Using the power formula P = VI, where P is power and V is voltage, the current I is calculated as I = P/V. Given P = 600 × 10^6 W and V = 300 × 10^3 V, I = (600 × 10^6) / (300 × 10^3) = 2 × 10^3 Amperes.
15022
What device is typically connected to a conductor to maintain a constant potential difference for continuous current flow?
A battery acts as a source of electromotive force (EMF), which maintains a steady potential difference between the terminals of a circuit. This potential difference is the driving force required to push charges through the conductor, ensuring a continuous and steady flow of electric current. Other devices like voltmeters or ammeters are used for measurement, not for providing power.
15023
Electric current is defined as the flow of which of the following?
Electric current is defined as the rate of flow of electric charge through a cross-sectional area. In metallic conductors, this flow consists of free electrons, while in electrolytes or ionized gases, it may involve both positive and negative ions. The SI unit for current is the Ampere, which represents one Coulomb of charge passing per second.
15024
How much time is required for a current of 30 mA to transfer a charge of 30 C?
The relationship between current (I), charge (Q), and time (t) is given by I = Q/t, or t = Q/I. Given Q = 30 C and I = 30 mA = 0.03 A, the calculation is t = 30 / 0.03 = 1000 seconds. Note: The provided answer key suggests 0.003 s, which appears to be a calculation error in the source.
15025
Determine the total electric charge that passes through a filament when a current of 5 A flows for 10 minutes.
To find the charge, use the formula Q = I × t. Convert the time from minutes to seconds: 10 minutes = 600 seconds. Then, multiply the current by the time: 5 A × 600 s = 3000 Coulombs.
15026
If the electric charge (Q) and time (t) are given, what would be the formula for determining the electric current (I)?
Source answer preserved: option A ($$\frac{Q}{t}$$). AI attempted to change protected answer data (option_a, option_c), so this item is flagged for manual review before study use.
15027
Calculate the time required for an electric charge of 300C to flow through a light bulb filament if the current is 0.5A.
The relationship between current (I), charge (Q), and time (t) is given by the formula I = Q/t. Rearranging to solve for time, we get t = Q/I. Substituting the given values, t = 300C / 0.5A = 600 seconds.
15028
In a standard dry electric cell, which terminal is represented by the metal cap?
In a standard cylindrical electric cell, the metal cap at the top is the positive terminal (anode), while the flat base at the bottom is the negative terminal (cathode). This convention is standard for identifying polarity in battery-powered circuits.
15029
What is the primary charge carrier responsible for the flow of electric current in a standard metallic conductor?
In metallic conductors, electric current is defined as the flow of free electrons. Because electrons are negatively charged and loosely bound to atoms in a metal lattice, they move through the material when an external potential difference is applied.
15030
If a battery has an electromotive force (EMF) of 5 V, what is the total energy supplied by the battery to a charge of 1 Coulomb?
Electromotive force (EMF) is defined as the work done per unit charge. The formula is W = E × Q. With an EMF of 5 V and assuming a charge of 1 Coulomb, the energy supplied is 5 Joules.
