Question: While checked with a multimeter, an open resistor reads –
1. Zero
2. Infinite
3. High but within tolerance.
4. Low but not zero
Answer: 2
Question: How will a red flower appear, if it is seen through a green glass?
1. Red
2. Brown
3. White
4. Green
Answer: 2
Question: Moisture can be removed from lubricating oil using –
1. Tubular centrifugal
2. Clarifier
3. Sparkler filter
4. Vacuum leaf filter
Answer: 1
Question: In a telescope of magnification power 10, the focal length of the objective lens is 60 cm, what will be the total length of eyepiece
1. 6 cm
2. 25 cm
3. 30 cm
4. 50 cm
Answer: 1
Question: A hollow cylindrical rod is filled with air, to make it a resonance column. To produce a wave of length 48 cm the minimum length of rod should be
1. 12 cm
2. 24 cm
3. 48 cm
4. 96 cm
Answer: 2
Question: An object is placed between the pole of concave mirror and the focus of the mirror, the image formed will be
1. Behind the mirror, virtual, erect and magnified
2. At infinity, real inverted and highly enlarged
3. Byond centre of curvature, real inverted and enlarged
4. Beyond 2F, real inverted and enlarged
Answer: 1
Question: When 1 litre of water freezes, the volume of ice formed will be
1. 0.9 litre
2. 1.0 litre
3. 1.11 litre
4. 1.5 litre
Answer: 3
Question: A body is thrown vertically upwards with a speed of 100 m/sec. While coming back on ground, its speed at starting point will be
1. 100 m/sec
2. 1000 m/sec
3. 50 m/sec
4. 200 m/sec
Answer: 1
Question: Which one of the following is not a radioactive element?
1. Uranium
2. Radium
3. Thorium
4. Cadmium
Answer: 4
Question: Superconductors are those materials
1. Which become non-conductors at transition point
2. Which looses all electrical resistance when cooled below a certain temperature
3. In which resistance rises to infinity below certain temperature
4. Which conducts electricity in extra widths
Answer: 2