Physics PYQ — Page 4

Barium in a suitable form is administered to patients before an X-ray examination of the stomach; because

A hunter aims his gun at a point between the eyebrows of a monkey sitting on a branch of a tree. Just as he fires, the monkey jumps down. The bullet will:

Strips of two metals A and B are firmly jointed together as shown in the figure. [Image: Question Image] On heating, A expands more than B does. If this jointed strip is heated, then it will appear as

Match List I (Quantity) with List II (Units) and select the correct answer using the codes given below the lists: | List-I | | List-II A. | High speed | 1. | Mach B. | Wavelength | 2. | Angstrom C. | Pressure | 3. | Pascal. D. | Energy | 4. | Joule Codes: ABCD

Consider the following statements: An ordinary light bulb has a rather short life because the: 1. filament wire is not uniform. 2. bulb cannot be evacuated completely. 3. wires supporting the filament melt at high temperatures. Which of the above statements are correct?

Endoscopy, a technique used to explore the stomach or other inner parts of the body is based on the phenomenon of

Cobalt-60 is commonly used in radiation therapy because it emits

Low temperatures (cryogenics) find applications in :

Assertion (a) : To dih4te sulphuric acid, acid is added to water and not water to acid. Reason (K) : Specific heat of water is quite 1arge

Consider the following statements: 1. If a person looks at a coin which is in a bucket of water, the coin will appear to be closer than it really is. 2. If a person under water looks at a coin above, the water surface, the coin will appear to be at a higher level than it really is. Which of the above statements is/are correct?

A fuse is used in mains electric supply as a safety device. Which one of the following statements about the fuse is correct?

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. Codes:

Which one of the following is a vector quantity?

The working principle of a washing machine is:

Which one of the following is paramagnetic in nature?

Which one of the following stars is nearest to the Earth?

A smooth plane inclined at an angle 𝜃 with the horizontal as shown in the figure. A body starts from rest and slides down on the inclined surface. The time taken by the body to reach the bottom is: [Image: image]

A girl is swinging on a swing in sitting position. When the girl stands up, the period of swing will:

The alpha particle carries two positive charges. Its mass is very nearly equal to that of

Assertion (A): Transformer is useful for stepping up or stepping down voltages. Reason (R): Transformer is a device used in D.C. circuits. In the context of the above two statements, which one of the following is correct?

Domestic electrical wiring is basically a:

Consider the following statements: A person in a spaceship located half way between the earth and the sun will notice that the: 1. Sky is jet black. 2. Stars do not twinkle 3. Temperature outside the spaceship is much higher than that on the surface of the earth.

When a mirror is rotated by an angle θ, the reflected ray will rotate by:

A liquid is flowing in a streamlined manner through a cylindrical pipe. Along a section containing the axis of the pipe, the flow profile will be: