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

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

 3) How does light normally travel? in a straight line in a curved line in concentric circles 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? 2.0 m 1.3 m 4.0 m 0.67 m

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

 6) Which type of mirror produces an image that is always erect, always the same height as the object, and always virtual? convex concave none of these 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 projected always be real always be virtual never be virtual

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

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

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

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

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

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

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

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

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

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

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

 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 2 W 10 W 20 W

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