AP (Advanced Placement) Physics(B-C): Questions 682 - 685 of 920

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Question number: 682

» Magnetic Field & Electromagnetism

MCQ▾

Question

A coil having an axial length of and a radius of is pivoted in magnetic field having a flux density of . The current flowing through coil is . If the torque acting on the coil is , then how many number of turns of coil is there?

Choices

Choice (5) Response

a.

360

b.

250

c.

300

d.

180

e.

All of the above

Question number: 683

» Atomic & Nuclear Physics

MCQ▾

Question

How much amount of a radioactive isotope of atomic weight is necessary to provide a source of particles of millicuries strength? Consider half-life of this radioactive isotope is .

Choices

Choice (5) Response

a.

b.

c.

d.

e.

None of the above

Question number: 684

» Thermodynamics

MCQ▾

Question

An ideal gas is filled in a sealed and rigid cylinder. If the temperature increases, then the density of the ideal gas:

Choices

Choice (5) Response

a.

remains same

b.

decreases

c.

becomes zero

d.

increases

e.

All of the above

Question number: 685

» Electric Circuits

MCQ▾

Question

Circuit of three equivalent resistors

Circuit of Three Equivalent Resistors

Figure shows, circuit of three equivalent resistors.

In circuit diagram, combination of three equivalent resistors is connected with battery. The total current flowing through circuit is . If the internal resistance of battery and wires is negligible, then what is resistance of each resistor?

Choices

Choice (5) Response

a.

b.

c.

d.

e.

None of the above

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