30 kmh-1
130 kmh-1
200 kmh
230 kmh-1
Correct answer is A
Since the cars are moving in the same direction, the velocity of a body A, Va,relative to another body B, Vb is given by V = Va - Vb
∴ the velocity of faster car is measured by the observer in the slower car is V = 130kmh-1 - 100 kmh-1 = 30 kmh-1
Breaking point
Yield point
Elastic limit
Proportional limit
Correct answer is A
In the stress - strain graph shown above, X represents the breaking point of the wire
1/4 of its former value
1/16 of its former value
1/2 of its former value
4 times its former value
Correct answer is B
For the two point charges, the magnitude of the electrostatic force between them is given by the equation:
F ∝ 1/r2, and if the distance is increased by a factor of 4, that is new distance = 4r,
then, new force F ∝ 1/(4r)2
= ∝ 1/16r2
Thus it will be 1/16 of the former value
4V
12V
2V
6V
Correct answer is C
The effective capacitance in the circuit is given by:
1/C = 1/2 + 1/3 + 1/6 = 6/6
therefore C = 1μF or
1.0 x 10-6F.
Since C = Q/V, its implies that the charges Q, flowing in the circuit is given by Q = CV
= 1.0 x 10-6 x 12
= 12.0 x 10-6 Coulomb.
∴ P.d across the 6μF,
| V = Q/C = | 12.0 x 10-6 |
| 6.0 x 10-6F |
= 2.0 volts
2.0 x 106J kg-1
5.0 x 106J kg-1
2.0 x 105J kg-1
5.0 x 105J kg-1
Correct answer is D
From the heat exchange involved, the latent heat of vaporization, L can be deduced from the relation:
ML = 106, where M = mass of the liquid.
∴ 2 x L = 106
=> L = 106/2 = 5.0 x 105J kg-1
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