Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 10 Answered

Study the VI graph for a resistor as shown in the figure and prepare a table showing the values of I (in amperes) corresponding to four different values of V (in volts). Find the value of current for V = 10 volts. How can we determine the resistance of the resistor from this graph?
question image
Asked by harjot.arshleen | 21 May, 2021, 06:48: PM
answered-by-expert Expert Answer
Graph shows the relation between Voltage and current is linear.  Voltage is directly proportional to Current .
 
Let us assume a relation,   V = k I  ..........................(1)
 
where V is voltage , I is current and k is constant .
 
From graph , we get voltage V = 4 Volt when current I is 2 A .
 
By substituting these voltage and current in eqn.(1) , we get k = 2
 
Hence relation between Voltage and current ,  V =  2 × I     or    I  = 0.5 V  ...........................(2)
 
Following table shows current for different voltage
 
Voltage V ( Volt )  Current I ( A)
2 1
4 2
6 3
8 4
10 5

 

 
 
 
 
 
 
 
From table we see that at voltage 10 V ,  current I = 5 A
 
Resistance = Voltage / Current
 
From eqn.(2) , we get , Resistance = V / I = 2 Ω
Answered by Thiyagarajan K | 21 May, 2021, 08:22: PM

Application Videos

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 10 - Physics
write ohm's law for electric circuit. Also write the necessary formula for this .
Asked by khajannirwan | 27 Feb, 2024, 10:20: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
The resistance of a resistor is kept constant and the potential difference across its two ends is decreased to half of its former value.State the change that will occur in the current through it.
Asked by prassanna.j | 03 Sep, 2023, 12:13: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
What is the basic principle of Ohm's law?
Asked by sr558079 | 27 May, 2022, 01:40: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
what is resistivity
Asked by alka08156 | 17 Jul, 2021, 07:27: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
photo attached 
question image
Asked by amaarisa | 13 Jul, 2021, 09:36: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
explain ohm s law
Asked by rameshsanjaay3 | 08 Jun, 2021, 04:07: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
An electric iron has a rating of 750w,220v, calculate the current flowing through it and its resistance when in use
Asked by praveengupta2919.9 | 31 May, 2021, 02:53: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
Study the VI graph for a resistor as shown in the figure and prepare a table showing the values of I (in amperes) corresponding to four different values of V (in volts). Find the value of current for V = 10 volts. How can we determine the resistance of the resistor from this graph?
question image
Asked by harjot.arshleen | 21 May, 2021, 06:48: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
what is the unit of resistivity?
Asked by bobyison | 02 May, 2021, 06:35: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
a potential difference of 10 volt is needed to make a current of 0.02 impair for flow through a wire. what potential difference is needed to make a current of 250 mili ampere flows through the same wire
Asked by kritikabrahma23 | 13 Apr, 2021, 07:22: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×