Physics
 1) The line perpendicular to the reflective surface is the .......... line of refraction normal line of incidence line of reflection

 2) Your image in a bathroom mirror results from_____ specular reflection specular refraction diffuse refraction diffuse reflection

 3) How does light normally travel? in a straight line in concentric circles in a curved line always towards a dark area

 4) What if you have an object 2.0 m from the concave mirror, and the image is 4.0 m from the mirror? 4.0 m 1.3 m 2.0 m 0.67 m

 5) In a concave mirror, an object placed __________ will result in a virtual image. twice the distance of the focal point between the focal point and twice the distance of the focal point past the focal point between the focal point and mirror

 6) Which type of mirror produces an image that is always erect, always the same height as the object, and always virtual? none of these convex concave plane

 7) __________ is located behind a convex mirror. The focal point A real image A ray The object

 8) The image from a convex mirror will _________. always be real never be virtual always be projected always be virtual

 9) Light travels fastest through which among the following materials? air diamond water glass

 10) The SI unit of electric charge is __________ tesla (T) ampere (A) volts (V) coulomb (C)

 11) By convention, the charge on a glass rod that has been rubbed with silk is called positive either positive or negative none of these negative

 12) Two charged bodies having equal potential are connected through a conducting wire, in this case current will flow, if a resistor is also connected current will not flow current will flow cannot say

 13) The potential difference between two terminals can be measured by _________ a rheostat an ohm-meter an ammeter. a voltmeter

 14) The net charge flowing through a cross section of a conductor in unit time is known as______ ampere resistance electric potential volt

 15) Which of the following correctly represents the relation among Charge (Q), Potential difference (V) and Work done (W) V = Q / W V = W × Q V = W / Q W = V / Q

 16) The voltmeter is always connected in _________ across the points between which the potential difference is to be measured. series parallel either series or parallel none of these

 17) How many electrons will be there in 1.6C charge? 1020 1018 1017 1019

 18) A galvanometer is used to measure amount of current flowing measure electric power of the circuit detect direction of current measure potential difference

 19) An electric fuse is based on ________ none of these the magnetic effect of the current the heating effect of the current the chemical effect of the current

 20) A ball is thrown upwards vertically. What is the velocity of the ball at its highest point? (Take g = 9.8 m/s2) 9.8 m/s 1 m/s 0 m/s cannot be determined since time is not given.

 21) An object of mass 20 kg moves with uniform acceleration from rest to a speed of 2m/s in 20 secs. On average how much power is generated in 20 seconds duration. 40 W 20 W 2 W 10 W

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