Column I gives some devices and Column II gives some processes on which the functioning of these devices depend. Match the devices in Column I with the processes in Column II and indicate your answer by darkening appropriate bubbles in the 4 × 4 matrix given in the ORS.
← IIT-JEE 2007 · Paper 2
PhysicsMatrix match+6Question 22 of 66
IIT-JEE 2007 · Paper 2, Physics question 22
Column I
- ABimetallic strip
- BSteam engine
- CIncandescent lamp
- DElectric fuse
Column II
- PRadiation from a hot body
- QEnergy conversion
- RMelting
- SThermal expansion of solids
| P | Q | R | S | |
|---|---|---|---|---|
| A | ||||
| B | ||||
| C | ||||
| D |
Answer and worked solution
Official answer: A → Q, S; B → Q; C → P, Q; D → Q, R
- A, bimetallic strip: bends because the two metals expand differently (and turns heat into mechanical motion). → Q, S.
- B, steam engine: converts heat into mechanical work. → Q.
- C, incandescent lamp: the hot filament radiates; electrical energy becomes light and heat. → P, Q.
- D, electric fuse: Joule heating melts the wire. → Q, R.
The key also accepts A → S, C → P and D → R alone.
Answer: A → Q, S; B → Q; C → P, Q; D → Q, R