Reference no: EM13583897

1. A beam of light traveling in air is incident on a transparent plastic at an angle of incidence of 50^o. The angle of refraction is 35^o. What is the index of refraction of the plastic?

A) 1.56

B) 1.34

C) 1.67

D) 1.43

2. A long, straight wire carries a current of 2.5 A. Find the magnitude of the magnetic field 25 cm from the wire.

3. If a current is flowing with a value of 5.9 A, how much electron charge passes any single point in 25 seconds?

A) 2.3 x 10²⁰ e

B) 1.9 x 10²⁰ e

C) 9.2 x 10²⁰ e

D) 1.5 x 10²⁰ e

4. Estimate the average power output of the Sun, given that about 1350 W/m² reaches the upper atmosphere of the Earth. The distance from the Sun to the Earth is 1.5 × 10¹¹ m.

A) 4 × 10²⁶ W

B) 3 × 10²⁶ W

C) 2 × 10²⁶ W

D) 1 × 10²⁶ W

5. Starting from rest, a proton falls through a potential difference of 2700 V. What speed does it acquire?

A) 3.6 × 10⁵ m/s

B) 2.4 × 10⁵ m/s

C) 7.2 × 10⁵ m/s

D) 4.8 × 10⁵ m/s

8. If the force between two charges increases by a factor of 16 because the charges are moved closer together, how much closer are they moved?

A) 4

B) 2

C) 8

D) 16

9. A concave mirror with a radius of 30 cm creates a real image 40 cm from the mirror. What is the object distance?

A) 24 cm

B) 70 cm

C) 5.0 cm

D) 10 cm

10. A flux of 4.0 × 10^-5Wb is maintained through a coil for 0.50 s. What emf is induced in this coil by this flux?

A) 2.0 x 10^-5 V

B) No emf is induced in this coil.

C) 8.0 x 10^-5 V

D) 4.0 x 10^-5 V