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SHAHIDAN BIN SIDEK D20112052269

PENDIDIKAN JARAK JAUH

UNIVERSITI PENDIDIKAN SULTAN IDRIS

TUGASAN 2

SFU3023

GENERAL PHYSICS IITUTOR E-LEARNING : DR. ROSZAIRI BIN HARON

GROUP UPSI01 (A142PJJ)

NAME: SHAHIDAN BIN SIDEK

MATRIX NO.: D20112052269

DATE OF SUBMISSION : 18 MEI 2015

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Chapter 5: Electromagnetic Induction

1. What is the difference between magnetic flux and magnetic field?

2. The magnetic flux through a coil of wire containing two loops changes from

60Wb to 40Wb in 0.5 s. What is the emf induced in the coil?

3. The north pole of the magnet in figure below is being inserted into the coil. In

which direction is the induced current flowing through the resistor R?

The answer should be: Right to left OR left to right.

4. If the solenoid in figure below is being pulled away from the loop shown, in whatdirection is the induced current in the loop?

The answer should be: Clockwise OR Counterclockwise.

5. A transformer is designed to change 150 V into 5,000 V, and there are 200 turns in

the primary coil. How many turns are in the secondary coil?

6. A transformer has 400 turns in the primary coil and 250 in the secondary coil.a) What kind of transformer is this?

b) By what factor does it change the voltage? [means the ratio Vs/Vp]

c) By what factor does it change the current? [means the ratioIs/Ip]

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SHAHIDAN BIN SIDEK D20112052269

Chapter 6: Geometrical Optics (mirrors and lenses)

7. Your eye looks into an aquarium and views a fish inside. One ray of light that

emerges from the tank is shown in figure below, as well as the apparent position of

the fish. In the drawing, indicate the approximate position of the actual fish. Brieflyjustify your answer.

8. How far from a concave mirror (radius 35cm) must an object be placed if its image

is to be at infinity?

9. You are standing 2 m from a convex mirror in a store. You estimate the height ofyour image to be half of your actual height. Estimate the radius of curvature of the

mirror.

10. The speed of light in ice is 5.5 108m/s. What is the index of refraction of ice?

index of refraction, =Speed of light in vacuum,

speed of light in ice,

= 3.00 108/,

=3.0 108

5.5 108

=.

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SHAHIDAN BIN SIDEK D20112052269

11. A flashlight beam strikes the surface of a pane of glass (n =1.5) at a 40 angle to

the normal. What is the angle of refraction?

=sin 40

sin = 1.5

sin =sin 40

1.5

=0.6428

1.5

= 0.4285

=.

12. A certain lens focuses light from an object 3.5 m away as an image 50 cm on the

other side of the lens. What type of lens is it and what is its focal length? Is the

image real or virtual?

The type of lens = convex lens

Object distance, do = 3.5 m = 350 cm

Image distance, di = 50 cm

Focal length,f:

1

+

1

=

1

1

350+

1

50=

1

1 + 7

350=

1

8350

= 1

=350

8=.

So the image is real.