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

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

 3) How does light normally travel? in a curved line in a straight 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? 1.3 m 2.0 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 none of these convex concave

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

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

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

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

 11) By convention, the charge on a glass rod that has been rubbed with silk is called negative positive none of these either positive or 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 cannot say current will flow

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

 14) The net charge flowing through a cross section of a conductor in unit time is known as______ resistance ampere 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 either series or parallel parallel none of these

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

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

 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. 2 W 10 W 40 W 20 W

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