Q1. The hot resistance of filament of bulb is higher than cold resistance of filament lamp because of temperature coefficient of filament is

Q2. In practice, earth is chosen as a place of zero electric potential because it

Q3. How many coulombs of charge flow through a circuit carrying a current of 10 A in 1 minute?

Q4. E.M.F can be induced in a circuit by___________________.

Q5. If the diameter of the wire is halved its current carrying capacity become about.

Q6. The electrical conductivity of metals is typically of the order of (in \(ohm^{-1}\)\(m^{-1}\))

Q7. An electrical lamp consumes 100 W of power. If the supply voltage is 220 V the energy consumed in 30 minutes is

Q8. Which of the following is the poorest conductor of electricity ?

Q9. 4 resistors of equal value, when connected in series across 250 V supply, dissipate power 25 Watt. If same resistors are connected in parallel, the power dissipation will be

Q10. A 50 W electric light bulb is connected to a 200 V supply. Determine (a) the current flowing in the bulb and (b) the resistance of the bulb.