Question 1 :
In an electrical circuit three incandescent bulbs A, B and C of rating 40 W, 60 W and 100 W respectively are connected in parallel to an electric source . Which of the following is likely to happen regarding their brightness ?

Question 2 :
Two lamps, one rated at 100W-220 V and other 60 W-220 V are connected in parallel to electric mains supply. What current is drawn from the line, if supply voltage is 220 V ?

Question 3 :
A cylindrical conductor of length l and uniform area of cross-section A has resistance R. Another conductor of length 2l and resistance R of the same material has area of cross section

Question 4 :
A copper wire has diameter 0.5 mm, resistance 10Ω and resistivity $1.6×10^{-8}Ω$m.How much does the resistance change if the diameter is doubled?

Question 5 :
What is the name of a device that helps to maintain a potential difference across a conductor?

Question 6 :
A hot plate of an electric oven connected to a 220 V line has two resistance coils A and B, each of 24 $\Omega$ resistance. What is the current when they are used in parallel?

Question 7 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19c79273b230584979ae6.jpg' /> In the above image, electrical resistivity of some substances at 20° C is given. Which material is the best conductor?

Question 8 :
An electric motor takes 5 A from a 220 V line. Determine the energy consumed in 2 h.

Question 9 :
How much power is used in 2$\Omega$ resistor when a 6 V battery is connected in series with 1$\Omega$ and 2$\Omega$ resistors?

Question 10 :
In a schematic diagram of a circuit consisting of a battery of three cells of 2 V each, a 5 ohm resistor, a 8 ohm resistor and a 12 ohm resistor and a plug key, all connected in series and put an ammeter to measure the current through the resistors and a voltmeter to measure the potential difference across 12 ohm resistor. What will be the readings in voltmeter?