- Suggest two reasons which make the large scale usage of nuclear energy prohibitive.
- Why are solar cookers covered by a glass plate?
- What is the colour of insulation over the earth wire? Why is an earth wire connected to metallic part of appliances?
- What are the factors on which the resistance of a conductor depends upon? Write a mathematical expression for the same.
- What is a solar panel? Mention any three of its applications.
- Write four characteristics of a good source of energy.
- Why is a series arrangement not used in domestic circuits?
- An electric iron has rating 750 W, 220 V; Calculate (i) Current passing through it, (ii) Its resistance when in use.
- Draw magnetic field lines around a bar magnet. List any two properties of the magnetic field lines.
- How can a piece of soft iron be transformed into an electromagnet? Draw a circuit diegram to show the same.
- (a) A 12 V battery is connected to the arrangement of resistors below. Calculate (i) the total effective resistance of the arrangement. (ii) The total current in the following circuit.
![ckt ckt](http://plustwophysics.com/wp-content/uploads/2010/10/ckt_thumb.jpg)
(b) State Ohm’s law. What constant can be obtained by calculating the slope of a VI graph?
No comments:
Post a Comment
Do not spam. Spammers will be banned from this site