Science Part-I NEW ERA PHYSICS Textbook for Class X>Chapter 1 - Electricity>PROBLEMS FOR PRACTICE>Q 10

HARD

10th CBSE

IMPORTANT

Earn 100

Two bulbs $A$ and $B$ are rated $100 W$ , $120 V$ and $10 W,$ $120 V$ respectively. They are connected in series across a $120 V$ source. Find the current in each bulb. Which bulb will consume more power?

Important Questions on Electricity

EASY

10th CBSE

IMPORTANT

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

A student sets up her circuit, for finding the equivalent resistance of two resistors $R_{1}$ and $R_{2}$ in series, in the manner as shown. She did not obtain the correct result in her experiment because of a mistake in her circuit. What mistake did she commit and what should be done to correct this mistake?

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 2

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.

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?