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16551.	Why do we use tungsten filament in bulb or lamps ? [2 MARKS]
Answer» Why do we use tungsten filament in bulb or lamps ? [2 MARKS]

Discussion

16552.	1.Material Suitable for making permanent magnet is: a) Steel b) Iron c) copper d) aluminium
Answer» 1.Material Suitable for making permanent magnet is: a) Steel b) Iron c) copper d) aluminium

16552.

1.Material Suitable for making permanent magnet is: a) Steel b) Iron c) copper d) aluminium

Answer»

1.Material Suitable for making permanent magnet is:

a) Steel

b) Iron

c) copper

d) aluminium

Discussion

16553.	Long question (5) What will you do for the sustainable management of natural resource?
Answer» Long question (5) What will you do for the sustainable management of natural resource?

Discussion

16554.	What happens when a ray of light passes through the optical centre of a lens?
Answer» What happens when a ray of light passes through the optical centre of a lens?

16554.

What happens when a ray of light passes through the optical centre of a lens?

Answer»

What happens when a ray of light passes through the optical centre of a lens?

Discussion

16555.	For an inverted image, the sign convention of the height of the image is ___ .
Answer» For an inverted image, the sign convention of the height of the image is ___ .

Discussion

16556.	What is meant by the 'angle of incidence' and the 'angle of refraction' for a ray of light ? Draw a labelled ray diagram to show the angle of incidence and the angle of refraction for a refracted ray of light.
Answer» What is meant by the 'angle of incidence' and the 'angle of refraction' for a ray of light ? Draw a labelled ray diagram to show the angle of incidence and the angle of refraction for a refracted ray of light.

Discussion

16557.	An electric heater is rated at 2 kW. Electrical energy costs Rs 4 per kWh. What is the cost of using the heater for 3 hours ? (a) Rs 12 (b) Rs 24 (c) Rs 36 (d) Rs 48
Answer» An electric heater is rated at 2 kW. Electrical energy costs Rs 4 per kWh. What is the cost of using the heater for 3 hours ? (a) Rs 12 (b) Rs 24 (c) Rs 36 (d) Rs 48

16557.

An electric heater is rated at 2 kW. Electrical energy costs Rs 4 per kWh. What is the cost of using the heater for 3 hours ? (a) Rs 12 (b) Rs 24 (c) Rs 36 (d) Rs 48

Answer»

An electric heater is rated at 2 kW. Electrical energy costs Rs 4 per kWh. What is the cost of using the heater for 3 hours ?

(a) Rs 12

(b) Rs 24

(d) Rs 48

Discussion

16558.	Who are the stakeholders for a forest ?
Answer» Who are the stakeholders for a forest ?

Discussion

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Explore topic-wise InterviewSolutions in .

Why do we use tungsten filament in bulb or lamps ? [2 MARKS]

1.Material Suitable for making permanent magnet is: a) Steel b) Iron c) copper d) aluminium

Long question (5) What will you do for the sustainable management of natural resource?

What happens when a ray of light passes through the optical centre of a lens?

For an inverted image, the sign convention of the height of the image is ___ .

What is meant by the 'angle of incidence' and the 'angle of refraction' for a ray of light ? Draw a labelled ray diagram to show the angle of incidence and the angle of refraction for a refracted ray of light.

An electric heater is rated at 2 kW. Electrical energy costs Rs 4 per kWh. What is the cost of using the heater for 3 hours ? (a) Rs 12 (b) Rs 24 (c) Rs 36 (d) Rs 48

Who are the stakeholders for a forest ?