Jamb 2017 Physics Past Questions And Answers
What is the speed of a body vibrating at 50 cyclic per second
- A. 100 πrads−1
- B. 200 πrads−1
- C. 50 πrads−1
- D. 400 πrads−1
The action of blotting paper on ink is due to
- A. diffusion
- B. osmosis
- C. capillarity
- D. surface tension
From the diagram below, calculate the total current in the circuit
- A. 5.0A
- B. 3.7A
- C. 4.5A
- D. 4.0A
A cell of internal resistance 2 π supplies current to a 6 π resistor. The efficiency of the cell is
- A. 12.0%
- B. 25.0%
- C. 33.3%
- D. 75.0%
When two mirrors are placed at an angle of 90º to each other, how many images will be formed when an object is placed in front of the mirrors
- A. 5
- B. 4
- C. 3
- D. 2
Calculate the electric field intensity between two plates of potential difference 6.5V when separated by a distance of 35cm.
- A. 18.57NC−1
- B. 53.06N C−1
- C. 2.28NC−1
- D. 0.80NC−1
Calculate the angle of minimum deviation of a 60º prism of a refractive index 1.5[ sin−1 (0.75) = 49º]
- A. 38o
- B. 19.47o
- C. 16.25o
- D. 49o
Which of the following is correct about an electric cell?
- A. Primary cell produces a large current for a long time
- B. Secondary cell has a very high internal resistance
- C. Primary cell has a very low internal resistance
- D. Secondary cell has a very low internal resistance
When the r.m.s value of a source of electricity supply is given as 240v, it means that the peak value of the supply is
- A. 240v
- B. 340v
- C. 480v
- D. 57600v
If silicon is doped with phosphorus, what type of semiconductor material will be formed?
- A. Zener material
- B. P-n junction
- C. n-type
- D. p-type