MEDIUM
10th CBSE
IMPORTANT
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Why is an alloy manganin or Eureka used to make standard resistances?

Important Questions on Electricity

EASY
10th CBSE
IMPORTANT
Science Part-I NEW ERA PHYSICS Textbook for Class X>Chapter 1 - Electricity>IMPORTANT QUESTIONS>Q 21
Why is the tungsten used almost exclusively for the filament of electrical lamps? 
EASY
10th CBSE
IMPORTANT
Science Part-I NEW ERA PHYSICS Textbook for Class X>Chapter 1 - Electricity>IMPORTANT QUESTIONS>Q 22
Why are copper and aluminium wires usually for electricity transmission?
MEDIUM
10th CBSE
IMPORTANT
Science Part-I NEW ERA PHYSICS Textbook for Class X>Chapter 1 - Electricity>IMPORTANT QUESTIONS>Q 23
Should the heating element of an electric iron be made of iron, silver or nichrome wire?
EASY
10th CBSE
IMPORTANT
Science Part-I NEW ERA PHYSICS Textbook for Class X>Chapter 1 - Electricity>IMPORTANT QUESTIONS>Q 24
Four resistances 2.0 Ω of each are joined end to end to form a square ABCD. Calculate the equivalent resistance of the combination between two adjacent corners.
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EASY
10th CBSE
IMPORTANT
Science Part-I NEW ERA PHYSICS Textbook for Class X>Chapter 1 - Electricity>IMPORTANT QUESTIONS>Q 25
A wire of length l and resistance R is stretched so that its length is doubled and the area of cross-section is halved. How will its resistance change?
EASY
10th CBSE
IMPORTANT
Science Part-I NEW ERA PHYSICS Textbook for Class X>Chapter 1 - Electricity>IMPORTANT QUESTIONS>Q 25
A wire of length l and resistance R is stretched so that its length is doubled and the area of cross-section is halved. How will its resistivity change?
 
MEDIUM
10th CBSE
IMPORTANT
Science Part-I NEW ERA PHYSICS Textbook for Class X>Chapter 1 - Electricity>IMPORTANT QUESTIONS>Q 26

Identify the V-I graphs for ohmic and non-ohmic materials.

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Give one example for each.

EASY
10th CBSE
IMPORTANT
Science Part-I NEW ERA PHYSICS Textbook for Class X>Chapter 1 - Electricity>IMPORTANT QUESTIONS>Q 28
Draw a schematic diagram of a circuit consisting of a battery of 12 V, three resistors of 5 Ω, 10 Ω and 20 Ω connected in parallel, an ammeter to measure the total current through the circuit, voltmeter to measure the potential difference across the combination of resistors.