The working Principle of washing Machine is?
Important Questions on Physics
A fuse is used on main electric supply as a safety device. Which one of the following statements about the fuse is correct?
The following items consist of two statements, one labelled as the 'Assertion (A)' and the other as 'Reason (R)'. You are to examine these two statements carefully and select the answer to these items using the codes given below:
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true but R is not the correct explanation of A
(c) A is true, but R is false
(d) A is false, but R is true
Assertion (A): The temperature of a metal wire rises when an electric current is passed through it.
Reason (R): Collision of metal atoms with each other releases heat energy.
Consider the following Statement:
An ordinary light bulb has a rather short life because the,
1: Filament wire is not uniform.
2: Bulb can not be evacuated completely.
3: Wire supporting the filaments melt at high temperature.
Which of the above statement is correct?
Match List I (QUANTITY) with List-II (UNITS) and select the correct answer using the codes given below the lists:
| List 1 | List 2 |
| High speed | Mach |
| Wavelength | Angstrom |
| Pressure | Pascal |
| Energy | Joule |
Codes-
| A | B | C | D | |
| a | 2 | 1 | 3 | 4 |
| b | 1 | 2 | 4 | 3 |
| c | 1 | 2 | 3 | 4 |
| d | 2 | 1 | 4 | 3 |
For which of the following is capillarity NOT the only reason?
Consider the following Statements:
- If a person looks at a coin that is in a bucket of water, the coin will appear to be raised.
- If a person underwater looks at a coin above, the water surface, the coin will appear to be at a higher level.
Which of the above statement(s) is correct/are correct?
