Question

1. Three light bulb are connected in series with a 2 battery . Light Bulb 1 has a resistance of 2 Ohms , Lights bulb B has a resistance of 4 Ohms , and light bulb C has a resistance a resistance of 5 Ohms . Which light bulb will be the brightest ?

a) Light Bulb B

b) Light Bulb C

c) Light Bulb A

d) all have the same brightness , since the current in the same across each resistor.

2. If the Index of refraction in human skeletal muscle is 1.382. determine the speed of light in this medium.

a) 4.14x 18⁸ m/s

b) 2.17x 10⁸ m/s

c) 3 x 10 ^{​​​​​​​8} m/s

d) 1.38 x 10 ^{​​​​​​​8} m/s

3. Which wave has the largest frequency ?

a) All electromagnetic waves have the same frequency

b) x- rays

c) Radio waves

d) Infra-red

4. 2 μC positively charged particles are separated by 20 cm . Which law tells us that magnitude of the electric force on both particles will be the same but point in opposite directions ?

a) Newton's 1st Law

b) Newton's 2nd Law

c) newton's 3 law

d) Boyle's Law

5) Find the magnitude and direction of the electric field a point 5 cm below an object charged at - 2μC.

a) 720 N/C upward

b) 7.2 x 10⁶ N/C downward

c) 7.2 x 10⁶ N/C upward

d) 720 N/C downward

6. A 1- cm tall object is placed 25 cm in front of a covering lens .If the focal length is 10 c, , the image is   

a) real , upright and reduced

b) Irtual , inverted, and enlarged

c) Virtual , inverted .and reduced

d) real , inverted ,and reduced.

7. A runner is approaching an ice cream truck that is double parked. The ice cream truck is playing music at a frequency of 80 Hz . As the runner passes the ice cream truck , what could a possible answer   for the observed frequency ?

a) 80 Hz

b) 100 Hz

c) 60 Hz

8) Mary has a weight of 500 N on Earth . Determine her mass

a) 51 ks

b) 4,900 kg

c) 9,8 kg

d) 500 kg

Answer 1

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