Hall Effect Quiz Questions and Answers PDF - 197

MCQ 981: Hall Effect was discovered by Edwin Hall in

1. 1879
2. 1979
3. 1998
4. 1834

MCQ 982: If object having mass of 7.6 Km/s is in a circular orbit around the earth, at an altitude of 520 Km and constant speed of 7.6 Km/s, then object's acceleration will be

1. 2 m/s²
2. 2.5 m/s²
3. 8.4 m/s²
4. 14.4 m/s²

MCQ 983: Mass of Mercury is

1. 102x10²⁴ kg
2. 0.642x10²⁴ kg
3. 4.87x10²⁴ kg
4. 0.330x10²⁴ kg

MCQ 984: Refractive index of vacuum is

1. Exactly 1
2. 1.00029
3. 1.33
4. 1.36

MCQ 985: Electric charges with same electrical sign

1. attract each other
2. repel each other
3. does not affect each other