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Problem Number:

Problems with solutions

I.D Level Problem Problem Topic
527 High school The household circuits are wired in

a. series

b. parallel

c. both series and parallel

d. neither series nor parallel

. . . continues
Solution:
(b) parallel 		Current & Electricity
528 High school The magnetic pole of the Earth nearest the geographic North Pole corresponds to which of the following ?

a. a magnetic north pole

b. a magnetic south pole

c. a magnetic artic pole

d. a magnetic antarctic pole

. . . continues
Solution:
(b) a magnetic south pole 		Current & Electricity
529 High school The force on a charged particle created by its motion in a magnetic field is maximum at what angle between the particle velocity and field ?

a. zero

b. 180 degree

c. 90 degree

d. 45 degree

. . . continues
Click to Purchase Solution		 Current & Electricity
530 High school Assume that a uniform magnetic field is directed into this page . If an electron is released with an initial velocity directed from the bottom edge to the top edge of the page, which of the following describes the direction of the resultant force acting on the electron ?

a. out of the page

b. to the right

c. to the le . . . continues
Click to Purchase Solution

 Current & Electricity
531 High school A proton moving at a speed of 3.8 x 106 m/s cuts across the lines of a magnetic field at an angle of 70 degree. The strength of the field is 0.25 x 10-4 T. What is the magnitude of the force acting on the proton ? (qp = 1.6 x 10 – 19C)

a. 5.1 x 10-18 N

b. 9.0 x 10-18 N

c. 1.4 x 10 -17 N

d. 2.3 x 10-17 N

. . . continues
Click to Purchase Solution		 Current & Electricity
532 High school An electron moves through a region of crossed electric and magnetic field . The electric field E = 2000 V/m and is directed straight down . The magnetic field B = 0.80 T and is directed to the left . For what velocity v of the electron into the paper will the electric force exactly cancel the magnetic force?

a. 2500 m/s

b. 4000 m/s

. . . continues
Click to Purchase Solution		 Current & Electricity
533 High school A copper wire of length 25 cm is in a magnetic field of 0.20 T . If it has a mass of 10 g . What is the minimum current through the wire that would cause a magnetic force equal to its weight ?

a. 1.3 A

b. 1.5 A

c. 2.0 A

d. 4.9 A

. . . continues
Click to Purchase Solution		 Current & Electricity
534 High school Which of the following devices makes use of an electromagnet ?

A. loudspeaker

B. galvanometer

C. both A and B

D. None of the above

. . . continues
Solution:
(c) both A and B . 		Current & Electricity
535 High school A circular loop carrying a current of 1.0 A is oriented in a magnetic field of 0.35 T . The loop has an area of 0.24 m2 and is mounted on an axis , perpendicular to the magnetic field , which allows the loop to rotate . If the plane of the loop is oriented parallel to the field , What torque is created by the interaction of the loop curre . . . continues
Click to Purchase Solution		 Current & Electricity
536 High school A sine wave goes through 5 cycles in 10 micro seconds . What is it period ? . . . continues
Click to Purchase Solution		 Alternating Current
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