Two students perform the experiments on series and parallel combinations of two given resistors R 1 and R 2 and plot the following V - I graphs. Which of the graphs is (are) correctly labelled in terms of the words 'series' and parallel justify your answer.

Resistance R s in series combination is more than the resistance R p in parallel combination of two given resistors R 1 and R 2 . The slope of V - I graph represents the resistance and slope of series combination is greater therefore, graph is correctly labelled. The slope of I - V graph = 1 R and slope of series combination is less than the parallel combination hence second graph is also correctly labelled.

E M B I B E

Science Part-I NEW ERA PHYSICS Textbook for Class X>Chapter 1 - Electricity>Test Your Self Exercise 2>Q 2

MEDIUM

10th CBSE

IMPORTANT

Earn 100

An ammeter can measure current up to $500 mA$ . There are 20 equal divisions between $0$ and $100 A$ marks on its scale. During an experiment to determine the equivalent resistance of the two resistors joined in parallel a student observes ammeter’s pointer at 3rd graduation mark after zero when the key is off and the pointer at the 17th graduation mark after $200 mA$ when the key is inserted into the plug. The correct value of the current flowing in the circuit is.

Important Questions on Electricity

MEDIUM

10th CBSE

IMPORTANT

Science Part-I NEW ERA PHYSICS Textbook for Class X>Chapter 1 - Electricity>Test Your Self Exercise 2>Q 3

What are the main advantages of parallel circuits in domestic wiring?

MEDIUM

10th CBSE

IMPORTANT

Science Part-I NEW ERA PHYSICS Textbook for Class X>Chapter 1 - Electricity>Test Your Self Exercise 2>Q 4

Define kilowatt-hour. How is it related to joule?

MEDIUM

10th CBSE

IMPORTANT

Science Part-I NEW ERA PHYSICS Textbook for Class X>Chapter 1 - Electricity>Test Your Self Exercise 2>Q 5

Calculate the resistance of a bulb rated

100 W

,

250 V

.

MEDIUM

10th CBSE

IMPORTANT

Science Part-I NEW ERA PHYSICS Textbook for Class X>Chapter 1 - Electricity>Test Your Self Exercise 2>Q 6

Calculate the equivalent resistance between the points $A$ and $B$ in the given figure.

Question Image

MEDIUM

10th CBSE

IMPORTANT

Science Part-I NEW ERA PHYSICS Textbook for Class X>Chapter 1 - Electricity>Test Your Self Exercise 2>Q 7

Calculate the energy released by a heater, which draws a current of

5 A

at

200 V

for

3

minutes.

MEDIUM

10th CBSE

IMPORTANT

Science Part-I NEW ERA PHYSICS Textbook for Class X>Chapter 1 - Electricity>HIGHER ORDER THINKING SKILLS (HOTS)>Q 1

A TV set picture tube shoots out a beam of electrons. The current due to this beam is

10 mA

. How many electrons will strike the TV screen every second?

HARD

10th CBSE

IMPORTANT

Science Part-I NEW ERA PHYSICS Textbook for Class X>Chapter 1 - Electricity>HIGHER ORDER THINKING SKILLS (HOTS)>Q 2

A cylindrical wire is stretched to increases its length by

10 %

. Calculate the percentage increase in resistance.

MEDIUM

10th CBSE

IMPORTANT

Science Part-I NEW ERA PHYSICS Textbook for Class X>Chapter 1 - Electricity>HIGHER ORDER THINKING SKILLS (HOTS)>Q 3

Two students perform the experiments on series and parallel combinations of two given resistors $R_{1}$ and $R_{2}$ and plot the following $V - I$ graphs.

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