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

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

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

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

 5) In a concave mirror, an object placed __________ will result in a virtual image. between the focal point and mirror between the focal point and twice the distance of the focal point 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? concave plane none of these convex

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

 8) The image from a convex mirror will _________. always be real always be projected 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 __________ coulomb (C) volts (V) tesla (T) ampere (A)

 11) By convention, the charge on a glass rod that has been rubbed with silk is called positive negative 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 flow current will not flow cannot say

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

 14) The net charge flowing through a cross section of a conductor in unit time is known as______ ampere electric potential 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 = Q / W W = V / Q V = W × Q

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

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

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

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