# CBSE Worksheet for chapter-2 Electricity class 10

#### Worksheet For class 10

This page is prepared by the Academic team of Physics Wallah which consists of CBSE Board Worksheet for Class 10 Physics. Students of Class 10 Physics can get a free Worksheet for Class 10 Physics in PDF format prepared as per the newest syllabus and examination pattern in your schools.

Standard 10 students can practice questions and answers which are given here for Physics  in Grade 10 that will help them to improve their knowledge of all important chapters and their topics. Students can also download free pdf of Class 10 Physics Notes prepared by teachers and solve important problems provided here with solutions on daily basis to get more scores in school exams and tests.

If any students need to take the online test to check their concepts or undertstanding then they can visit Physics Quiz for Class 10.

## Summary

1. Heating effect of current – Electrical Energy, Electrical Power, Electric Fuse
2. House - Hold electrical circuits – Tree system and Ring system
3. Hazards of electricity, Earthing, Colour coding of wires
4. Galvanometer, Ammeter and Voltmeter

### Section 1 - Objective

Q1. Two heater wires of equal lengths are first connected in series and then in parallel with a battery. The ratio of heat produced in the two cases is:

• 2:1
• 1:2
• 4:1
• 1:4

Q2. How much electrical energy in kilowatt hour is consumed in operating ten, 50 watt bulbs for 10hours per day in a month of 30days?

1. 15
2. 150
3. 1500
4. 15000

Q3. The resistance of a conductor is reduced to half its initial value. In doing so the heating effects in the conductor will be:

1. Half
2. One-fourth
3. Four times
4. Double

Q4. Substances whose atoms have more free electrons are called:

1. Conductors
2. Insulators
3. Electrolytes
4. Semi-conductors

Q5. Two electric lamps whose coils having different resistances are connected in series with 210 V battery. Then:

1. Same amount of current flows through each lamp.
2. Same potential difference occurs in each lamp
3. Same power is consumed in each lamp
4. Same electrical energy is consumed by each lamp

Q6. Heating effect of a current carrying conductor is due to

1. Loss of kinetic energy of moving atoms
2. Loss of kinetic energy of moving electrons
3. Attraction between electrons and atoms
4. Repulsion between electrons and atoms

Q7. The wire having a red plastic covering is a:

1. Live wire
2. Neutral wire
3. Earth wire
4. None of these

Q8. A switch is always connected to the:

1. Earth wire
2. Neutral wire
3. Live wire
4. None of these

Q9. When live wire and neutral wire come in direct contact, it causes (A) short-circuiting

2. No damage
3. Unknown effect

Q10. High power electrical appliances are earthed to (A) avoid shock

1. Aoid wastage
2. Make appliances look beautiful
3. Reduce the bill

### Section 2 - Subjective

Q1. 15 bulbs of 60W each run for 6 hours daily and a refrigerator of 300 W runs for 5hours daily. Work out per day bill at 3 rupees per unit.

Q2. When two resistors are joined in series, the equivalent resistance is 90Ω. When the same resistors are joined in parallel, the equivalent resistance is 20Ω. Calculate the resistance of the two resistors

Q3. Out of the following bulbs rated (40W, 220V), (60W, 220V) and (100W, 220V) which one will glow the brightest when connected in series to a supply of 220v.

Q4. Name two types of wiring system done for domestic wirings.

Q5. What do you mean by earthing?

Q6. HOO J of heat is produced in Hs in a H resistor. Find the potential difference across the resistor.

Q7. What W meant by potential difference between two points?

Q8. Find out the reading of ammeter and voltmeter readings in the crucial given below.

Q9. An electric iron takes a current of 5A and develops 1.5X104of heat energy in 30s. Calculate the resistance of the electric iron.

Q10. How many resisters of 88 are connected is parallel to carry 10A current on a 220V the of n=4 resistors.

### Solutions for Section 1 and 2

#### Objective Problems:

 1. (C) 2. (B) 3. (A) 4. (A) 5. (A) 6. (B) 7. (A) 8. (C) 9. (A) 10. (A)

1. Rs. 20.70

2. 60Ω, 30Ω