Question

Multiple Choice Questions

• Electric fuse is connected with:

• Live wire

• neutral wire

• earthing

• parallel to the line wire


• On which of the following no " plus" or "minus" sign is

marked

• a battery

• an ammeter

• a voltameter

• a resistor


• A current of 0.5A is drawn by a filament of an electric bulb

for 10 minutes. The amount of electric charge flowing

through the bulb is

• 400c

• 500C

• 300C

• 600c


• Two charged bodies having equal potential are connected

through a conducting wire, in this case
• current will flow

• current will not flow

• cannot say

• current will flow if a resistor is also connected.


According to ohms law,

• The resistance increases with the increases in current.

• The resistance increases with the increases in voltage.

• The current increases with the increases in voltage.

• The resistance and current both increases wiyh the increases in

voltage.


The rating of a fuse connected in the lighting circuit is

__________.

• 15 A

• 5 A

• 0

• 10 A


• An electric fan rated 50 W operates 20 hours in a day. What
is the cost of the energy to operate it for 30 days at Rs. 2 per
kWh?

• Rs. 50

• Rs. 60

• Rs. 70
• Rs. 80


A 625 mm long metallic wire offers 4 ohms resistance. If

the resistivity of a metal is 4.8×10−7 ohm metre, then

calculate the area of the cross section of the wire.

• 0.25×10−5m2

• 0.50×10−3m2

• 0.75×10−7m2

• 1.00×10−4m


A wire of resistance R is doubled by stretching. What will

be the resistance of half of this stretched wire?

• (R/2)


• R

• 2R

• 4R​

Answer 1

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