WAEC Physics Past Questions & Answers - Page 242

1,207.

In a uniform electric field, the magnitude of the force on a charge of 0.2 C is 4N. Calculate the electric field intensity

A.

20 N C-1

B.

8 N C-1

C.

5 N C-1

D.

2 N C-1

Correct answer is A

No explanation has been provided for this answer.

1,209.

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.

1,210.

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.