Physics, 05.10.2019 05:40 fatherbamboo

Two light bulbs, b1 and b2, are connected to a battery having appreciable internal resistance as shown in the figure. what happens to the brightness of bulb b1 when we close the switch s? . . a. the brightness of b1 does not change.. b. the brightness of b1 increases permanently.. c. the brightness of b1 decreases permanently.. d. the brightness of b1 increases temporarily but gradually decreases back to its original brightness.. e. the brightness of b1 decreases temporarily but gradually increases back to its original brightness.

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Answer from: raewalker23p4ibhy

When we close the switch S, what happens to the brightness of bulb B1 is the brightness of B1 decreases permanently.

Further explanation

Two light bulbs, B1 and B2, are connected to a battery having appreciable internal resistance as shown in the figure. What happens to the brightness of bulb B1 when we close the switch S?

a. The brightness of B1 does not change. b. The brightness of B1 increases permanently. c. The brightness of B1 decreases permanently. d. The brightness of B1 increases temporarily but gradually decreases back to its original brightness. e. The brightness of B1 decreases temporarily but gradually increases back to its original brightness.

Internal resistance is a practical electrical power source which is a linear electric circuit may be represented as an ideal voltage source in series with an impedance.

Internal resistance is measured in Ohms. The relationship between internal resistance (r) and emf (e) of cell s is

e = I (r + R)

Where, e = EMF i.e. electromotive force (Volts), I = current (A), R = Load resistance, and r is the internal resistance of cell measured in ohms.

When we close the switch S, what happens to the brightness of bulb B1 is the brightness of B1 decreases permanently. Whereas the brightness of B2 which is located near the switch is increases permanently.

Learn moreLearn more about light bulbs Learn more about brightness Learn more about battery Answer details

Grade: 9

Subject: physics

Chapter: electricity

Keywords: light bulbs, brightness, battery, physics, battery

Two light bulbs, b1 and b2, are connected to a battery having appreciable internal resistance as sho

Answer from: Quest

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.

Answer from: Quest

The best answer is (a) which is universal law is in effect at all times. it is constantly at play in everything we do and governs our lives. it is also important to note that universal law applies to not only everything on earth, but everything in the universe as well, which is another reason why it is in effect at all times.

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