Physics sample paper 1

SAMPLE QUESTION PAPER 1

1. You have two metallic wires of resistances 6 ohms and 3 ohms. How will you connect these wires to get the effective resistance of 2 ohms? 

2. Calculate the electrical energy consumed by a 1200 W toaster in 20 minutes.

3. State Ohm's Law. Write a mathematical expression for it.

4. No two magnetic field lines interest each other. Explain.

5. What precautions should be taken to avoid the overloading of domestic electric circuits?

6. An electric oven of 2KW power rating is operated in a domestic electric circuit (220V), that has a current rating 5 A. What result do you expect? Explain.

7. A piece of wire of resistance 20 ohms is drawn out so that its length is increased to twice its original length. Calculate the resistance of the wire in the new situation.

8. Study the following circuit and answer the following questions.

   (i) State the type of combination of the two resistors in the circuit.
   (ii) How much current is flowing through
      (a) 10 ohms and through
      (b) 15 ohms resistors
   (iii) What is ammeter reading?

9. A positively charged particle projected towards west is deflected towards north by a magnetic field. What is the direction of the magnetic field?

10. Draw the magnetic field lines of the field produced due to a current carrying circular loop.

11. State the law used to find the direction of magnetic field around a straight current carrying conductor.

12. (a) What is a solenoid?
      (b) Draw the field lines of the magnetic field through and around a current carrying solenoid.
      (c) Which rule helps to find the force on a current carrying conductor in a magnetic field? State the rule.