Physics Past Questions And Answers
The magnitude of the force experienced by a charge of 1.6 x 10\(^{-8}\)C in a uniform electric field of intensity 5 x 105NC\(^{-1}\) is
- A. 3.2 x 10\(^{-14}\)N
- B. 8.0 x 10\(^{-13}\)N
- C. 8.0 x 10\(^{-3}\)N
- D. 3.1 x 10\(^{13}\) N
Which of the following statements is correct about resonance? Resonance occurs when a body
- A. vibrates with its natural frequency
- B. is forced to vibrate on its own natural frequency by another body at the same vibration
- C. vibrates at the frquency of the body causing the vibration
- D. vibrates with an irregular frequency
The focal length of the eye-piece of an astronomical telescope is f1, while the focal length of the object is f2. From normal adjustment, the angular magnification is given by
- A. \(\frac{f_2}{f_1}\)
- B. 1 - \(\frac{f_2}{f_1}\)
- C. \(\frac{f_2}{f_1}\) - 1
- D. \(\frac{f_1}{f_2}\)
A charge 50 µc has electric field strength of 360 NC-1 at a certain point. The electric field strength due to another charge 120 µc kept at the same distance apart and in the same medium is?
- A) 864 NC-1
- B) 150 NC-1
- C) 144 NC-1
- D) 18 NC-1
Calculate the escape velocity of a satellite launched from the earth's surface if the radius of the earth is 6.4x106m
- A. 25.3kms-1
- B. 4.2kms-1
- C. 4.0kms-1
- D. 11.3kms-1
State three differences between magnetic and non-magnetic materials.
The mass of a specific gravity bottle is 15.2g when it is empty. it is 24.8g when filled with kerosene and 27.2g when filled with distilled water. Calculate the relative density of kerosene
- A. 1.25
- B. 1.10
- C. 0.90
- D. 0.80
If the stress on a wire is 107NM−2 and the wire is stretched from its original length of 10.00 cm to 10.05 cm. The young's modulus of the wire is?
- A. 5.0 x 10−4Nm−2
- B. 5.0 x 10−5Nm−2
- C. 2.0 x 10−8Nm−2
- D. 2.0 x 109Nm−2
The physical quantity that has the same dimensions as impulse is
- A. energy
- B. momentum
- C. surface tension
- D. pressure
The amplitude of a sound wave determines its
- A. frequency
- B. quality
- C. loudness
- D. pitch