Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEET 2018
Exam
NEET
Year
2018
Subject
Physics
Chapter
Current Electricity

NEET 2018 · Physics · Current Electricity

A battery consists of a variable number 'n' of identical cells...

A battery consists of a variable number 'n' of identical cells (having internal resistance 'r' each) which are connected in series. The terminals of the battery are short-circuited and the current II is measured. Which of the graphs shows the correct relationship between II and n?A battery consists of a variable number 'n' of identical cells (having internal resistance 'r' each) which areA battery consists of a variable number 'n' of identical cells (having internal resistance 'r' each) which areA battery consists of a variable number 'n' of identical cells (having internal resistance 'r' each) which areA battery consists of a variable number 'n' of identical cells (having internal resistance 'r' each) which areA battery consists of a variable number 'n' of identical cells (having internal resistance 'r' each) which are

Options

  1. AIf the number of five digit numbers with distinct digits and 2 at the 10 ^ th place is 336k , then k is equal to:
  2. BIf the number of five digit numbers with distinct digits and 2 at the 10 ^ th place is 336k , then k is equal to:
  3. CIf the number of five digit numbers with distinct digits and 2 at the 10 ^ th place is 336k , then k is equal to:
  4. DIf the number of five digit numbers with distinct digits and 2 at the 10 ^ th place is 336k , then k is equal to:

Correct answer

D. If the number of five digit numbers with distinct digits and 2 at the 10 ^ th place is 336k , then k is equal to:

Step-by-step solution

A battery consists of a variable number 'n' of identical cells (having internal resistance 'r' each) which are

In series, εnet=nε{ε}_{net} = nε

and rnet=nr{r}_{net} = nr

current in circuit
I=nεnr=εr=I = \dfrac{nε}{nr} = \dfrac{ε}{r} = constant.

⇒I⇒ I independent of nn

Practice Current Electricity on Quantrex Academy →

More from Current Electricity

A potentiometer wire of 400\ cm length has a resistance of 20\ Ω . It is connected in… MHT CET Medical 2026In the following figure current I equal to MHT CET Medical 2026The range of voltmeter is 10\ V and its resistance is 50\ Ω . To convert it to a… MHT CET Medical 2026When a galvanometer is shunted with a 2\ Ω resistance, the deflection is reduced to… MHT CET Medical 2026A galvanometer can be converted into a voltmeter of certain range by connecting a… MHT CET Medical 2026A resistance is to be measured using a meter bridge; the student chooses the standard… MHT CET Medical 2026Which of the following statements is FALSE? A. In a balanced Wheatstone bridge, if the… MHT CET Medical 2026A potentiometer wire has length 4 m and resistance 8\ Ω . The resistance that must be… MHT CET Medical 2026 Full Current Electricity list All NEET PYQs