Electricity Class 10 WS1

Question-1.Will current flow more easily through a thick wire or a thin wire of the same material, When connected to the same source? Why?

Question-2. Why are coils of electric toasters and electric irons made of an alloy rather

than a pure metal?

Question-3

On what factors does the resistance of a conductor depend?

Question-4

Draw a schematic diagram of a circuit consisting of a battery of four 2 V

cells, a 5 ohm resistor, an 8 ohm resistor and a 12 ohm resistor and a plug

key all connected in series.

Question-5

When a 12 V battery is connected across an unknown resistor, there is a

current of 2.5 mA in the circuit. Find the value of the resistance of the

resistor.

Question-6

State Ohm’s Law.

(Q.43)  How much current will an electric heater coil draw from a 220 volt line, if the resistance of the

heater coil is 40 ?  

(Q.7)  Calculate the number of electrons constituting one coulomb of charge.   ( 2 Marks )

(Q.8)  The combination of resistances shown below has equivalent resistance equal to 12 ohm, what is

the value of R?

(Q.9)  Calculate the amount of charge that would flow in 1 hour through the elements of

an electric bulb drawing a current of 0.4 A.   ( 2 Marks )

View Answer

(Q.10)  What is the power of an electric lamp, if it draws 20 A current when connected to