Three 4Ξ© resistors connected in parallel have a potential difference of 16 V applied across them. What is the total current in the circuit?
- A. 14 A
- B. 12 A
- C. 10 A
- D. 8 A
The diagram above shows a balanced metre bridge, the value of x is
- A. 75.0 cm
- B. 66.7 cm
- C. 33.3 cm
- D. 25.0 cm
A cell of e.m.f 12V and internal resistance 4Ξ© is connected to an external resistor of resistance 2Ξ©. Find the current flow.
- A. 5 A
- B. 4 A
- C. 3 A
- D. 2 A
Three capacitors of capacitance 2ΞΌF, 4ΞΌFand 8ΞΌF are connected in parallel and a P.D of 6V is maintained across each capacitor, the total energy stored is?
- A. 2.52 x 10-6J
- B. 6.90 x 10-6J
- C. 2.52 x 10-4J
- D. 6.90 x 10-4J
THe velocity of sound in air at 16oC is 340ms-1. What will it be when the pressure is doubled and its temperature raised to 127ΒΊC?
- A. 400 ms-1
- B. 4,000 ms-1
- C. 8,000 ms-1
- D. 160,000 ms-1
Two metals P and Q of length l1 and l2 are heated through the same temperature difference. If the ratio of the linear expansivities of P to Q is 2:3 and the ratio of lengths is 3:4. What is the ratio of increase in length of P to Q?
- A. 7:5
- B. 5:7
- C. 1:2
- D. 2:1
A bob of weight 0.1 N hangs from a massless string of length 50 cm. A variable horizontal force which increase from zero is applied to pull the bob until the string makes an angle of 60o with the vertical. The work done is?
- A. 0.500 J
- B. 0.250 J
- C. 0.050 J
- D. 0.025 J
The diagram above represents balls in an undulating surface. Which of the following option represents positions of stable equilibrium?
- A. III, IV and VIII
- B. II, V and VIII
- C. III, VI and IX
- D. I, IV and VII
The diagram above shows a velocity – time graph. The statement that is true about this motion is that the car?
- A. has no acceleration between point F and G
- B. decelerates between F and H
- C. has a constant soeed between points E and F
- D. Accelerates between points F and G
From the diagram above, if the potential difference across the resistor, capacitor and inductor are 80 v, 110 v, 40 v respectively, the effective potential difference is?
- A. 116.3 V
- B. 50.0 V
- C. 230.0 V
- D. 106.3 V
Calculate the e.m.f of the cell in the above circuit if its internal resistance is negligible
- A. 12 V
- B. 8 V
- C. 2 V
- D. 36 V
If a light wave has a wavelength of 500nm in air what is the frequency of the wave?
[c = 3 x 10\(^8\) ms-1]
- A. 3.0 x 1014 Hz
- B. 6.0 x 1014 Hz
- C. 6.0 x 1012 Hz
- D. 2.5 x 1014 Hz
The diagram above represents the graph of the force F applied in stretching a spiral spring against the corresponding extension (X). The force constant of the spring is?
- A. 20 Nm-1
- B. 40 Nm-1
- C. 30 Nm-1
- D. 10 Nm-1
The wave phenomenon demonstrated in the diagram above is?
- A. reflection
- B. deflection
- C. diffraction
- D. refraction
The pressure of two moles of an ideal gas at a temperature of 27oC and volume 10-2m3 is?
[R = 8.313 J mol-1K-1]
- A. 4.99 x 105 Nm-2
- B. 9.80 x 103 Nm-2
- C. 4.98 x 103 Nm-2
- D. 9.80 x 105 Nm-2
The terminal velocity of a ball-bearing falling through a viscous fluid is reached when the?
- A. upthrust is equal to the weight of the ball
- B. ball accelerate uniformly
- C. upthrust is equal to the velocity of the ball
- D. velocity is uniform
A body of mass 12kg traveling at 4.2ms-1 collides with a second body of mass 18kg at rest. Calculate their common velocity if the two bodies coalesce after collision?
- A. 1.5 ms-1
- B. 1.4 ms-1
- C. 2.1 ms-1
- D. 1.7 ms-1
A car accelerate uniformly from rest at 4 ms-2. How far will it travel in the fifth complete second?
- A. 100 m
- B. 50m
- C. 32 m
- D. 18 m
An air craft attempt to fly due north at 100 kmh-1. If the wind blows against it from east to west at 60 kmh-1, its resultant velocity is?
- A. 117 kmh-1, N31oE
- B. 127 kmh-1, N31oE
- C. 117 kmh-1, N31oW
- D. 127 kmh-1, N31oW
The value of x, y and z respectively in the expression M\(^x\) L\(^y\)T \(^z\) for the universal gravitational constant G are?
- A. 2, -3, -2
- B. -1, 3, -2
- C. -1, 2, -3
- D. -2, -1, 3
| 14 | N + | 4 | He β | 17 | O + X |
| 7 | 2 | 8 |
In the equation above, the particles X is?
- A. a proton
- B. a neutron
- C. an Ξ± - particle
- D. a Ξ² - particle