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Quiz 1
Mdcat-past-papers - SZABMU - Physics Quiz
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Board: SZABMU | Subject: Physics |
1. Ohm-meter is the unit of:
Resistance
Resistivity
Conductance
Conductivity
2. The magnitude of the current in metals is proportional to the applied voltage as long as temperature of conductor is kept constant. It is the statement of:
Joule's law
Gauss's law
Ohm's law
Ampere's law
3. The relative permittivity of air (1atm) is:
1
1.0006
22–25
2.284
4. When length of copper wire is doubled then resistivity becomes:
Double
Half
Remains same
Four times
5. The resistance of semiconductor with rise in temperature:
Increases
Decreases
Remain same
Infinite
6. The unit of resistivity is:
Ohm
Ohm•meter
Ohm/meter
Meter/ohm
7. The unit of conductivity is:
S•m
Ohm•m
Ohm
S•m⁻¹
8. The resistance of pure metal increases with:
Increase in temperature
Increase in pressure
Decrease in temperature
Decrease in pressure
9. A heating coil has 10Ω resistance and operates on 20V. Power supplied in 10 seconds is:
100 J
200 J
300 J
400 J
10. The domestic electricity supply in Pakistan has a frequency of:
150Hz
50Hz
100Hz
25Hz
11. Slope of distance-time graph can never be:
Positive
Negative
Constant
Zero
12. Acceleration of light travelling in vacuum:
3 × 10¹⁰ cm/s
Zero
299792458 m/s
1.86000 miles/s
13. The gradient of velocity-time graph is equal to:
Distance
Force
Acceleration
Speed
14. The car is speeding up along negative y-axis then acceleration will be along:
Positive x-axis
Negative y-axis
Positive y-axis
Negative y-axis
15. The slope of velocity-time graph gives us:
Speed
Velocity
Acceleration
Distance
16. When an object starts from rest then first equation of motion is given as:
vF = at
vF = vᵢ + ½at²
vF = vᵢ + at
vF = √(2at)
17. The slope of velocity-time graph gives us:
Speed
Velocity
Acceleration
Distance
18. Slope of displacement-time graph gives the values of:
Displacement
Velocity
Acceleration
Distance
19. Two balls collied each other , it has been observed that collions is elastic. Which statement adovocates the observation:
K.E after collision = K.E before collision
Momentum after collision = K.E after collision
K.E before collision ≠ K.E after collision
Momentum before collision ≠ momentum after collision
20. Two bodies having same mass undergo elastic collision, then their velocities after collision will be:
v₁' = v₂, v₂' = v₁
v₁' = v₂, v₂' = 0
v₁' = v₁, v₂' = v₂
v₁' = 0, v₂' = v₁
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