21 April 2014

Trend Setter Chapter Electricity numerical Problems for class 10 CBSE






1. How much work is done in moving a charge of 2 C across two points having a potentialdifference of 12 V?

2. A wire of resistance R is cut into five equal pieces. These five pieces of wire are then connected in parallel. If the resultant resistance of this combination be R then the ratio of resultant to the original will be?

3. A radio set draws a current of 0.36 A for 15 minutes. Calculate the amount of electriccharge that flows through the circuit.

4. Potential difference between two points of a wire carrying 2 ampere current is 0.1 volt.Calculate the resistance between these points.

5. A simple electric circuit has a 24 V battery and a resistor of 60 ohms. What will be the current in the circuit? The resistance of the connecting wires is negligible.

6.Find resistance between A and B in following network
Picture

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2 comments:

  1. Problem 1:
    A current of 0.5 A is flowing through the resistance of 10Ω.Find the potential difference between its ends.
    Solution:
    Current I = 0.5A.
    Resistance R = 10Ω
    Potential difference V = ?
    V = IR
    = 0.5 × 10

    = 5V.
    Problem :2
    A supply voltage of 220V is applied to a 100 Ω resistor.Find the current flowing through it.
    Solution
    Voltage V = 220V
    Resistance R = 100Ω
    Current I = V = 220 = 2.2 A.
    R 100

    Problem : 3
    Calculate the resistance of the conductor if a current of 2A flows through it when the potential difference across its ends is 6V.
    Solution:
    Curren t I = 2A.
    Potential difference = V = 6.
    Resistance R = V
    I
    = 6 .
    2
    = 3 ohm.

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