Ask a Doubt
Request a call back

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

ICSE Class 10 Answered

plz solve this question from my board paper 2019
Asked by ramandeep.kaur | 05 Mar, 2019, 05:22: PM
Expert Answer
V = 3.3 V 
 
Internal resistance = 0.5 Ω
 
1. The resistance of circuit when key k is open
 
The resistance of 5 ohms and internal resistance of 0.5 ohms will be considered:
 
So, R = 5 + 0.5 = 5.5 Ω
 
2. The current drawn from the cell when key k is open
 
Current drawn will be 
 
I = V/R = 3.3/ 5.5  =0.6 A 
 
3. The resistance of circuit when key k is closed 
 
Resistors in series are 2 ohms and 3 ohms
 
So, Rs  = 2 + 3 = 5 ohms 
 
Resistance in parallel,
 
1 over R subscript p space equals space 1 over R subscript 1 plus 1 over R subscript 2 space equals space 1 fifth plus 1 fifth space equals space 2 over 5 rightwards double arrow space R subscript p space end subscript space equals space 2.5 space capital omega space R space equals space 2.5 space plus 0.5 space equals space 3 space capital omega
 
4. The current in the circuit when key k is closed 
 
Total current = Total voltage/ Resistance = 3.3/3 = 1.1 Ω
Answered by Shiwani Sawant | 05 Mar, 2019, 06:25: PM

Application Videos

Concept Videos

Multiple Choice Questions Practice Test Subjective Questions Webinar Subjective Questions Pre Board Assessment
Answered Unanswered My Questions My Answers
ICSE 10 - Physics
Find the magnitude of current through the 4\OmegaΩ resistor in the circuit shown. 
Asked by Om | 28 Jun, 2022, 10:04: PM
ANSWERED BY EXPERT
ICSE 10 - Physics
Find the resistance between A and B.
Asked by divyankakumari0607 | 30 Dec, 2021, 10:38: AM
ANSWERED BY EXPERT
ICSE 10 - Physics
calculate the resistance of 1km long copper wire of radius 1mm
Asked by nutanpf | 27 Mar, 2021, 04:41: PM
ANSWERED BY EXPERT
ICSE 10 - Physics
what is ohm law ?  
Asked by uniclub8 | 13 May, 2020, 11:11: AM
ANSWERED BY EXPERT
ICSE 10 - Physics
exercise 8a numerical 12
Asked by nilesh.dhote74 | 10 May, 2020, 10:31: PM
ANSWERED BY EXPERT
ICSE 10 - Physics
exercise 8A numerical 10
Asked by nilesh.dhote74 | 10 May, 2020, 10:22: PM
ANSWERED BY EXPERT
ICSE 10 - Physics
exercise 8a numerical 8
Asked by nilesh.dhote74 | 10 May, 2020, 10:14: PM
ANSWERED BY EXPERT
ICSE 10 - Physics
exercise 8a numerical 8
Asked by nilesh.dhote74 | 10 May, 2020, 10:04: PM
ANSWERED BY EXPERT
ICSE 10 - Physics
I had a query in th following question: A given wire of resistece is stretched to double its length. What will be its new resistance? How come the answer is 4 ?
Asked by rohanraval2 | 28 Mar, 2020, 09:22: PM
ANSWERED BY EXPERT
ICSE 10 - Physics
plz solve this question from my board paper 2019
Asked by ramandeep.kaur | 05 Mar, 2019, 05:22: PM
ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt