Please select a subject first
Advertisements
Advertisements
A burner raises the temperature of 360 g of water from 40°C to 100°C in 5 minutes. Calculate the rate of heat supplied by the burner.
Concept: undefined >> undefined
A solid of mass 80 g at 80°C is dropped in 400 g water at 10°C. If final temp. is 30°C, find the sp. heat cap. of the solid.
Concept: undefined >> undefined
Advertisements
650 J of heat is required to raise the temp. of 0.25 kg of lead from 15°C to 35°C. Calculate the Sp. heat capacity of lead.
Concept: undefined >> undefined
State, with reason, which of the two, boiling water or steam both at 100°C will produce more severe burns.
Concept: undefined >> undefined
Concept: undefined >> undefined
If 10125 J of heat energy boils off 4.5 g of water at 100°C to steam at 100°C, find the specific latent heat of steam.
Concept: undefined >> undefined
Fill in the following blank using suitable word:
SI unit of heat is .........
Concept: undefined >> undefined
Concept: undefined >> undefined
Shows a lemon crusher. Name the class of lever.
Concept: undefined >> undefined
The diagram below shows a rod lifting a stone.
- Mark position of fulcrum F and draw arrows to show the directions of load L and effort E.
- What class of lever is the rod?
- Give one more example of the same class of lever stated in part (b).
Concept: undefined >> undefined
Complete the following sentence :
On reserving the direction of current in a wire, the magnetic field produced by it gets _____.
Concept: undefined >> undefined
State two factors on which the magnitude of an induced e.m.f. in the secondary coils of a transformer depends.
Concept: undefined >> undefined
The magnetic flux through a coil having 100 turns decreases from 5 milli weber to zero in 5 second. Calculate the e.m.f. induced in the coil.
Concept: undefined >> undefined
Specific heat capacity of a substance A is 3.8 J g-1 K-1 and of substance B is 0.4 J g-1 k-1. Which substance is a good conductor of heat? How did you arrive at your conclusion?
Concept: undefined >> undefined
A liquid X has specific heat capacity higher than the liquid Y. Which liquid is useful as coolant in car radiators.
Concept: undefined >> undefined
A liquid X has specific heat capacity higher than the liquid Y. Which liquid is useful as heat reservoir to keep juice bottles without freezing?
Concept: undefined >> undefined
A piece of iron of mass 2.0 kg has a heat capacity of 966 J K-1. Find its specific heat capacity in S.I unit.
Concept: undefined >> undefined
Water boils at 120 °C in a pressure cooker. Explain the reason.
Concept: undefined >> undefined
State two factors on which the strength of induced e. m.f. depends.
Concept: undefined >> undefined
Describe briefly one way of producing an induced current in a coil. State one factor that determines the magnitude of induced e.m.f.
Concept: undefined >> undefined
