5 Minute Tech Quiz

The correct answer is a. Current * Resistance. This is because voltage is directly proportional to both current and resistance. According to Ohm's Law, voltage (V) is equal to the product of current (I) and resistance (R), V = I * R. Therefore, to find the voltage, we need to multiply the current and resistance values together.

An ion is formed when an atom gains or loses electrons, resulting in an unequal number of electrons and protons. This imbalance creates a positive or negative charge, making the atom an ion. Therefore, the statement that an ion is an atom in which the number of electrons and protons are not equal is true.

Given the values of current (I) and resistance (R), we can use Ohm's Law (E = I * R) to calculate the voltage (E). In this case, the current is 6 amps and the resistance is 2 ohms. Therefore, E = 6 * 2 = 12 volts.

Microwaves do not require air as a medium to travel. They can travel through a vacuum, which means they can travel in space where there is no air. Therefore, the statement that microwaves require air as a medium is false.

Photoelectric beams are active sensors because they emit a beam of light and detect if the beam is interrupted or blocked. They actively send out a signal and actively receive the signal back to determine if there is any obstruction. Passive sensors, on the other hand, rely on detecting changes in the environment without actively emitting any signal. Dormant and useless are not applicable terms for describing photoelectric beams.

Resistors are not typically used to supervise a circuit. They are used to restrict current flow in a circuit, adjust for over or undersized wiring, or in some cases, to identify where the wire runs. Therefore, the given answer is not correct.

The colors of the resistor bands are used to determine the resistance value. In this case, the first band is orange, which represents the digit 3. The second band is also orange, representing the digit 3 again. The third band is black, which represents a multiplier of 1. Therefore, the resistor has a value of 33 ohms.

The phenomenon described in the question is known as the Doppler Shift. The Doppler Shift occurs when there is a change in frequency or pitch of a sound wave due to the relative motion between the source of the sound and the observer. In this case, as the train approaches the observer, the sound waves are compressed, resulting in a higher frequency and a louder sound. As the train passes by and moves away, the sound waves are stretched, resulting in a lower frequency and a quieter sound. Therefore, the correct answer is c. Doppler Shift.

Glass does not reflect or absorb microwave energy. Instead, it allows microwaves to pass through it. This is why microwave ovens use glass doors, so that you can see inside while the microwaves stay contained. Therefore, the statement that glass reflects but does not absorb microwave energy is incorrect.

The sum of the figures given is 0.75 amps + 0.2 amps + 1.5 amps + 1 amp, which equals 3.45 amps.

A material with few free electrons is called a conductor. Conductors are materials that allow the flow of electric current due to the presence of free electrons that can move easily through the material. These materials typically have a high electrical conductivity and are used in applications where the transfer of electricity is desired, such as in wires and cables.

A transducer is a device that converts energy from one form to another. It can take different forms depending on the type of energy being converted. For example, a microphone is a transducer that converts sound energy into electrical energy, while a solar panel is a transducer that converts sunlight into electrical energy. Therefore, a transducer is the correct answer as it encompasses the broad concept of energy conversion in various forms.

The correct answer is d. R1*R2/R1+R2. This formula is used to calculate the total resistance of a circuit with two parallel resistors. In a parallel circuit, the total resistance is given by the reciprocal of the sum of the reciprocals of the individual resistances. The formula R1*R2/R1+R2 simplifies this calculation by multiplying the two resistances and dividing the result by their sum.

UL requires that a foil pattern start at no more than 4 inches from the frame.

The flow of energy through materials and devices is referred to as electricity. Electricity is the movement of electrically charged particles, such as electrons, through a conductor. It is the transfer of energy from one point to another, typically in the form of electrical power.