Question 2 :
An electric oven of 2 kW power rating is operated in a domestic electric circuit (220V) that has a current rating of 5 A. Will the fuse blow off?
Question 3 :
Choose the incorrect statement from the following regarding magnetic lines of field
Question 5 :
A positively charged particle projected towards West is deflected towards North by a Magnetic Field. The direction of Magnetic Field is
Question 6 :
Imagine that you are sitting in a chamber with your back to one wall. An electron beam, moving horizontally from back wall towards the front wall, is deflected by a strong Magnetic Field to your right side. What is the direction of Magnetic Field?
Question 7 :
State TRUE or FALSE. An electric generator works on the principle of electromagnetic induction.
Question 8 :
The strength of magnetic field inside a long current carrying straight solenoid is
Question 11 :
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?
Question 12 :
How much energy is given to each coulomb of charge passing through a 6 V battery?
Question 13 :
An electric iron consumes energy at a rate of 360 W when the heating is at the minimum and the voltage is 220 V. What is the current when heating is at minimum rate?
Question 14 :
What are the factors resistance of conductor does not depend upon?
Question 16 :
A hot plate of an electric oven connected to a 220 V line has two resistance coils A and B, each of 24 Ω resistance, which may be used separately, in series, or in parallel. What is the current when only one resistance coil is used?
Question 17 :
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 18 :
An electric bulb is rated 220 V and 100 W. What will be the power consumed if it is operated on 110V?
Question 20 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19c7a273b230584979ae7.jpg' />
In the above image, electrical resistivity of some substances at 20° C is given. Which among iron and mercury is a better conductor?