Miscellaneous MCQ's 2

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a.       200 N/C

b.      2 N/C

c.       500 N/C

d.      5 N/C

      2.       A 40 watt 100 watt and 150 watt bulbs are connected in series across 220 volt supply. Which bulb will be brightest?

a.       150 watt

b.      100 watt

c.       40 watt

d.      All have same brightness

     3.       An ideal voltmeter has resistance

a.       finite

b.      Zero

c.       Constant

d.      Infinite

     4.       When the potential difference is applied across the conductor a directional flow of electrons sets up. The drift velocity of electrons _ with increasing temperature

a.       Increases

b.      Decreases

c.       Constant

d.      First increase then decreases

     5.       A 60 watt lamp operates at 50 % effiency. How much energy is dissipatedin 10 sec

                a.       200 J

                b.      300 J

                c.       600 J

                d.      None of these

     6.       A thermistor measures very low temperature near

a.       5 C

b.      5K

c.       10 C

d.      10k

     7.       Resistance offered by a meter cube of a material is known as

a.       Conductivity

b.      Resistivity

c.       Inductivity

d.      Conductance

      8.       An electrical motor has power 500 W the current drawn through it is 4A Find potential difference

a.       126 V

b.      127 V

c.       125 V

d.      120 V

       9.       One thousand watts of electric power is transmitted to a device by means of two wires, each of which has resistance of 2 oh. If  the resulting potential difference across the decive is 1000 volts the potential difference across the source supplying power is

a.       240 V

b.      100 V

c.       50 V

d.      200 V 

      10.   An electric charge on the surface of a hallow metal sphere is doubled, the electric field intensity at middle, inside the sphere

a.       Increases decreases

b.      Remains same

c.       Zero

     11.   Modern periodic table has number of groups and number of periods

a.       8,12

b.      12,7

c.       7,8

d.      8,7

      12.    F block elements are also called

a.       Outer transition element

b.      Inner trasition elements

c.       Alkaline earth elements

d.      Coinage earth metal

      13.   Which one of the following elements has the non variable oxidation state

a.       Berylium

b.      Chlorine

c.       Bromine

d.      Nitrogen

      14.   The elements of 1 A and II A group are obtained by the electrolysis of their molten

a.       Chlorides

b.      Carbonates

c.       Nitrate

d.      Oxides

      15.   Which element is the most electropositive in the periodic table

a.       Barium

b.      Calcium

c.       Potassium

d.      Cesium  

     16.   What are the products of the thermal decomposition of lithium nitrate?

a.       Lithiumnitride and oxygen

b.      Lithium oxide, nitrogen and oxygen

c.       Lithium osice, nitrogen dioxide and oxygen

a.        orange band

b.      Four black band

c.       One black band

d.      Red band 

      18.       If length of wire is doubled uniformly by stretching the wire then its resistance becomes

a.       Four times

b.      One fourth

c.       Two times

d.      Remains same 

      19.       The terminal potential difference is greater than emf of a cell when

a.       R = infinity

b.      Battery is supplying current

c.       R =  0

d.      When battery is being charged

      20.       The total flux through a closed surface depends upon

a.       Shape of closed surface

b.      Geometer of the closed surface

c.       Charge enclosed by the surface