Purchase Solution

Electronics problems involving capacitor, resistor etc.

Not what you're looking for?

Ask Custom Question

1) A tungsten filament has a resistance of 3 OMP at 20 degrees. When connected
to a 100V power supply a current of 6.0A passes through a filament. If the
filament is connected to the same power supply when it is at 2000 degrees,
what will be the current through the filament and its power loss?

2) A battery whose emf is 12V is used to operate a device that draws 6.5A. When
the device is operating the battery voltage is checked and found to be 8.2V.
What will be the battery voltage be when it is connected to a device drawing

3) An electric car is designed to run off a bank of 12V batteries with total
energy storage 2*10^7 j. If the electric motor draws 800W in moving the car at
a speed of 20m/s, how far will the car go before it runs out of "juice"?

4) In the following circuit, what is the current through R1 at T=1 second after
the switch is closed? How long does it take the capacitor to be 95% fully

The diagram:
R1 and R2 are parallel to each other. R1=2M* omg R2=6M* omg (M is mega, not
A capacitor is connected in the circuit. C=2uF

Purchase this Solution

Solution Summary

More than 300 words solution. Easy to understand explanations for all 4 problems.

Solution Preview

Please see the attached file.

(1)Ans: Tungsten like most other metals has a positive temperature coefficient of resistance of about 4.5 x 10 -3 K-1
It's resistance is given by, R = R0[1 + (T - ...

Purchase this Solution

Free BrainMass Quizzes
Introduction to Nanotechnology/Nanomaterials

This quiz is for any area of science. Test yourself to see what knowledge of nanotechnology you have. This content will also make you familiar with basic concepts of nanotechnology.

The Moon

Test your knowledge of moon phases and movement.

Basic Physics

This quiz will test your knowledge about basic Physics.

Intro to the Physics Waves

Some short-answer questions involving the basic vocabulary of string, sound, and water waves.

Classical Mechanics

This quiz is designed to test and improve your knowledge on Classical Mechanics.