# Electricity

Subject matter experts of JagranJosh have developed chapter wise practice questions as per the relevancy of the chapter in the CBSE board exam. This practice set contains 10 questions with detailed explanations on “Chapter: Electricity” of Science.

• Q1.The potential difference across the 3 Ω resistor is:  • Q2.V1, V2 and V3 are the potential differences across the 1Ω, 2Ω and 3Ω resistors in the following diagram, and the current is 5A. Which of the following shows the correct values of V1, V2 and V3 measured in volts? • Q3.A wire of resistance R1 is cut into five equal pieces. These five pieces of wire are then connected in parallel. If the resultant resistance of this combination be R2, then the ratio R1/ R2 is: • Q4.Two appliances of rating 200 watt-250 volts and 100 watt-250 volts are joined in series to a 250 volts supply. Total power consumed in the circuit is • Q5.When a current 'I' flows through a resistance 'R' for time 't' the electrical energy spent is given by   