SAT Physics: Radiations Quiz Questions and Answers PDF - 49

MCQ 241: The higher the temperature of the surface of the object relative to the surrounding temperature, the rate of infrared radiation will be

1. zero
2. equal
3. higher
4. lesser

MCQ 242: A aircraft starts from rest and its propeller produces a forward force of 30000 N. The mass of the aircraft is 35000 kg. If there is no friction then the initial acceleration of the aircraft is

1. 1.16 ms^-2
2. 1.33 ms^-2
3. 0.85 ms^-2
4. 2.36 ms^-2

MCQ 243: For meter rules, the zero mark is often at the rule's

1. end
2. middle
3. start
4. can be at middle or start

MCQ 244: The ratio for the efficiency of a machine is

1. (useful energy output + energy input) × 100&percent;
2. (useful energy output - energy input) × 100&percent;
3. (useful energy input / energy output × 100&percent;
4. (useful energy output / energy input) × 100&percent;

MCQ 245: A medical device using optical fibers to enable doctors to see organs inside a human body, such as intestine, is called

1. lens
2. microscope
3. endoscope
4. light pipe