Draw a circuit diagram for verifying Ohm's law. Connect a resistor, an ammeter, a plug key, a battery and a voltmeter across the resistor. Show the direction of the flow of current.

Ohm's law states that, at constant temperature current flowing in the circuit is directly proportional to the potential difference across the circuit. The ratio of the potential difference to the current is given by the resistance. Ohm's law verifies the resistance is constant for the conductor at constant temperature.

Electricity and magnetism are linked to each other. Two fuse wires A and B of the same length but rated 20 A and 10 A respectively which will be more thicker and why?

Fuse wire acts as a safety device as it breaks the circuit when current exceeds in the circuit. Resistance is inversely proportional to the area of cross-section of a conductor. Thickness represents the area of conductor. Hence, the conductor which allows 20 A will have thicker. Fuse wire with 20 A will break if the current passing through it exceeds 20 A .

Observe the correlation in the first pair and complete the second pair: Resistor or resistance : :: Rheostat : __________

Ohm is the SI unit of the resistance of ohmic conductor. The ratio of potential difference to the current gives the resistance of the conductor. Its symbol is given by Resistor or resistance : Rheostat is a device which can control the flow of current through it by varying resistance. Its symbol is given by Rheostat :

Observe the correlation in the first pair and complete the second pair: 1 volt = 1 Joule 1 Coulomb :: 1 ohm = ________

Ohm is the SI unit of the resistance of ohmic conductor. Ohm's law states that at constant temperature the potential difference is directly proportional to the current flowing through it. The ratio of potential difference to the current gives the resistance of the conductor. 1 ohm = 1 volt 1 ampere

E M B I B E

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 12 - Electricity>Goa Board-2019>Q 6

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IMPORTANT

Earn 100

Select the most correct alternative given below each statement and write the completed statement:

An appliance like an electric iron takes a current from circuit rated _____

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Important Questions on Electricity

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IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 12 - Electricity>Goa Board-2019>Q 7

Select the most correct alternative given below each statement and write the completed statement:
An electric fuse is used to ________

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IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 12 - Electricity>Goa Board-2019>Q 8

Soham uses a $600 W$ Music System for $5$ hours daily. Calculate the electrical energy consumed in $kWH$ for $30$ days.

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IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 12 - Electricity>Goa Board-2019>Q 9

Draw a neat circuit diagram as described below :
Connect three Resistors $R 1$ , $R 2$ and $R 3$ in Parallel, connect them with a battery, ammeter and a plug key, insert a voltmeter across the resistors. Show the direction of the flow of current.