Q. Which of the following statements are true?

View solution

Q. A 250V bulb passes a current of 0.3A. Calculate the power in the lamp.

View solution

Q. Kilowatt-hour(kWh) is a unit of?

View solution

Q. A current of 5A flows in a resistor of 2 ohms. Calculate the energy dissipated in 300 seconds in the resistor.

View solution

Q. Calculate the work done in a resistor of 20 ohm carrying 5A of current in 3 hours.

View solution

Q. The SI unit of power is?

View solution

Q. Which among the following is a unit for electrical energy?

View solution

Q. A bulb has a power of 200W. What is the energy dissipated by it in 5 minutes?

View solution

Q. Out of the following, which one is not a source of electrical energy?

View solution

Q. Which among the following is an expression for energy?

View solution

Q. A battery converts___________

View solution

Q. A current of 2A flows in a wire offering a resistance of 10ohm. Calculate the energy dissipated by the wire in 0.5 hours.

View solution

Q. Practically, if 10kJ of energy is supplied to a device, how much energy will the device give back?

View solution

Q. Materials which easily allow the passage of electric current are known as ______

View solution

Q. A wire of length 2m and another wire of length 5m are made up of the same material and have the same area of cross section, which wire has higher resistance?

View solution

Q. A wire having an area of cross section = 10sqm and another wire having an area of cross section= 15sqm, have the same length and are made up of the same material. Which wire has more resistance?

View solution

Q. Which of the following statements are true with regard to resistance?

View solution

Q. Which, among the following is a unit for resistivity?

View solution

Q. What is the resistivity of Copper?

View solution

Q. Calculate the ratio of the resistivity of 2 wires having the same length and same resistance with area of cross section 2m² and 5m² respectively.

View solution