Question: To correct his/her vision, a person suffering from short-sightedness will have to use –
1. Convex lens
2. Concave lens
3. Convex mirror
4. Bifocal Lens
Answer: 2
Question: Newton’s 1st Law is the law of –
1. Inertia
2. Force
3. Momentum
4. Acceleration
Answer: 1
Question: Electric fuse wire is made of alloys because alloys –
1. Have low melting point
2. Have high melting point
3. Are economical
4. Do not get heated easily
Answer: 1
Question: Which two colours can be mixed to make green?
1. Yellow and Balck
2. Yellow and Blue
3. Orange and Violet
4. Purple and Yellow
Answer: 2
Question: The conduction current in a chemical cell is –
1. By Positive and negative ions
2. By Positive ions
3. By Negative ions
4. By Positive Holes
Answer: 3
Question: The speed of sound in water is four times its speed in air. When a sound wave of frequency ‘n’ and wavelength ‘λ’ enters from air into water, then its frequency and wavelength will respectively become –
1. 4n and λ
2. n and 4λ
3. 2n and λ
4. None of these
Answer: 2
Question: The required DC voltage for arc welding is –
1. 6 to 9 V
2. 50 to 60 V
3. 200 to 250 V
4. 90 to 100 V
Answer: 3
Question: For a body floating in water, the apparent weight is equal to –
1. Actual weight of the body
2. Zero
3. Weight of the body minus weight of the liquid
4. Weight of the body plus upward thrust
Answer: 3
Question: The ohms law is –
1. R=E/W
2. R=E/I
3. R=E/Z
4. None of these
Answer: 2
Question: Good conductor of electricity is
1. Copper
2. Silver
3. Aluminum
4. Iron
Answer: 2
Question: If signal distorts on increasing the volume, where is the fault?
1. AGC
2. Loud Speaker
3. Volume control
4. Audio stage
Answer: 3