Question

In a circuit connect 4 volt of battery and resistance will be 4 OHM. find the current.
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Answer 1

Answer:

1Ampere

Explanation:

I=V/R i.e. I=4/4=1ampere

Answer 2

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. Option C is correct.