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Dev Kumar

Asked: October 20, 2020In: Class 10

A copper wire has diameter 0.5 mm and resistivity of 1.6 × 10–8 W m. What will be the length of this wire to make its resistance 10 W? How much does the resistance change if the diameter is doubled?

NCERT Solution for Class 10 Science Chapter 12 Electricity NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-221 Questions No-6

Dev Kumar

Asked: October 20, 2020In: Class 10

When a 12 V battery is connected across an unknown resistor, there is a current of 2.5 mA in the circuit. Find the value of the resistance of the resistor.

NCERT Solution for Class 10 Science Chapter 12 Electricity NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-221 Questions No-8

Umangi Grover

Asked: October 20, 2020In: Class 10

A battery of 9 V is connected in series with resistors of 0.2 ohm, 0.3 ohm, 0.4 ohm , 0.5 ohm and 12 ohm, respectively. How much current would flow through the 12 ohm resistor?

NCERT Solution for Class 10 Science Chapter 12 Electricity NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-221 Questions No-9

Umangi Grover

Asked: October 20, 2020In: Class 10

How many 176 ohm resistors (in parallel) are required to carry 5 A on a 220 V line?

NCERT Solution for Class 10 Science Chapter 12 Electricity NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-221 Questions No-10

Umangi Grover

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 2022-2023 CBSE Board and UP Board Exercises Questions Page No-221 Questions No-11

A copper wire has diameter 0.5 mm and resistivity of 1.6 × 10–8 W m. What will be the length of this wire to make its resistance 10 W? How much does the resistance change if the diameter is doubled?

When a 12 V battery is connected across an unknown resistor, there is a current of 2.5 mA in the circuit. Find the value of the resistance of the resistor.

A battery of 9 V is connected in series with resistors of 0.2 ohm, 0.3 ohm, 0.4 ohm , 0.5 ohm and 12 ohm, respectively. How much current would flow through the 12 ohm resistor?

How many 176 ohm resistors (in parallel) are required to carry 5 A on a 220 V line?

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.

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