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

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

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

 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 0.67 m 4.0 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? plane convex none of these concave

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

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

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

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

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

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

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

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

 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. series none of these either series or parallel parallel

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

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

 19) An electric fuse is based on ________ the magnetic effect of the current the heating effect of the current the chemical 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. 20 W 40 W 2 W 10 W

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