In the diagram above, which of the angles \( \theta _1 \) , \( \theta _2 \) , \( \theta _3 \) and \( \theta _4 \) is the angle of deviation of the ray of light passing through the glass prism XYZ?
A\( \theta _3 \)
B\( \theta _2 \)
C\( \theta _1 \)
D\( \theta _4 \)
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Question 2
jamb1997
When the sun, moon and the earth are as shown in the diagram above an observer standing in X is in
APenumbra and sees a partial eclipse
BPenumbra and sees a total eclipse
Cumbra and sees a partial eclipse
Dumbra and sees a total eclipse
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Question 3
jamb1997
The diagram above shows two wave forms P and Q at a particular instant in time. the two waves will interface
Adestructively to produce a wave of larger amplitude
Bdestructively to produce a wave of smaller amplitude
Cconstructively to produce a wave of larger amplitude
Dconstructively to produce a wave of smaller amplitude
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Question 4
jamb1997
For a rough inclined plane on which lies a body of weight W, the angle θ in the diagram above becomes the angle of friction if
Atan θ = coefficient of static friction
Bcos θ = coefficient of dynamic friction
Csin θ = coefficient of sliding friction
Dsec θ = limiting frictional force
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Question 5
jamb1997
A uniform light beam XZ is Hinged at X and kept in equilibrium by the forces T and F as shown in the diagram above. if XO = 20cm and OY = 30cm, express T in terms of F
AT =2√3/3
BT= 2F
CT = 5V3F/3
DT = 5F
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Question 6
jamb1997
The fig above shows a block of mass m sliding down a rough inclined plane QP at angle \( \theta \) . The forces acting on the block along QP are
Amg sinθ and the normal reaction
Bmg sinθ and the force of friction
Cmg sinθ and the normal reaction
Dmg cosθ and the normal reaction
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Question 7
jamb1997
For what value of \(\theta\) are the forces in the diagram above in equilibrium
A\( 15^{\circ} \)
B\( 30^{\circ} \)
C\( 45^{\circ} \)
D\( 60^{\circ} \)
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Question 8
jamb1997
Find the standard deviation of the following data -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5
A2
B3
C√10
D√11
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Question 9
jamb1997
The following are the scores of ten students in a test of 20 marks: 15, 16, 17, 13, 16, 8, 5, 16, 19, 17. What is the modal?
A13
B15
C16
D19
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Question 10
jamb1997
The graphite rods surrounding the uranium fuel rods in a nuclear reactor, are used to
Aabsorb the neutrons and hence halt the nuclear process
Bcreate the neutrons and hence slow up the nuclear process
Cslowdown the neutrons and hence slow up the nuclear process
Dspeed up the neutrons and hence speed up the nuclear process
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Question 11
jamb1997
One of the features of the fission process is that
Aits products are not radioactive
Bit leads to chain reaction
Cneutrons are not released
Dthe sum of the masses of the reactants equals the sum of masses of the products
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Question 12
jamb1997
In a purely inductive circuit, the current
Alags behind the voltage in phase by 90o
Bleads the voltage in phase by 90o
Cis in the same phase with the voltage
Dleads the voltage by 180o
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Question 13
jamb1997
The voltage of the domestic electric supply is represented by the equation V = 311 sin314.2t. Determine the frequency of the a.c. supply [\(\pi\) = 3.142]
A50.0Hz
B100.0Hz
C311.0Hz
D314.2Hz
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Question 14
jamb1997
The power dissipated in an a.c. circuit with an r.m.s, current of 5A, r.m.s voltage of 10V and a phase angle of 60o is
A25W
B50W
C120W
D125W
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Question 15
jamb1997
What is the total electrical energy consumed by using an electric cooker rated 1000W for 5 hrs?
A5.3 x 103J
B6.5 X 103J
C1.8 X 107J
D2.3 X 107J
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Question 16
jamb1997
Two 50\(\mu\)F parallel plate capacitors are connected in series. The combined capacitor is then connected across a 100-V battery. The charge on each plate of the capacitor is
A5.00 x 10-5C
B2.50 x 10-3C
C1.25 x 10-3C
D1.00 x 10-2C
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Question 17
jamb1997
In a meter bridge experiment, two resistor 2\(\Omega\) and 3\(\Omega\) occupy the left and right gaps respectively. Find the balance point from the left side of the bridge
A20cm
B40cm
C60cm
D80cm
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Question 18
jamb1997
If 8 x 10\(^{-2}\) J of work is required to move 100\(\mu\)C of charge from a point X to a point Y in an electrical circuit, the potential difference between X and Y is
A4.0 x 102 v
B4.0 x 104 v
C8.0 x 102 v
D8.0 x 10-2 v
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Question 19
jamb1997
A galvanometer of internal resistance 50\(\Omega\) has a full scale deflection for a current of 5mA. What is the resistance required to covert it to a voltmeter with full scale deflection of 10V?
A1750\(\Omega\)
B1950\(\Omega\)
C2000\(\Omega\)
D2500\(\Omega\)
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Question 20
jamb1997
Three electric cells each of e.m.f 1.5V and internal resistance of 1.0\(\Omega\) are connected in parallel across an external resistance of \(\frac{2}{3}\)\(\Omega\). Calculate the value of the current in the resistor
