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Quiz 1
Mdcat-past-papers - NMDCAT - Physics Quiz
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Board: NMDCAT | Subject: Physics |
1. One of the following is an ohmic device:
Filament bulb
Semiconductor diode
Transistor
Copper wire
2. When a wire is compressed and its radius becomes 2R then its resistance will be:
16R
1/16R
4R
1/4R
3. The unit of resistivity is:
Ohm
Ohm•meter
Ohm/meter
Meter/ohm
4. Resistance of a conductor of a meter cube of substance is:
Resistivity
Conductance
Conductivity
a & c
5. Resistance of a conductor depends upon:
Length
Temperature
Area
All of these
6. In transmission from grid station, power losses are minimized by:
Increasing current
Decreasing current
Increasing resistance
Increasing voltage
7. The slope of distance-time graph will always be:
Negative
Positive
Zero
Maximum
8. Displacement is the rate of change of:
Velocity
Distance
Position
Acceleration
9. When the speed of your car is halved, by what factor does its kinetic energy decrease?
2-Jan
¼
8-Jan
6-Jan
10. If we drop an object, its initial velocity is zero. How far will it fall in time t?
9.8t²
4.9t²
0.49t²
98t²
11. The slope of distance-time graph will be:
Negative
Positive
Zero
Maximum
12. Which law of motion defines force?
1st law of motion
2nd law of motion
3rd law of motion
All define force
13. A handball is tossed vertically upward with a velocity of 19.7 m/s approximately, how much height will it rise?
15 m
25 m
20 m
30 m
14. Displacement-time graph gives us unit:
ms⁻¹
ms⁻²
sec
m
15. The newton-second is unit of:
Work
Power
Impulse
Momentum
16. In elastic collision which of the following is constant?
Momentum
Velocity
Force
All
17. Dimension of momentum is same as:
Impulse
Power
Planck's constant
Same to all
18. If momentum is increased by 13%, then kinetic energy will be increased by:
37%
22.70%
3.47%
Remain constant
19. A 1.75cm height weight-lifter raises weights with a mass of 50kg to a height of 0.5m above his head. How much work is being done by him? (g = 10 m/s²)
212.5 J
250 J
50 J
1225 J
20. Find Power, If m=200Kg, h = 200m, t =10s and g=10ms⁻².
40KW
440KW
440KW
200KW
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