SSC CPO 2018 Physics GK PDF Download :- 13 Q&A’s
Exam was conducted from 12 March to 16 March 2019
Q.9:- Which of the following instruments measures infra-red radiation?
निम्नलिखित में से कौन सा उपकरण अवरक्त विकिरण को मापता है? [14 March 2019 Morng Shift] 1. Pyrheliometer
2. Cathetometer
3. Bolometer
4. Phenograph
Ans:- Bolometer
Explanation:- A bolometer is a device for measuring the power of incident electromagnetic radiation via the heating of a material with a temperature-dependent electrical resistance.
Bolometers are detectors used to measure incident Infrared radiation.
Q.10:- Which of the following is the unit of Magnetic field strength?
निम्नलिखित में से कौन चुंबकीय क्षेत्र की ताकत की इकाई है? [16 March 2019 Morng Shift] 1. Ohm
2. Gauss
3. Tesla
4. Weber
Ans:- Tesla
Explanation:- The International System (SI) unit of field intensity for magnetic fields is Tesla (T). One tesla (1 T) is defined as the field intensity generating one newton of force per ampere of current per meter of conductor:
T = N · A-1 · m-1 = kg · s-2 · A-1
Certain other non-SI units, like Gauss (G), are still occasionally used.
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