A 200-ω resistor is rated at 1/4 w. What is the maximum voltage that can safely be connected across it?

7.07volts

Explanation:

Power generated by a load or resistor in an electric circuit is represented as P = IV... (1) where;

P is the power measured in watts (W)

I is the current flowing through the resistor in amperes

V is the maximum voltage passed across the circuit in volts

According to ohms law V = IR; I = V/R... (2)

Substituting equation 2 into 1

P = IV

P = V/R×V

P = V²/R

Given the power rating = 1/4w

Resistor = 200ohms

V² = PR

V² = 200×1/4

V² = 50

V = √50

V = 7.07volts

Therefore the maximum voltage that can safely be connected across it is 7.07Volts.

answer: the exterior temperature of commercial jet planes as they leave the stratosphere and return to the ground increases steadily.

explanation:

the lower most layer of atmosphere is troposphere which extends from 0 to 12 km above the surface of the earth. the temperature initially decreases as distance is increased from the earth's surface. commercial jets fly in lower part of the stratosphere. the stratosphere extends upto 50 km. the temperature in stratosphere starts rising again due to presence of ozone which traps the uv rays.

thus, when the planes leave the stratosphere and return to the ground, the exterior temperature increases steadily.

electrical power