A fuse is rated 5 A. Can it be used with a geyser rated 1540 W, 220 V. Write Yes or No. Give supporting calculations to justify your answer.

According to the NEW colour convention which colour of wire is connected to: (a) the metal body of the appliance (b) the switch of the appliance?

(a) Which electrical component protects the electric circuit in case of excess current and which can also be used as a switch? (b) Name the wire to which this electrical component is connected in an electric circuit.

The diagram shows wiring in a meter room of a building. (a) What is the current rating of device X? (b) What is the difference between switch Z shown in the diagram and the switches used to operate different appliances at home? (c) What is the unit of the physical quantity displayed in Y?

An electric iron rated 1100 W, 220 V is operated for 5 hours. Calculate: (a) the minimum rating of the fuse required. (b) the energy consumed in kWh. (c) the cost of the energy consumed, if the rate is ₹10 per unit.

The reverse side of a three-pin plug with incorrect connection of wires is shown below. (a) Identify the fault in the above connection. (b) Mention a risk factor involved if the user operates the appliance without correcting it. (c) Will the appliance function in the present situation? (Yes or No)

(a) State one factor that affects the magnitude of induced current in an AC generator. (b) Given below is a circuit to study the magnetic effect of electric current. ABCD is a cardboard kept perpendicular to the conductor XY. A magnetic compass is placed at the point P of the cardboard. P1 and P2 are the positions of the magnetic compass, before and after passing a current through XY respectively. (i) Name the rule that is used to predict the direction of deflection of the magnetic compass. (ii) State the direction of current in the conductor (X to Y or Y to X) when the circuit is complete. (iii) If resistance R is increased, then what will be the effect on the magnetic lines of force around the conductor?

85 g of water at 30°C is cooled to 5°C by adding certain mass of ice. Find the mass of ice required. [Specific heat capacity of water = 4.2 J g−1 °C−1, Specific latent heat of fusion = 336 J g−1]

Two identical marbles A and B are rolled down along Path 1 and Path 2 respectively. Path 1 is frictionless and Path 2 is rough. (a) Which marble will surely reach the next peak? (b) Along which path/s the mechanical energy will be conserved? (c) Along which path/s is the law of conservation of energy obeyed?

(a) Define Centre of Gravity. (b) A hollow ice cream cone has height 6 cm. (i) Where is the position of its centre of gravity from the broad base? (ii) Will its position change when it is filled completely with honey? Write Yes or No.

Study the diagram: (a) Calculate the total resistance of the circuit. (b) Calculate the current drawn from the cell. (c) State whether the current through 10 Ω resistor is greater than, less than or equal to the current through the 12 Ω resistor.

Below is the diagram of a transformer: (a) Identify the type of transformer. (b) In this type of transformer which of the wire is thicker, the primary or the secondary? Give a reason.