 # Class 10 Science|physics Important Questions for Electricity

Given below are the Class 10 Science Important Questions for electricity
a) Concepts questions
b) Calculation problems
c) Multiple choice questions
e) Fill in the blanks

1. What is relation between KWH and Joule?
2. The Flow of electron constitutes the electric current in the wire.  True or false?
3. A voltmeter has high resistance and it is connected in parallel  True of false?
4. What is resistance of the conductor?
5. What is the SI unit of resistivity?
6. What are the applications of chemical effect of current?
7. What is same across the parallel combination of resistors Voltage or current?
8. What is critical temperature in metals?

## Match the column

 Column A Column B a.The total resistance in series combination  of resistance i. Is less than the smallest individual resistance b.The total resistance in parallel combination  of resistance ii.Equal to sum of the resistances in the series c. The quantity which remains same in every resistors in Series combination iii.Voltage d. The quantity which remains same in every resistors in Parallel combination iv. current e.The quantity which is obtained by the summing up across the resistors in Series Combination v.Is reciprocal of the sum of the reciprocal of all the individual resistance f.The quantity which is obtained by the summing up across the resistors in Parallel Combination

## Table type question

Two heaters A and B are given
 Power Voltage Resistance Current Heater A 100W 220V ? ? Heater B 150W 220V ? ?
Some more questions to be answered based on above data
1. Which Heater for high resistance
2. If 1KWH is priced at 30 paise,which heater  will be turned costlier if they run for 1 hours each

## Fill in the blanks

1. The positively charged electrode in an electrolytic cell is called ________.
2. The positively electrode in an electrochemical cell is known as ___________.
3. The potential difference between the ends of the wire of resistance 1 ohm is doubled, the electric power across the wire will ______ by _____.
4. The commercial unit of electric power is _________.
5. Mercury becomes super conductor when temperature is dropped to _______.
6. During the electrolysis of a salt solution,the electricity is carried by _______ and________.

## Crossword Puzzle Across
3. This law states that current is directly proportional to voltage applied
4. This is a process for depositing a thin layer of desired metal over another metal
5. Instrument used to measure current
6. This alloy is used for making heating elements of electrical appliances

Down
1. Substance having infinite resistance
2. Instrument used to measure Voltage
7. This is the unit of charge

### Practice Question

Question 1 Which among the following is not a base?
A) NaOH
B) $NH_4OH$
C) $C_2H_5OH$
D) KOH
Question 2 What is the minimum resistance which can be made using five resistors each of 1/2 Ohm?
A) 1/10 Ohm
B) 1/25 ohm
C) 10 ohm
D) 2 ohm
Question 3 Which of the following statement is incorrect? ?
A) For every hormone there is a gene
B) For production of every enzyme there is a gene
C) For every molecule of fat there is a gene
D) For every protein there is a gene