A series LR circuit includes a 9.0 V battery, a resistance of 0.20 and an inductor. When the switch is closed, the circuit exhibits a time constant of 200 ms. What is the inductance of the circuit?

A. 42 mH
B. 15 mH
C. 32 mH
D. 40 mH
E. 22 mH


D. 40 mH

Physics & Space Science

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Structure 1 with member BC of length L/2 has force P1 applied at joint C. Structure 2 with member BC of length L has force P2 applied at C. Both structures have constant flexural rigidity EI. If the ratio of the applied forces P1/P2 5 5/2, the ratio of the joint B reactions RB1/RB2 is approximately:

(A) 1
(B) 5/4
(C) 3/2
(D) 2

Physics & Space Science

Using an orbit size of 8 kpc, and a period of 225 million years, the mass of our Galaxy is found to be closest to:

A) 106 solar masses. B) 108 solar masses. C) 1010 solar masses. D) 1011 solar masses. E) 1012 solar masses.

Physics & Space Science

A force F is exerted on an object of mass m through a distance d. A force twice as large (2F) is exerted on a mass 2m also through the distance d. Explain the relation between the amount of work done in the two cases

What will be an ideal response?

Physics & Space Science

The average size of a white dwarf is about the same size as the Earth

Indicate whether the statement is true or false

Physics & Space Science