Physics questions and answers

Physics Questions and Answers

If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.

3,252.

Magnetic flux density is defined as the

A.

total number of magnetic lines of force surrounding a magnet

B.

number of magnetic lines of force per unit area normal to the magnetic field

C.

strength of the magnetic field surrounding a current-carrying conductor

D.

magnetic force exerted on a unit magnetic pole

Correct answer is B

No explanation has been provided for this answer.

3,253.

A resistance wire of length 2 m and of uniform cross-sectional area 5.0 x 10-7 m2 has a resistance of 2.2 Ω Calculate its resistivity

A.

1.8 x 10-7Ωm

B.

5.5 x 10-7Ωm

C.

1.8 x 10-7Ωm

D.

5.8 x 107Ωm

Correct answer is B

No explanation has been provided for this answer.

3,254.

The parts of a bar magnet at which the magnetic effect is strongest are called the

A.

poles

B.

neutral points

C.

magnetic declinations

D.

magnetic meridians

Correct answer is A

No explanation has been provided for this answer.

3,255.

Using the diagram above, calculate the effective capacitance of the circuit

A.

1.56μf

B.

3.00μF

C.

3.71μF

D.

9.00μF

Correct answer is D

No explanation has been provided for this answer.