Jamb 2006 Physics Past Questions And Answers
In an experiment to determine terminal velocity, as the pressure increases, the viscosity of a liquid
- A) increases
- B) decreases
- C) increases then decreases
- D) remains constant
A cell of internal resistance r is connected to an external resistor R. The conductor for maximum power transfer is?
- A) R< r
- B) R = r
- C) R = 2r
- D) R > r
If the radius of the earth is 6.4 x 106m, the escape velocity of a satellite from the earth is? [g = 10 ms-2]
- A) 1.13 x 104 ms-1
- B) 9.00 x 103 ms-1
- C) 8.00 x 103 ms-1
- D) 1.27 x 104 ms-1
During electrolysis, 2.0 g of a metal is deposited using a current of 0.5 A in 3 hours. The mass of the same metal which can be deposited using a current of 1.5 A in 1 hour is?
- A) 1.0 g
- B) 0.5 g
- C) 3.0 g
- D) 2.0 g
A progressive wave equation is represented by y = a sin (150 πt - πt/4). if the phase difference of a progressive wave is 45o, the value of x in the equation is
- A) 3 cm
- B) 4 cm
- C) 1 cm
- D) 2 cm
The component of vector X along the direction of vector Y is zero when
- A) X and Y are in opposite directions to each other
- B) X is at an angle of 45° to Y
- C) X is perpendicular to Y
- D) X and Y are parallel to each other
A conductor has a diameter of 1.00mm and length of 2.00m. If the resistance of the material is 0.1Ω, the resistivity is
- A) 2.55 × 105 Ωm
- B) 2.55 × 103 Ωm
- C) 3.93 × 10-6 Ωm
- D) 3.93 × 10-8 Ωm
When an a.c. voltage is applied to a capacitor, no power is consumed because the current
- A) leads the voltage by 90°
- B) lags behind the voltage by 90°
- C) and voltage are in phase
- D) and voltage are 180° out of phase
The energy associated with the emitted photon when a mercury atom changes from one state to another is 3.3 ev. calculate the frequency of the photon. [e = 1.6 x 10-19c; h = 6.6 x 10-13js]
- A) 1.3 x 10-15 Hz
- B) 3.1 x 1052 Hz
- C) 3.2 x 10-53 Hz
- D) 8.0 x 1014 Hz
The production and type of charge of a body can only be accounted for by the?
- A) deficiency or surplus of electrons
- B) equibrium in protons and neutrons
- C) deficiency or surplus of protrons
- D) deficiency or surplus of neutrons