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Chapter 10: Heat Capacity & Modes of Heat Transfer
   • CH10: Heat Capacity & Modes Of Heat Transfer  
Chapter 11: Thermal Transformations
   • CH11: Thermal Transformations  
Chapter 12: Waves
   • CH12: Waves  
Chapter 13: Sound
   • CH13: Sound  
Chapter 14: Optics
   • CH14: Optics  
Chapter 15: Electrostatics
   • CH15: Electrostatics  
Chapter 16: Current Electricity
   • CH16: Current Electricity  
Chapter 17: Electric Circuits
   • CH17: Electric Circuits  

1. A fan, a heater and an LED bulb are connected to a battery as shown in the figure. (a) Find equivalent resistance (b) Calculate the current passing through each device.
2. Three resistors 𝑹_𝟏=𝟖Ω,𝑹_𝟐=𝟏𝟐Ω and 𝑹_𝟑=𝟏𝟖Ω are connected in parallel. Calculate the total resistance of the combination.
3. A device with a resistance of 𝟏𝟎Ω is connected to a 𝟏𝟐𝟎𝑽 power source. Calculate the power consumed by the device.
4. A light bulb with a power rating of 60W is switched for 5 hours. Calculate the electrical energy consumed by the light bulb.
5. One hundred identical cells are connected in series, each of emf 𝟎.𝟐𝑽. What will the resultant emf when these identical cells are connected in series? When parallel?
6. In the circuit shown, what is the value of the total resistance of the circuit between points A and B?
7. Calculate the (a) Power consumed, (b) current flowing through and (c) electrical energy consumed by the bulb in the given figure.
8. Calculate the total resistance of the circuit shown in figure.