Electricity Class 10 imp. questions
Electricity Class 10 imp. questions (part 3)
- An electric lamp is marked 100 W, 220 V. It is used for 5 hours daily. Calculate (i) its resistance while glowing (ii) energy consumed in kWh per day.
- A bulb is rated at 5.0 volt, 100 mA. Calculated its (i) power (ii) resistance.
- An electric bulb draws a current of 0.2. A when the voltage is 220 volts. Calculate the electric charge flowing through it in one hour.
- What is a voltmeter? How is it connected in a circuit?
- Which of the two has greater resistance: a 1 kW heater or a 100 W tungsten bulb, both marked for 230 V?
- What are the factors on which the resistance of a conductor depends? Give the corresponding relation.
- A copper wire of length 2 m and area of cross-section 1.7×10-6m has a resistance of 2 x 10-2 ohms. Calculate the resistivity of copper.
- Why is very less quantity of heat energy produced in the connecting wires?
- Which one has more resistance 100 watt bulb or 60 watt bulb?
- How much energy is given to each coulomb of charge passing through a 6V battery?
- What determines the rate at which energy is delivered by a current?
- What does an electric circuit mean?
- Name a device that help to maintain a potential difference across a conduct..
- Judge the equivalent resistance when the following are connected in parallel (a) 1Ω and 106 Ω (b)1Ω, 103 Ω and 106Ω
- Define the term electric energy. Write an expression for the electric energy consumed in an electric circuit.
- What is meant by power-rating of an appliance? A bulb is rated as 60 W, 220 V. What does it indicate?
- Let the resistance of an electrical component remains constant while the potential difference across the two ends of the component decreases to half of its former value. What change will occur in the current through it.
