physics

A force F required to keep a 5kg mass moving round a cycle of radius 3.5 m at a speed of 7 ms‾¹. What is the speed, if the force is tripled?

A. 4.0 ms‾¹ B. 6.6 ms‾¹ C. 12.1 ms‾¹ D. 21.0 ms‾¹ Correct Answer: Option C - 12.1 ms‾¹

4 years ago

The resultant of two forces 12N and 5N is 13N. What is the angle between the two forces?

A. 0° B. 45° C. 90° D. 180° Correct Answer: Option C = 90° Explanation R² - P² + Q²…

4 years ago

The dimension of electromotive force are?

A. ML2T-3I-1 B. ML2T-3I-2 C. M2LT-2I-1 D. M2L2T-1I-1 Correct Answer: Option A = ML2T-3I-1 Explanation Electrical work W = QE,…

4 years ago

which of the below are the uses of transistor?

I. for current amplification. II. for voltage stabilization. III. for power amplification. IV. as a switch. A. I, II, III…

4 years ago

When a pure semiconductor is heated; its resistance?

A. increases B. decreases C. remains the same D. increases and then decreases Correct Answer: Option B - decreases Explanation…

4 years ago

Zener diode is used for?

A. current amplification B. power amplification C. voltage regulation D. energy conversion Correct Answer: Option C = voltage regulation Explanation…

4 years ago

The d.c generator has essentially the same components as the a.c generator except the presence of?

A. slip-ring B. carbon brushes C. split ring D. armature Correct Answer: Option C = split ring Explanation To correct…

4 years ago

A generator is on daily use and in the process; ten 60 W and five 40 W tungsten bulbs are on for the same time interval. The energy consumed daily is?

A. 0.96 kWh B. 19.2 kWh C. 9.60 kWh D. 19.20 kWh Correct Answer: Option B = 19.2 kWh Explanation…

4 years ago