Jamb 2004 Physics Past Questions And Answers
What is the speed of a particle of mass 10-27kg whose wavelength is 10-8m. [h = 6.63 x 10-34Js]
- A. 6.63ms-1
- B. 66.30ms-1
- C. 663.00ms-1
- D. 6630.00ms-1
in a series R-L-C circuit at resonance, the voltages across the resistor and the inductor are 30V and 40V respectively, what is the voltage across the capacitor?
- A. 30V
- B. 40V
- C. 50V
- D. 70V
A moving coil galvanometer has a full-scale deflection of 3A equivalent to 30o deflection. The sensitivity of the instrument is
- A. 33.0
- B. 0.1
- C. 90.0
- D. 10.0
In the Rutherford scattering experiment, a beam of alpha particles was fired at a thin gold film with some of the particles being considerably deflected. This shows that
- A. a gold nucleus contains protons, neutrons and electrons uniformly distributed in a tiny volume
- B. the gold nucleus is positively charged and is concentrated in a tiny volume
- C. the gold nucleus emitted alpha particles
- D. the gold nucleus is concentrated in a tiny volume and contains alpha particles
A radioisotope has a decay constant of 10−7s−1. The average life of the radioisotope is
- A. 1.00 x 107s
- B. 6.93 x 106s
- C. 1.00 x 10-7s
- D. 6.93 x 107s
A 100kg box is pushed along a road with force of 500N. If the box moves with a uniform velocity, the coefficient of friction between the box and the road is
- A. 0.4
- B. 1.0
- C. 0.8
- D. 0.5
A steady current of 2A flows in a coil of emf 12V for 0.4s. A back emf of 3V was induced during this period. The stored energy in the loop that can be utilized is
- A. 9.6J
- B. 2.4J
- C. 12.0J
- D. 7.2J
If the angle between two vector P and Q is Oo, the vectors are said to
- A. intersect at the angle 45o
- B. intersect at the angle 60o
- C. be parallel
- D. be perpendicular
The core of an efficient transformer should consist of laminated pieces of metal in order to
- A. increase the heat produced by increasing the eddy current
- B. increase the heat produced by reducing the eddy current
- C. reduce the heat produced by increasing the eddy current
- D. reduce the heat produced by reducing the eddy current
The particle and wave nature of matter are demonstrated in the equation
- A. λ = hc/E
- B. λ = h/P
- C. λ = c/f
- D. λ = 2 d sin θ