The amount of current in a circuit depends on _______.

A. the electrical resistance of the circuit
B. the voltage across the circuit
C. both of these answers
D. neither of these answers


Ans: C. both of these answers

Physics & Space Science

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The quantity Z in the expression must be

A. always greater than 1. B. always less than 1. C. It could be either greater than or less than 1.

Physics & Space Science

A plane stress element on a bar in uniaxial stress has a tensile stress of ?? 5 78 MPa (see fig.). The maximum shear stress in the bar is approximately:


(A) 29 MPa
(B) 37 MPa
(C) 50 MPa
(D) 59 MPa

Physics & Space Science

Quantum theory was developed

A) almost in its entirety by Erwin Schroedinger. B) almost in its entirety by Max Planck. C) almost in its entirety by Albert Einstein. D) by Planck, Schroedinger, Einstein, and many other scientists. E) in its entirety by Planck, Schroedinger, and Einstein.

Physics & Space Science

A 0.20-m-long metal rod has a radius of 3.0 cm and a resistance of 2.5 × 10^?5 ?. What is the resistivity of the metal?

a. 1.1E–8 ??m b. 3.5E–7 ??m c. 1.0E–8 ??m d. 1.8E–8 ??m e. 1.2E–7 ??m

Physics & Space Science