Question

A 2 ohm resistor is connected in series with a circuit which conduct for current then the current will

Answer 1

Answer:

Step 1: Find the equivalent resistance of the Circuit.

Given: Two resistors R

1

& R

2

are connected in series.

So, equivalent resistance can be given as:

R

net

= R

1

+ R

2

R

net

= 2 + 4= 6Ω

Step 2 : Find the current through 4Ω resistor

Since both resistors are connected in series so current through

each resistor is same as the current through the circuit.

Current=

Net resistance

P.D.

I=

6

6

=1A

Step 3: Heat dissipated through 4Ω resistor can be given as :

H=I

2

Rt

where, H= Heat dissipated, R= Resistance and t= time in seconds

So, H=1

2

×4×5=20J

Final Step : Heat dissipated through 4Ω resistor in 5 sec is 20 J.