Tiwari Academy Discussion

Asked: October 20, 2020In: Class 10

Show how you would connect three resistors, each of resistance 6 W, so that the combination has a resistance of (i) 9 ohm, (ii) 4 ohm.

NCERT Solution for Class 10 Science Chapter 12 Electricity NCERT Books for Session 2020-2021 CBSE Board and UP Board Exercises Questions Page No-221 Questions No-11

Umangi Grover

Asked: October 20, 2020In: Class 10

Several electric bulbs designed to be used on a 220 V electric supply line, are rated 10 W. How many lamps can be connected in parallel with each other across the two wires of 220 V line if the maximum allowable current is 5 A?

NCERT Solution for Class 10 Science Chapter 12 Electricity NCERT Books for Session 2020-2021 CBSE Board and UP Board Exercises Questions Page No-221 Questions No-12

Umangi Grover

Asked: October 20, 2020In: Class 10

A hot plate of an electric oven connected to a 220 V line has two resistance coils A and B, each of 24 ohm resistance, which may be used separately, in series, or in parallel. What are the currents in the three cases?

NCERT Solution for Class 10 Science Chapter 12 Electricity NCERT Books for Session 2020-2021 CBSE Board and UP Board Exercises Questions Page No-221 Questions No-13

Umangi Grover

Asked: October 20, 2020In: Class 10

Compare the power used in the 2 ohm resistor in each of the following circuits:

NCERT Solution for Class 10 Science Chapter 12 Electricity NCERT Books for Session 2020-2021 CBSE Board and UP Board Exercises Questions Page No-221 Questions No-14 Compare the power used in the 2 ohm resistor in each of the following circuits: (i) ...

Umangi Grover

Asked: October 20, 2020In: Class 10

Two lamps, one rated 100 W at 220 V, and the other 60 W at 220 V, are connected in parallel to electric mains supply. What current is drawn from the line if the supply voltage is 220 V?

NCERT Solution for Class 10 Science Chapter 12 Electricity NCERT Books for Session 2020-2021 CBSE Board and UP Board Exercises Questions Page No-222 Questions No-15

Umangi Grover

Asked: October 20, 2020In: Class 10

Which uses more energy, a 250 W TV set in 1 hr, or a 1200 W toaster in 10 minutes?

NCERT Solution for Class 10 Science Chapter 12 Electricity NCERT Books for Session 2020-2021 CBSE Board and UP Board Exercises Questions Page No-222 Questions No-16

Umangi Grover

Asked: October 20, 2020In: Class 10

An electric heater of resistance 8 W draws 15 A from the service mains 2 hours. Calculate the rate at which heat is developed in the heater.

NCERT Solution for Class 10 Science Chapter 12 Electricity NCERT Books for Session 2020-2021 CBSE Board and UP Board Exercises Questions Page No-222 Questions No-17

Umangi Grover

Asked: October 20, 2020In: Class 10

Explain the following

NCERT Solution for Class 10 Science Chapter 12 Electricity NCERT Books for Session 2020-2021 CBSE Board and UP Board Exercises Questions Page No-222 Questions No-18 Explain the following. (a) Why is the tungsten used almost exclusively for filament of electric lamps?

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