a, if the controlling voltage v2 is 3V, what is the voltage vL across the dependent source?
A current is described as a 'direct current' or dc. What does this mean?
A circuit element is absorbing -56 W of power. Which statement is equivalent?
A 24 AWG soft copper wire is 500 ft long. If the resistance is 25.7 Ohms per 1000 ft, what is the resistance of this wire?
What is the primary trade-off when choosing a wire gauge for an application?