Concise Physics A Textbook of Science for Class X>Chapter 3 - Part -1>Electricity>Q 2

EASY

10th CBSE

IMPORTANT

Earn 100

Why are standard resistances made of Manganin?

Important Questions on Electricity

EASY

10th CBSE

IMPORTANT

Concise Physics A Textbook of Science for Class X>Chapter 3 - Part -1>Electricity>Q 3

Which has a greater resistance, a toaster of

1 kW

or an electric heater of

2 kW

?

EASY

10th CBSE

IMPORTANT

Concise Physics A Textbook of Science for Class X>Chapter 3 - Part -1>Electricity>Q 4

If an electric bulb is rated

3 V

and

600 mA

, then how would you calculate its resistance if it is lighted for four hours?

EASY

10th CBSE

IMPORTANT

Concise Physics A Textbook of Science for Class X>Chapter 3 - Part -1>Electricity>Q 5

Why do we use alloys in heating elements?

EASY

10th CBSE

IMPORTANT

Concise Physics A Textbook of Science for Class X>Chapter 3 - Part -1>Electricity>Q 6

If a bulb is rated as

5.0 V, 100 mA

, then calculate its power and resistance.

EASY

10th CBSE

IMPORTANT

Concise Physics A Textbook of Science for Class X>Chapter 3 - Part -1>Electricity>Q 7

If two conducting wires of the same material and of equal lengths and equal diameters are first connected in series and then in parallel in a circuit across the same potential difference, then what will be the ratio of heat produced in series and parallel combinations?

MEDIUM

10th CBSE

IMPORTANT

Concise Physics A Textbook of Science for Class X>Chapter 3 - Part -1>Electricity>Q 8

Draw a schematic diagram of a circuit consisting of a battery of three cells of

2 V

each, a

5 Ω

resistor, an

8 Ω

resistor, a

12 Ω

resistor and a plug key, all connected in series. Now, connect the ammeter to measure the current through the resistors and a voltmeter to measure the potential difference across the